Bearing Maintenance

Rust, corrosion
Injury Status: rust and corrosion of spherical ball bearings have raceways round of pit-like rolling surface rust, rust and corrosion round.
The reason: water, corrosive substances (paint, gas, etc.) intrusion. Lubricants inappropriate. Due to condensation of water vapor with water droplets. Temperature and humidity when stopped. During transport heavy rustproof bad. Inappropriate custody status. Inappropriate use.
Measures: to improve the sealing device. Research lubrication. Turn when stopping corrosion protection. Improve storage methods. To be used with caution.
Installation scars
Damage state: When you use during installation and removal, etc. to the roll axis linear scars road surface and rolling surface caused.
Cause: The installation, disassembly of the inner and outer rings tilt installation, impact load of destruction.
Measures: the impact load to prevent the use of appropriate tools to use punch. Centering each other during installation.
Discolor
Damage state: As temperatures rise and lubricants reactions, raceways and rolling elements and the wheel cage discoloration.
The reason: poor lubrication. Causing hot oiled and reflect lubricant. Large temperature rise.
Measures: improving lubrication.
From the foregoing, regardless of the gap can be adjusted or non-adjustable gap bearings, they have to adjust the axial clearance in the assembly (the gap is not adjustable but some do not have to stay thrust roller bearing xial clearance), when the temperature rises to compensate for shaft the thermal elongation, thus ensuring the normal operation of thrust ball bearing body. If the axial clearance is too small, it will cause the bearing to rotate difficulties, fever, and even bearing body stuck or damaged; if the axial clearance is too large, it will result in different sound operation, vibration or even cause serious damage to the retainer .

Thrust ball bearings common faults and necessary remedial measures

Bearings and shaft diameter or bearing bore interference small, multi-use push method assembly. The easiest way is to use copper and hand hammer, according to a certain order to beat self aligning bearing with symmetrical interference fit of the seat, the thrust ball bearings successfully pushed. Alternatively, use a soft metal hammer into the casing by hand or push press. If improper operation, will make the seat deformation cracking, or hammering at the hands of non-interference fit on the seat, then make the body produce bearing raceways and indentation or indirect bearing is damaged.
Bearing in the assembly, if interference with the shaft diameter is large, the general assembly of thermal loading method. Upcoming needle roller bearings into drums filled with oil, the oil drums external heating with hot water or flame, the process requires heating the oil temperature control at 80 ℃ ~ 90 ℃, generally not more than 100 ℃, up to no more than 120 ℃. Quickly removed after the suit in the journal bearing heating. If the temperature control to improper heating temperature is too high, then make the bearings caused tempering hardness decreased, thrust ball bearings running on easy to wear, peeling, or even cracking.
Stripped
Injury Status: under load bearing and then rotate the inner ring, outer ring raceway or rolling a decent showing scaly due to rolling fatigue peeling phenomenon.
Cause: The load is too large. Install bad (non-linearity) torque loads foreign invasion, water. Poor lubrication, improper lubricant thrust ball bearing clearance inappropriate. Bearing box accuracy is not good, the deflection of the bearing box uneven shaft rigidity large rust, caused by the development of erosion points, scratches and indentations (surface deformation phenomena).
Measures: The size and re-use of the Institute to improve the load agricultural bearings checking installation methods to improve the sealing device shutdown rust. Using the appropriate viscosity lubricant to improve lubrication method. Check the shaft and precision bearing housing. Check the clearance.
Peeling.

Self-aligning ball bearings judgment in the use of the method of fault maintenance

bearings exhibit during its use in the strong regularity and repeatability is very good. Normal quality Full complement cylindrical roller bearing (Bearings) at the start of use, vibration and noise are relatively small, but some scattered spectrum amplitude are small, may be due to some defect in the manufacturing process, such as the surface of burrs caused.
Some time after exercise, maintain a certain level of vibration and noise, the spectrum is a single, there is only one or two multiplier. Rarely occurs more than three times the power frequency spectrum, self-aligning ball bearing condition is very stable to stable period.
After continuing to run into the post-use, bearing vibration and noise begins to increase, sometimes different sound, but changes in vibration increases more slowly this time, suddenly began bearing kurtosis value reaches a certain value. We believe that at this time that the performance of the initial bearing failure.
At this time, it requires close monitoring of the  bearings, pay close attention to the changes. Since then, single direction thrust ball bearing kurtosis began a rapid decline, and close to normal, and the vibration and noise began to significantly increase its growth began to accelerate dramatically, when the vibration exceeds the vibration standards (such as ISO2372 standard), which began bearing kurtosis Rapid increases, when both exceed vibration standards, and kurtosis values ​​than normal (available kurtosis relative standard), we believe that self-aligning ball bearing has entered the late failure of production, the need for timely maintenance equipment, replacement of bearings.
bearings exhibit features advanced fault to a serious failure (usually as axle bearing damage, burns, sand shelf spallation, raceway, wear beads, etc.) is not more than a week the big time, the greater the equipment capacity, the faster the speed, The shorter time intervals. Therefore, the actual self-aligning ball bearing fault diagnosis, once found fault with advanced features, faulty judgment should be decisive rolling mill bearing arrangements for maintenance as soon as possible.
Use the adjustment factor mainly refers to the installation, use and maintenance, repair and other maintenance meets the technical requirements. According to bearing installation, use, maintenance, maintenance of the technical requirements for the operation of bearings to withstand load, speed, temperature, vibration, noise and lubrication condition monitoring and inspection, abnormal immediately find reasons to adjust, to return to normal.
First, the spindle of the spindle bearings in operation, to fully ensure lubrication, and regularly add oil according to the actual situation, not long off the oil. So, for the user enterprise, should be used better and more appropriate spindle oil. New special spindle oil can significantly improve the lubrication performance, extended drain intervals, extend the spindle and self-aligning ball bearing life, but also has good rust and corrosion performance.
Secondly, the use of reinforced nylon material bearing cage, temperature should be below 120 ℃, non-oil cooking cleaning.
In addition, the spindle maintenance cleaning method should pay attention to prevent damage, scratches the roller surface. bearing parts to try to clear the residue should be rinsed clean bolster internal suction method is better than oil. Should be taken to avoid the use of cleaning garbage dump type leaving residues accumulate in the bearing area, leading to self-aligning ball bearing noise, wear failure and other problems.

Aligning ball bearing failure in the use of reason analysis

According to incomplete statistics, cement fan failure rate of abnormal vibration and up to 58.6% maximum, due to vibration will cause the fan to run unbalanced. Which,  thin section angular contact bearings with adapter sleeve to adjust properly, can cause abnormal bearing temperature and vibration. If a cement plant during equipment maintenance and replacement of the turbine vanes. Vanes on both sides with an adapter sleeve bearings and bearing a fixed match. Re-test the free end of the bearing temperature occurs, the value of high vibration failures. Open housing cap, manual slow rotating fans, found in a particular location shaft bearing roller, roll the situation there in a non-load area, which can determine changes in the high bearing running clearance and the installation space may be insufficient. After measuring that, self-aligning ball single-row crossed roller slewing bearing internal clearance of only 0.04mm, the eccentric shaft up to 0.18mm.
Preferred to correctly grasp the bearing parts in mechanical devices used to select suitable bearing premise. Whom, the following aspects need to obtain data and information:
1, the function and structure of mechanical devices
2, bearing the use of the site
3, bearing load (size, direction)
4, the rotational speed
5, vibration, shock
6, the bearing temperature (ambient temperature, temperature)
7. Select the ambient atmosphere (corrosive, cleaning, lubrication) usually bearing configuration.
bearing shaft is a two-aligning ball bearings in radial and axial be supported at this time, the side of the bearing is called a fixed-side bearing its two kinds of radial and axial loads from the fixed axis and effect relative axial displacement between the bearing housing. The other side is called the free side, only radial loads, axial relative movement, in order to solve the problem and retractable portion angular contact ball bearing installation interval error due to temperature changes resulting from the axis. For fixed-side bearing, the rolling bearing need to select an available surface in the axial direction to the mounting surface to move or moves. In a relatively short shaft, and the free-side fixed-side little other cases, the use of only one-way axial movement of the fixed bearing. Select the type of the selected bearing bearing type, self-aligning ball bearings to fully grasp the conditions of use are essential.

Thrust ball bearings imported process need to pay attention

Imported thrust ball bearings in addition to excellent quality, they are all very precise parts, both high-performance import thrust ball ferris wheel bearing  if used improperly during use, not only fail to achieve performance results, and very easy to import thrust ball bearing damage, in lubrication we certainly have attention.
First, when used carefully to be allowed to install a powerful punch, does not allow a direct hit with a hammer bearing, are not allowed to pass through the rolling pressure.
Second, the use of appropriate, accurate installation tools to make use of special tools, try to avoid using fabric and staple fiber stuff like that.
Third, try to keep clean thrust ball bearings imported and its surroundings smile even invisible dust into the mobile crane bearing  will increase wear, vibration and noise of the bearing.
Fourth, to prevent the import of thrust ball bearings rust bare hands when handling the import thrust ball bearings, to fully wash hands sweat, and coated with high quality mineral oil and then operate in the rainy season and summer with particular attention to prevention rust.
In some special operating conditions, import thrust ball bearings can get a longer life than traditional computing, especially in the light-load conditions. These particular operating conditions that, when the rolling surface (track and rolling elements) are effectively separated and limit pollutants may cause surface damage of a lubricant film. In fact, under ideal conditions, the so-called permanent import thrust ball bearing life is possible.

Spherical roller bearing temperature rise causes and treatment methods

When the bearing temperature rises, first determine whether the malfunction, as indeed increased, should be treated as follows:
1, bearing installation position is not correct, it will cause a large ball end and bearing inner race and outer race gear units of the axial force, resulting in bearing overheating.
2, the best selection of bearings specified levels of precision linear motion bearings.
3, using the bearing shaft bending or fever caused by different heart box hole solution is to repair the spindle
4, bearing belt too tight cause fever solution is to adjust the belt so elastic appropriate.
5, the heat caused by poor lubrication solution is chosen lubricating materials specified grades and properly cleaned.
6, the heat caused by the low quality of assembly solution is to improve the quality of assembly.
7, bearing in the housing causing fever lap solution is to replace worn parts bearings and related balance correct impeller diameter and check static equilibrium value
8, the axial force caused by too much heat solution is clean, align the seal ring clearance requirements
9, bearing damage caused by the heat of solution is to replace the bearings. When we use spherical roller bearings, and if we find that under high temperature conditions, then quickly stop the operation of equipment, and then to find out why, and processed in accordance with the above solutions provided, but may be due to bearing fever for different reasons, so the solution in different ways, they still want to treat specific conditions, completed with the help of the technical staff.

The reason cylindrical roller bearing failure analysis failure

Before cylindrical roller bearings completely destroyed, it provides users find enough time, do not ignore the existence of such friction, it will make riding the rate of decline, so long-distance physical consumption bigger slower. If the surface roughness for fine, if appropriate lubricant film thickness, the probability of surface stress generated quite low, which is why the proper selection of a suitable lubricating oil to reason, however, if the load exceeds the pressure the film's pu value (fatigue load limits, such as high speed, high pressure shock), the fatigue of materials will come sooner or later.
Cylindrical roller bearings metallurgical data quality was once the primary factor affecting early bearing out effective. Followed by metallurgical skills (such as bearing steel vacuum degassing, etc.) to improve the original data quality improvement. Raw material quality factors bearing out the efficiency analysis in the proportion had clearly declined, but it is still one of the main factors bearing out the effect of the impact. Proper selection can still be bearing out the efficiency analysis is necessary to think of the elements.
Cylindrical roller bearings off the primary obligation of efficiency analysis is based on a lot of sets of information, analyze data, and out-efficient way, the primary elements of the bearing to find out the effect of the formation, so that puts forward improved ways to extend bearing service constitutes execution , to prevent the onset of unexpected early bearing off effect.
(1), the impact of cylindrical roller bearing fatigue life factor very much, can not be estimated or through standardized test to eliminate all the premise, which forms bearing fatigue life of the great practice of discrete, thus bearing dejected expression parameter for life extra life L10, R281 in the ISO specification referral understand the meaning of the L10 following rules:
"The number enough thrust roller bearing the same group, with its extra revolutions L10 life (or unchanged by the number of hours to disclose the performance in speed, bearing 90% of the batch before the occurrence of fatigue exploitation can reach or exceed this the number of revolutions (or hours). "So far, the world's nations are subject to the above rules.
In the United States and other countries, and also with the use of the concept of the value of life. Median life means a group of the same LM cylindrical roller bearings of the median life, meaning 50% of a bearing before fatigue spalling can reach or exceed the total number of revolutions or rotational speed of the tasks in a number of inevitable from time to time, the value LM bearing life is not the life of a group of arithmetic uniform value. The median life expectancy of ordinary LM is about five times the extra life.
(2), the concept of extra life together only for a sufficient number of the number of bearings, and the sub for a single bearing.
40 sets of 6204 patients if their use shall be regarded as bearing its lifetime 1000h without additional episodes dejected destroyed, the other four sets is possible that less than 1000h showing off dejected efficient excavator bearing, meaning extra fatigue life on behalf of these cylindrical Roller bearings in the information to develop their potential to the normal life of hope. Thus greatly in both conditions, the user selects the cylindrical roller bearing fatigue life is still first for accounting, and then based on the practice of checking out the effect of categories, such as checking the wear life, take the smaller value accounting consequences bearing life calculation .
The reason cylindrical roller bearings in advance damaged (improper lubrication)
Although you can install the "maintenance" of the rubber seal bearing, but the early failure of the bearings are still 36 percentage is due to the incorrect application of grease caused.
Any improper lubrication of cylindrical roller bearings, early failure are inevitable, due to the plastic hub ball and roller combined bearing is not easy to dismantle the site, and congenital incorrect use grease, while later use without replacing the grease, or not promptly replaced after deterioration pollution carbonized grease, your hub is difficult to have a sufficiently long life and good lubrication.

Four cylindrical roller bearing temperature and vibration troubleshooting methods

A bearing vibration:
Bearing vibration of the bearing damage is very sensitive, such as peeling, indentation, corrosion, cracks, wear, etc. will be in four cylindrical roller bearing vibration measurement reflected, therefore, through the use of special bearing vibration measurements (frequency analyzer, etc. ) measure the size of vibration frequency can not be inferred by abnormal circumstances. The measured values ​​due to the conditions of use or the sensor mounting position of the bearing, etc., and therefore requires prior to measurements after the analysis of each machine were compared to determine the criteria.
Two, bearing temperature:
The bearing temperature, generally room temperature outside the bearing can be inferred, if the use of the hole can be measured directly bearing outer ring temperature, is more appropriate position.
Typically, four cylindrical roller bearings with four point contact ball slewing bearing operating temperature slowly began to rise 1-2 hours to reach steady state. The normal temperature of the bearing due to heat capacity, heat capacity, speed and load of the machine and different. If lubrication, install the appropriate department, the bearing temperature will be rapid rise, there will be abnormal high temperature, when to stop running and take the necessary precautions.
You can always use the thermal sensor to monitor bearing operating temperature, and automatic alarm or stop to prevent burning shaft accident temperature exceeds a predetermined value.
Four row cylindrical roller bearing fault characteristic showed severe failure does not exceed a week when a large, larger equipment, capacity, speed, the shorter time interval. Therefore, the actual bearing fault diagnosis, once found fault with advanced features, should decisively determine the spherical roller bearing failure, repair as soon as possible.
1, the shaft and the bearing chamber tolerances choice and control: bearings pressed into the bearing should be flexible rotation without blocking sensation. If significant rotation is not flexible, it means that the shaft size is too big, the tolerance to be reduced.
2, the bearing assembly methods: Because spherical roller bearing are precision products, such as improper assembly easy on the four-row cylindrical roller bearing channel damage, leading to bearing damage.
3, the assembly to prevent foreign bodies: four-row cylindrical roller bearings in the rotor balancing equipment to do when it is easy to scrap generated when balancing into the interior of the bearing, so it is best to do before loading bearing balancing.
4, paint rust prevention: after the paint rust is characterized by multiple sealed-type motor, the motor assembly, sound good, but put in the warehouse for some time, the motor becomes very abnormal sound, remove the bearing severe rusting.
Four row cylindrical roller bearings in the process of checking, if too many problems, but also that this may be counterfeit bearings imported bearings. That is to remind everyone in the choice must be careful.

How to removing bearings

Bearing disassembly is regular maintenance performed bearing replacement. After the demolition, if continued use, or still need to check the status of the bearings of its demolition should be careful when installing the same. Careful not to damage the excavator bearing of the parts, especially the interference fit bearing disassembly, operation difficult.
Designed according to need removal tool is also very important. When removing, according to the drawings research demolition methods, with the condition the order to investigate the bearing, in order to achieve foolproof demolition job.
Removing the outer ring of the outer ring of the interference fit, prior to the housing of the outer circumference of the extrusion screw with a few screws, tighten the screws evenly on one side, while the demolition. These usually cover screw holes blind plugs, tapered roller bearings and other separation-type bearings in a housing block on the shoulders set out several incisions, using pads, with press demolition, or tapping the demolition.
Removal of the inner ring, you can use the press pull easiest. At this point, we should pay attention to your inner bear its pullout. Furthermore, as shown in the drawing tools are mostly La use, regardless of the kind of fixtures, it must be firmly stuck in the inner sides. To do this, you need to consider the size of the shaft shoulder block, or research on machining grooves in the shoulder block to use drawing fixtures.
Large cross roller bearings inner ring disassembly by hydraulic method. The hydraulic pressure to be set through the bearing hole, so that the drawing is easy. Width of bearing the hydraulic method and drawing fixtures and use, disassembly operations.
Cylindrical roller bearing inner ring disassembly can take advantage of induction heating. Local heating in a short time, so that the inner expansion after drawing methods. You need to install a large number of this type of bearing inner ring of the occasion, also uses induction heating method.
I hope shortly before installation, just open the bearing package. General grease lubrication, not clean, direct filling grease. Lubricating oil, general do not wash, however, the instrument used or high-speed bearings, etc., use oil washed clean, removing the coating on the thrust roller bearing

 of the rust inhibitor. Remove the bearing rust inhibitor, rust, it can not be placed aside. Furthermore, a grease-enclosed bearing has not cleaned directly.
Bearing installation method, because the bearing structure, with the condition varies, generally, due to multi-axis rotation, so the inner need interference fit. Cylindrical bore bearings pressed into the multi-purpose presses, or by hot charging methods. Cone of the occasion, mounted directly on the tapered shaft or sleeve installation.
When mounted to the housing, and more generally with the clearance, the outer ring had a surplus quantity, usually pressed into the press or shrink fit method also has cooling installation. With dry ice as the coolant, shrink fit installation of the occasion, moisture in the air will condense on the surface of the bearing. Therefore, the need for appropriate corrosion protection.

Precision machine tool spindle bearings

Spindle bearings are precision machine tool spindle bearings and similar devices, its work to ensure the accuracy and precision machine tool performance.
Series spindle bearings
series ball screw support bearings with angular contact thrust ball bearings,
series bearings include: open bearing, sealed mobile crane bearing series.Ball screw bearings, with high stiffness, high performance, increased sealed series, complete model, widely used.
series spindle bearings Specialty
1, high-performance design
High rigidity: a few more balls, 600 contact angle, stiffness.
Long life: the use of long-life, high reliability EP steel, life expectancy is three times the normal bearing steel SUJ2's.
2, contact Sealed Bearings: high reliability, high dust resistance
Sealed bearing dust resistance, grease easily leak. And the use of light-contact seals, bearings torque at low, low heat.
3, installation convenience
Open three row roller slewing bearing: it can provide the product has been greased and shorten the installation time.
Sealed bearings: already filled with grease, and different colors on the back and front of the ring, for easy identification direction.
Ball screw support bearings with angular contact thrust ball bearings series of open, sealed bearing series.
Bearing is an important foundation for all types of machinery and equipment parts,its precision,performance,longevity and reliability of the host precision , performance,longevity and reliability play a decisive role . Mechanical products, bearings are precision products , not only requires a comprehensive support mathematics,theoretical physics and many other disciplines , and materials science , heat treatment technology , precision machining and measuring technology , digital technology and efficient numerical methods and powerful computer technology and many other disciplines to serve , so the thrust ball bearing

 is also a representative of the national scientific and technological strength of the product.

Bearing Science & Technology precision bearings: for wind turbine "core"

Core Tip Bearing Science & Technology Precision Bearing heavy machinery industry projects a total investment of 438 million yuan, with a total construction area of ​​56,300 square meters. Year after completion of the wind turbine can produce for supporting the yaw bearings, pitch crane bearing, gearboxes and other industries for all types of large, large bearing 12,600 sets.
"312 meters long, 57 meters wide, with a total area of ​​18,000 square meters. If you press area calculation, our workshop, deserved to become the first Chinese bearing industry." The 4th, LYHY Bearing Science in advanced manufacturing industry cluster When Technology Precision Bearing heavy machinery industrial projects construction site, division general manager of a major type someone led the reporter to visit just built a huge workshop said proudly.
In this huge workshop in the future to specialize in the production of various precision bearings.
As the only national comprehensive research institute a class of China's bearing industry, Bearing Science & Technology is principally engaged in the aerospace, aviation and machine tool precision bearings, offshore crane bearing sets of special ultra-fine grinding equipment, bearing special testing equipment, high-speed electric spindle bearings and other "high, Fine, research sharp "product research, development, production and testing.
According to reports, the smallest bearing diameter shaft research technology manufactured only 0.5 mm, the largest bearing diameter reached 6 meters. Moreover, Bearing Science & Technology has mastered the core technology of wind power bearing, heavy machinery and other large truck mounted crane bearing

 formed with independent intellectual property rights in product design, production processes, testing and test technologies, products reach the world advanced level.
It is in this context, in order to seize the strategic opportunity for the country to develop wind power and other green energy, Bearing Science & Technology in August 2008 launched a decisive Precision Bearing heavy machinery industry projects, its goal is to provide wind turbines ancillary products, bigger and stronger bearings industry. Currently, the project has been completed a project for all civil construction, more than 60 sets of processing equipment has been installed in place third.Zhangjun Jiang said that the workshop will feature machining area is divided into the car, grinding area, gear machining area, heat treatment and other regional and several large drilling area. Project Phase Spring officially put into operation after 2010. A project put into production, annual profit of 93.46 million yuan, mechanical manufacturing and related industries have a significant role in boosting the demonstration. Phase II will be completed by July civil tasks.

Application of the tilt sensor on heavy machinery

Tilt sensor applications is already very widespread, many machines and electronic devices are in use above the tilt sensor, tilt sensor can be used in heavy machinery, or above, the following Chinese sensors trading network come to you specifically tell us about it.Now more and more engineering machinery and equipment to the electro-hydraulic system transition from traditional mechanical hydraulic system, especially for the wide application bus replacement and upgrade the efficiency of construction machinery products provide a very good technology platform. Such as pavers, graders, excavators, lifts, cranes, etc., to achieve automatic control, you need to tilt the body itself and the implementing agencies to measure, but security is also widespread attention. For example, the verticality of rotary drilling rig mast rig measurements and prior work, the need for the entire mechanical equipment itself to adjust the attitude and want to reach the level of state; lifting deck crane bearing boom angle and excavator digging depth control, etc. angular measurements need to be controllable.
Shuo Feng Technology as a leader in the field of angle measurement for the construction machinery industry offers a variety of measurement accuracy, applications, input / output, and the apparent size of the angle sensor products, including a variety of output signals RS485, RS232, SPI, analog output, etc. / interface. Meanwhile Luoyang Huayang Special Heavy-Duty and Large Bearing Manufacturing Co.,ltd. To meet the diverse and specific technical requirements, provide orientation when drilling deep hole measurement products and complete applications as well as applications of vibration detection.
The angle of the crane bearing boom chassis leveling measurements Crane with a variety of models, do a lot of weightlifting work every day around the world, but unfortunately often the accident, when the load could cause the tilt or turn, some accidents are devastating. The investigation of the accident many conclusions drawn, a consensus is that if an accident near the former operator to get some form of warning, most of the accidents can be avoided.
To reduce accidents, manufacturers developed a number of safety systems: safety load monitors, these sophisticated real-time monitoring system to change marine crane bearing

. In order to make a required measurement is critical to the functioning of the system is a boom angle, which is measured by the tilt sensor, which is the typical inclination sensor applications.
Cranes on the chassis before work to reach the level of the entire state apparatus, on the one hand to ensure safe operation, on the other hand, the maximum tonnage lifting. This is achieved by a dual-axis tilt sensor to measure the inclination of the chassis in all directions, while the angle of the output signal to the PLC to drive the hydraulic ram to achieve the chassis level. Angle measurement used to calculate the boom lifting height and make the entire device to prevent the occurrence of excessive lifting overturning.

Bearing Maintenance

   Bearing damage for many reasons: beyond the originally expected load, the non-effective sealing, tight fit caused by too small bearing clearance and so on.Broadly speaking, one-third of deck crane bearing damage due to fatigue damage, third is due to poor lubrication, the third is due to contaminants from entering the bearing or improper installation process. Fatigue is the result of the shear stress occur periodically formed on the surface of the load. After a period of time, the shear stress will lead to microcracks, and gradually extends to the surface. When the rolling elements through these cracks, the crack block off there, forming a so-called peeling phenomenon. Increases with the increase in the stress and crack the block, resulting in the spread of the peeling area. The damage in the form of process usually lasts a very long time, and its stage is visible increase in noise and vibration time. Therefore, before the complete destruction of the ferris wheel bearing, which provides the user sufficient time to find and replace it. For the Port of large lifting equipment, such as shore container cranes, gantry cranes, the main lifting mechanism, trolley mechanism bearing replacement cycle is generally 25000h, gantry crane traveling mechanism, bearing replacement cycle is generally luffing mechanism 6300 ~ 10000h. The specific time depending on the bearing replacement actual usage and maintenance of the state.
    Axis skew can cause various parts of a machine malfunction, especially for large port lifting equipment, the basic principles of its institutions are from the motor to the gear box input torque increases and then output to the respective transmission parts. Therefore, the strips run institutions in various parts of the center line adjustment is particularly important, the right to the heart of the work is preventive maintenance work is a very important part. Basic does not mind, there are two types, one for the parallel-type, a different perspective of the formula. However, the actual situation is usually a combination of these two types. Skewed axis will produce a moment. This moment will be the bearing in the drive unit and the driven unit, reaction force is generated. Because does not mind the increased load of about 20% to 50% will reduce bearing life.
    Another consequence of that is the seal wear, with the resulting contaminants into the bearing or oil spills, the crisis has brought damage wind power bearing

.Therefore,the correct working of the heart can be improved bearing and seal life. For high energy consumption harbor large lifting equipment, can reduce vibration, noise and energy consumption. Centerline adjustment often make use of dial indicators and other tools. Exhaust ports for loading large lifting equipment motors, gear boxes and other transmission parts, the general will face runout control within 0.1mm, radial runout controlled within 0.05mm.

Wind power bearings

    Wind, this ancient and clean energy is becoming one of the world's fastest growing energy source. In situations of booming global wind industry , Luoyang Huayang Special Heavy-Duty and Large Bearing Manufacturing Co.,ltd.has become a professional manufacturer of wind power bearing design, development, manufacture slewing ring bearings in one of the industrial manufacturing company. The company is widely used at home and abroad advanced technology slewing ring bearing products, standards, process methods,manufacturing a variety of forms and series of slewing ring bearing products are widely used  in engineering, construction, mining, metallurgy, shipbuilding, ports, petroleum, chemical,
light engineering, environmental protection, aviation, wind power, military and
instrumentation industries, products are exported to Germany, South Korea, the United States, Japan and Southeast Asia and other countries.
    In roller bearings generally operate only part withstand the load, and the area where this part of the roller bearing area we call the bearing. The thin wall bearings load size, the size of the clearance operation will have an impact on the bearing area. If the bearing area is too small, the roller in the actual operation is prone to slippage.
    For wind power gearbox, if the spindle is designed with reali slim bearings

 support programs, then theoretically only torque is transmitted to the gearbox. In this case, after a simple mechanical analysis, we find that the carrier supporting the bearing load is relatively small, so the load zone of the bearing is often relatively small, roller prone to slipping. In the design of wind turbine gearbox carrier support bearings generally use two single-row tapered roller bearings or cylindrical roller bearing two full programs.

deck crane bearing Deck crane

Set machinery in the ship deck. This compact crane structure, the ship has more deck area available, less impact on the bridge upstairs sight. Deck cranes bearing easy operation, mobile crane bearing‍ high working efficiency, and flexibility, before the job is no tedious preparatory work widely.

Deck cranes commonly used fixed rotating cranes, mobile cranes and gantry cranes rotation. Transmission power transmission and electricity - two hydraulic drive.

Fixed rotating crane

This crane most widely used, can be used alone or self aligning bearing‍ in pairs in the starboard job. Weight is generally 3 to 5 tons. In the multi-purpose boat, requires a single crane can lift a 20 ft container, twin-lift can lift 40 feet container (30 tons), its starting weight of up to 25 to 30 tons.

wind power bearing

The installation of the bearing should clean environment, small particles from entering the bearing will shorten bearing life. When replacing bearings to maintain a clean environment is very important. Allowed to tap with a hammer bearing note bearing not fall to the ground (or similar improper handling). Single Row Ball Slewing Bearing‍ Before installing the shaft and the bearing housing should also check the condition of even a small amount of wear can also lead to poor fit, thereby causing early failure of the bearing.

On the wheel hub bearing unit, do not attempt to disassemble or adjust the wheel hub bearing seals unit, otherwise it would cause water damage to seals or dust from entering. Even ring and inner ring raceway are damaged, resulting in permanent failure of the bearing.

The ring is equipped with ABS unit has a magnetic thrust bearing ring, which thrust ring can not be a collision, impact or collision with other magnetic field. Remove from the box before installation, so that they stay away from magnetic fields, such as the use of electric motors or electric tools. mobile crane bearing‍ When installing these bearings, the road test by observing the dashboard ABS alarm pin to change the bearing operation.

Equipped with ABS wheel hub bearing magnetic thrust ring, thrust ring mounted in order to determine which side, you can use a small light near the edge of something * bearings, magnetic bearings will be attracted by it generated. When installing a magnetic thrust will take the side of the ring pointing inside, is on the ABS sensor. Note: Incorrect installation may lead to functional brake system failure.

Many of the bearings are sealed, this type of bearing is not needed throughout the life of the grease increases. Other non-sealed bearings such as double row tapered roller bearings in the installation must be added grease. Because different lumen size of the bearing, it is difficult to determine how much of the added fat, the most important thing is to ensure that the grease bearing if too much fat, when the bearing is rotating, the excess conical bearing‍ oil will bleed. General Experience: During installation, the total amount of oil to account for 50% of the bearing clearance.

Install the lock nut due to the different types of bearings and bearing housings, the size difference between the torque is great. Note reference to the relevant instructions.‍

wheel bearing Precautions Wheel Bearing

Wheel Bearing worn or damaged wheel bearing or hub units will happen to your vehicle and the cost of higher anachronistic failure in traveling the road, or even damage to your safety. Wheel bearings in use and installation Please note the following:

1, in order to ensure maximum safety and reliability, it is recommended that you no matter how long the age of the vehicle should always check the wheel bearings - note bearing for wear marine crane bearing‍ early warning signals: including any friction noise when rotating or turning wheel suspension combination when the deceleration is not normal.

Rear-wheel drive vehicle is recommended for the vehicle to 38,000 km is to deal with the front wheel hub bearing lubrication. When replacing the brake system, check the bearing and replace the seal.

2, If you hear noise emitted wheel bearing parts, first of all, it is important to find the location of the noise occurs. There are many moving parts may produce noise, but also may be some rotation member and the rotating member occurs without contact. If the confirmation is bearing noise, bearing may be damaged and need replacing.

3, because the front wheel bearing failure on both Single Row Ball Slewing Bearing‍ sides led to similar working conditions, so even if only one bearing bad, it is recommended to replace in pairs.

4, wheel bearing more sensitive, in any case need to adopt the right approach and the right tools. In storage and during installation, the bearing parts can not be damaged. Requires a large number of bearings pressed into the pressure, so the need of special tools. Be sure to reference vehicle manufacturers instructions.

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LYHY deck crane bearing Repair and maintenance

How wheel bearing repair and maintenance

Automotive wheel bearings is important to walk parts. Wheel bearings reduce friction chassis bears during the operation, the task of maintaining normal driving the car. If a wheel bearing failure, single direction thrust ball bearing‍ may cause the phenomenon of noise, deck crane bearing fever, especially the front wheel is more obvious, easily lead to runaway direction dangerous phenomenon. Therefore, the wheel bearings must be maintained on schedule.

Check wheel bearings

(1) Check the tightness of wheel bearings, first inspected the car at one end of the wheel hub axle set up, with the support car stool, wood and other appliances to cover the car a conical bearing‍ good car safely stand.

(2) Rotate the wheel a few laps examined to see whether the smooth rotation, if there is no abnormal noise. If the rotation is not smooth and there is friction sound, indicating that the brake part is not normal; if there is no noise, when the rotation is not smooth and tight loose, indicating that the bearing part is not normal. When the above irregularities should dismantling the hub. For a small car, check wheel bearings, with both hands up and down the side of the tire, the tire pulled his hands back and forth, repeat several times. If normal, then there should be no Songkuang and arrest feeling; If there are obvious Songkuang swing feel, should be overhauled wheels.

(3) Check the braking areas. Usually when marine crane bearing‍ checking wheel bearings, with wheel brake inspection, if there are traces of oil inside of the tire, probably the brake cylinder or brake lines caused by the oil spill, it is timely to identify the reasons, be excluded.

wind power bearing Wheel Bearing Maintenance

Before removing wheels, wheel maintenance should do the preparatory work, the car parked and set up axles, in order to ensure the maintenance of security operations.

(1) Remove the hub shaft head decorative conical bearing‍ cover, dust cover;

(2) Remove the wheel nuts and tires, be careful not to bruise the tire bolt threads. If disc brakes, the brake should be removed, and then used pliers to remove the lock ring or locking pin.

(3) with a special tool to remove the wheel hub;

(4) scrape bearings, journal and hub cavity of the old grease, cleaning wheel bearings and journal with detergent and wipe dry with a cloth, wipe with a cloth wheels last cavity.

(5) Check the wheel bearings and bearing races, found cracks, fatigue spalling and loose roller bearings and other phenomena, replace bearings. If you find pitting on the bearing race, single direction thrust ball bearing‍ it should replace the bearings.

When cope with the situation (6) Check the bearing bore and the journal, with the gap should not exceed 0.1Omm measuring journal, should be in the upper and lower parts of the vertical ground (where the largest wear parts) measurements. If used with the gap exceeds the limit, replace the bearing, so back to normal with the gap. Burr is not allowed to play, pitting the journal to narrow the gap.‍

wheel bearing

Upon completion of all parts meet the requirements, the inner bearing grease after release hub.

When grease the bearing cavity attention should be squeezed into the bearing grease until grease to date to emerge from the other side of the bearing. In the hub and shaft Double Row Ball Slewing Bearing‍ cranial cavity Apply a thin layer of grease to make it play a role in rust. Note that the hub cavity do not apply too much grease, otherwise it will affect the cooling and braking.

The hub and the outer bearing back onto the journal, hand-axis head adjustment nut, and then use the required shaft torque wrench to tighten the adjustment nut. After tightening the nut, turn the wheel a few times to be around to see the bearing installation; on the other hand, by turning the bearing and seat properly fit. At this time bearing tightness appropriate wheels to rotate freely and not feel the axial clearance.

Finally, in order to install the locking plate, fixing nut, tires, dust cover and decorative cover and other parts.

Wheel bearings adjusted, with some marine crane bearing‍ mileage (about 1Okm), stop and check for swab touch wheel temperature, if fever, is caused by the bearing adjustment too tight, should be re-adjusted appropriately relaxed bearing tightness.

Non-normal wheel bearing damage causes

In the repair process, often found that some cars have a greater driving noise, no abnormal tire wear inspection, turn the wheels on the lift no abnormal sound. This phenomenon is often caused by abnormal wheel bearing damage caused by the so-called non-normal means of bearing damage caused by the installation of. Automotive wheel bearings are generally double row ball bearing, at the time of installation of the bearing installation if you use a hammer percussion, or when the bearing is installed into the bearing inner race of the bearing by pressing installed, thin wall bearings‍ will cause one side of the bearing raceways damage. Noise when the vehicle is traveling, and when the wheelie is better since the raceway side, and therefore noise was heard. Correct installation operation is the key to long life bearings.

LYHY deck crane bearing With ABS sensor wheel hub bearing units

As more and more cars equipped with ABS, ABS function is also growing. To solve the wheel speed sensor wheel speed to provide a signal to the ABS costs exist, installation and signal quality and other aspects of the development of the integrated ABS pulse generator hub bearing unit.

Wheel bearing units with ABS sensors, conical bearing‍ including flanges, ring gear rotating body, the seal assembly and hub with ABS sensors on the wheels, ABS sensor ring magnet rotating body suit on, and with the phase complexes; rotating body and a ring gear fixed to the flange was connected. ABS sensor includes a housing, the magnet and the coil, the ring magnet fitted over the rotating member, the rotating member fitted with the ring magnet; coil via a signal line and a connector. Rotating body and flange ring was spline connection. End face is provided with a flange with bolt holes directly with suspension, brakes and tires connections. Hole in the flange has splines can be used in conjunction with a constant velocity drive shaft. The utility model is beneficial effect: the structure to replace the original car steering Double Row Ball Slewing Bearing‍ knuckle, wheels, bearings portfolio, both the three functions are integrated, but also greatly reduces the size of the original structure, reducing the weight, but also greatly improving the reliability.

wind power bearing the surface cleaning method:

Non-standard and standard bearing sizes bearing structure is not on the table belongs to the non-non-standard bearing, which is produced according to customer requirements such as bearings. Non-standard internal and external 49 standard 50 like nothing else. That 49 is a non-standard size structure bearing‍ according to the customer that you have to book than otherwise you know that 49 is a hybrid or 50 GB.

There is not the same structure. For example, some multi-ball roller. Or less. This rare

Generally be universal full name is non-standard bearings

Non-standard bearings rust methods

1, surface cleaning: cleaning must be in accordance with the nature of the surface rust and the prevailing conditions, the appropriate method is selected. Commonly agricultural bearings‍ used solvent cleaning, chemical treatment and mechanical cleaning method to clean.

2, the surface was cleaned by washing by filtration and dried in the drying compressed air, or a dryer 120 ~ 170 ℃ is dried, dry clean gauze can also be used.

Second, anti-rust oil coating method:

1, soak method: Soak in some small items using anti-rust oil, allowed a layer of rust on the surface adhesion method grease. The film thickness can be achieved by controlling the temperature or viscosity rust preventive oil.

2, brush or spray for NA immersion outdoor construction equipment or special shape products, we should pay attention when brushing does not produce accumulation, but also pay attention coated to prevent leakage.

3, spray some large rust-proof material coated with oil offshore crane bearing‍ immersion method can not be used, usually with about 0.7Mpa pressure spraying compressed air filter in the air cleaner place. Spray application of anti-rust oil or solvent dilution thin rust oil, but it must be used to improve fire safety and labor protection measures.

wheel bearing Introduction and current situation of marine cranes

Marine cranes are executed in the marine environment in a special crane transport operations, mainly for the transfer of cargo between ship transport, maritime supply, delivery and recovery of important tasks, such as underwater equipment. Special application to offshore marine crane control environment is a big challenge. On the one hand, similar to the land-based cranes of various under-actuated devices, the mobile crane bearing‍ need to control the swing of the load during transport produce to ensure its accuracy and transport efficiency; on the other hand, because of this crane is fixed on the ship and other sports platform, the platform itself Games have a strong impact on the load movement, and in many cases, the load lifting and landing point of the movement and the movement of the crane itself is inconsistent. Specifically, in the course of their work, the crane ship and the ship will receive pitching with the waves, roll and heave, these movements will cause the load to occur swing; especially in the lifting process, easily lead to such movement of the ship has been suspended since the load again collided with the deck, or to have been put down but not yet out of the hook load vacant again, these will threaten the safety of operations. Especially during inter ammunition supply ship, the coupled motion can cause very serious consequences.

Marine crane control is divided into lower hull motion control and suppress the impact of vertical lateral load anti-swing swing two ways. For vertical control, the commonly used agricultural bearings‍ method is to connect the mechanical structure of the crane on board by receiving ship, and the perception of its relative motion, so sling length change and receiving ship heave motion synchronized to the relative movement of the two ships to be compensated, complete landing transport loads on this basis. This method of mechanical structure cranes have special requirements, but also have a greater quality of lifting restrictions. Other scholars lifting equipment for underwater dynamics modeling process, they consider the sling flexibility and hydrodynamic and other factors, and based on the feedback linearization method were designed trajectory tracking and disturbance rejection controller. Feedforward-based synchronization techniques to compensate for the waves heave motion effects, and ultimately into the water on the course load to achieve precise control. In recent years, the lateral anti-sway control has also been a lot of attention. In order to strengthen the sling and the load swing control, on the part of the crane installation Malwith agencies that joined in the middle of the rope sling traction to reduce swinging loads. For marine crane with a special mechanism that, in recent years, made ​​a variety of continuous modeling and control methods. However, such restrictions bodies crane system on a larger working space, reduces the flexibility of the original system. For this reason, many studies without changing the mechanical structure of the crane based on the use of a variety of sensors to obtain the ship, crane, conical bearing‍ the motion information of the load, and to suppress the oscillation of the load during transport through the rational design of arm motion controller. Among them, the use of command shaping technology, the pitching rotation is controlled crane jib, and verified on the pitch and the hull is modeled arm movement, and through the feedforward and feedback control on the part of small-scale experimental platform strategies to inhibit the combination of unilateral load swings upward. Position feedback control using the time lag method, two-dimensional by manipulating pitch and swing arm to reduce the load swing angle. Laboratory design of a control scheme based on multi-sensor data fusion, which by controlling the movement of the crane to compensate for ship motion, to better suppress the swing of the load.

LYHY deck crane bearing Part Derrick

By the boom, lifting column (or lifting mast), rigging and winches (or winch) and other components (see Figure derrick map). Derrick is a traditional boat landing equipment, although many ropes, operational problems, but the structure is simple, easy to manufacture, low cost, is still widely used.

Single-lever operation and axial bearing‍ dual lever

Boom device with loading and unloading cargo, a single lever operation and dual lever in two ways. Single-pole loading and unloading operations are carried out with a boom, boom lift cargo after pulling lanyard boom swing together with the goods overboard or cargo hatch, and then down the goods, then boom back to the original bit, so from operations. Every time when loading and unloading boom swing with lanyard, so inefficient, labor-intensive. Dual lever with two booms, one placed over the cargo hatch, and another extending outboard, two boom with a lanyard attached to a working position. Two Crane boom with cable is attached to a hook. As long as were close, put two cargo runners, you can mobile crane bearing‍ unload the cargo from the ship to the dock, or the goods from the loading dock to the boat. Dual lever handling efficiency is higher than single lever operation, labor intensity is also lighter.

wheel bearing Marine Cranes Dual topper derrick boom means and Hebert

Improved boom device was later arise. Dual topper derrick boom device is operated by a single lever improvements made, the device only cargo runners and about two separate topper. Crane boom by a winch and two topping winch to manipulate, easy to operate, high working efficiency. Hebert derrick boom device by double-lever operation improvements made​​, the device has a cargo winches, extremely heavy winch cable and lanyard. agricultural bearings‍ With the winch boom may soon put in any position. While also pointing put cargo lifting and fall within the working radius of the boom to improve handling efficiency. This is an important step towards fully automated cargo handling forward.

Deck crane

Set machinery in the ship deck. This compact crane structure, the ship has more deck area available, less impact on the bridge upstairs sight. Deck cranes easy operation, high working efficiency, and flexibility, before the job is no tedious preparatory work widely.

Deck cranes commonly used fixed rotating cranes, mobile cranes and gantry cranes rotation. Transmission power transmission and electricity - two hydraulic drive.

Fixed rotating crane

This crane most widely used, can be used axial bearing‍ alone or in pairs in the starboard job. Weight is generally 3 to 5 tons. In the multi-purpose boat, requires a single crane can lift a 20 ft container, twin-lift can lift 40 feet container (30 tons), its starting weight of up to 25 to 30 tons.

wind power bearing Mobile rotating crane

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In the span of a large crane loading and unloading requirements, but I hope not too long crane boom situation, often using mobile rotating crane. Mobile cranes along the ship's self aligning bearing‍ rotation and longitudinal movement of two kinds of lateral movement.

Gantry Cranes

This crane is a full container ship (see container ships) and load barges are widely used, usually four-legged type or C type. There is an extendable boom, lifting rungs and a removable tray and cab. Higher levels of bridge girders stowed on the deck of the container, and automatic positioning device, when shipping containers can be placed exactly fall in separate compartments or containers stacked on deck. The number of gantry crane barge load containers on board more than that, from the weight of up to several hundred tons.

Other handling machinery

There are lifts, elevators and conveyors. Boat lift is a vertical movement of the machine along the rails for lifting and lowering between each deck cargo use. Such as multi-use lift decks connected to the delivery of goods on the ro-ro. There lift scissor on ro-ro, chain and several species, its length is 9 to 18.5 meters, agricultural bearings‍ a width of 3 to 5 meters. Also installed on some carrier barge loading and unloading cargo barge lift, but lifting capacity is much greater than on the ro-ro ships. Hoist is larger in the vertical direction or inclined direction of the continuous movement of goods. Conveyor is a little slope in the horizontal direction or the direction of the continuous delivery of goods. Both mechanical dump is used in loading and unloading of a ship or boat through the side door.

wind power bearing Repair and maintenance

How wheel bearing repair and maintenance
Automotive wheel bearings is important to walk parts. Wheel bearings reduce friction chassis bears during the operation, the task of maintaining normal driving the car. If a wheel bearing failure, may cause the phenomenon of noise, bearing fever, especially the front wheel is more obvious, easily lead to runaway direction dangerous phenomenon. Therefore, the wheel bearings must be maintained on schedule.
Check wheel bearings
(1) Check the tightness of wheel bearings, reali slim bearings first inspected the car at one end of the wheel hub axle set up, with the support car stool, wood and other appliances to cover the car a good car safely stand.
(2) Rotate the wheel a few laps examined to see whether the smooth rotation, if there is no abnormal noise. If the rotation is not smooth and there is friction sound, indicating that the brake part is not normal; if there is no noise, when the rotation is not smooth and tight loose, indicating that the bearing part is not normal. When the above irregularities should dismantling the hub. For a small car, check wheel bearings, with both hands up and down the side of the tire, the tire pulled his hands back and forth, repeat several times. If normal, then there should be no Songkuang and arrest feeling; If there are obvious Songkuang swing feel, should be overhauled wheels.
(3) Check the braking areas. Usually when checking wheel bearings, with wheel brake inspection, if there are traces of oil inside of the tire, probably the brake cylinder or brake lines caused by the oil spill, it is timely to identify the reasons, be excluded.
Wheel Bearing Maintenance
Before removing wheels, wheel maintenance should do the preparatory work, the car parked and set up axles, in order to ensure the maintenance of security operations.
(1) Remove the hub shaft head decorative spherical plain bearings cover, dust cover;
(2) Remove the wheel nuts and tires, be careful not to bruise the tire bolt threads. If disc brakes, the brake should be removed, and then used pliers to remove the lock ring or locking pin.
(3) with a special tool to remove the wheel hub;
(4) scrape bearings, journal and hub cavity of the old grease, cleaning wheel bearings and journal with detergent and wipe dry with a cloth, wipe with a cloth wheels last cavity.
(5) Check the wheel bearings and bearing races, found cracks, fatigue spalling and loose roller bearings and other phenomena, replace bearings. If you find pitting on the bearing race, it should replace the bearings.
When cope with the situation (6) Check the bearing bore and the journal, with the gap should not exceed 0.1Omm measuring journal, should be in the upper and lower parts of the vertical ground (where the largest wear parts) measurements. If used with the gap exceeds the limit, replace the bearing, so back to normal with the gap. Burr is not allowed to play, pitting the journal to narrow the gap.
(7) Upon completion of all parts meet the requirements, the inner bearing grease after release hub.
When (8) grease the bearing cavity attention should be squeezed into the bearing grease until grease to date to emerge self aligning bearings from the other side of the bearing. In the hub and shaft cranial cavity Apply a thin layer of grease to make it play a role in rust. Note that the hub cavity do not apply too much grease, otherwise it will affect the cooling and braking.
(9) the hub and the outer bearing back onto the journal, hand-axis head adjustment nut, and then use the required shaft torque wrench to tighten the adjustment nut. After tightening the nut, turn the wheel a few times to be around to see the bearing installation; on the other hand, by turning the bearing and seat properly fit. At this time bearing tightness appropriate wheels to rotate freely and not feel the axial clearance.
(10) Finally, in order to install the locking plate, fixing nut, tires, dust cover and decorative cover and other parts.
(11) wheel bearings adjusted, with some mileage (about 1Okm), stop and check for swab touch wheel temperature, if fever, is caused by the bearing adjustment too tight, should be re-adjusted appropriately relaxed bearing tightness.
Non-normal wheel bearing damage causes
In the repair process, often found that some cars have a greater driving noise, no abnormal tire wear inspection, turn the wheels on the lift no abnormal sound. This phenomenon is often caused by abnormal wheel bearing damage caused by the so-called non-normal means of bearing mobile crane bearing damage caused by the installation of. Automotive wheel bearings are generally double row ball bearing, at the time of installation of the bearing installation if you use a hammer percussion, or when the bearing is installed into the bearing inner race of the bearing by pressing installed, will cause one side of the bearing raceways damage. Noise when the vehicle is traveling, and when the wheelie is better since the raceway side, and therefore noise was heard. Correct installation operation is the key to long life bearings.

wind power bearing Miniature Bearings Introduction

Refers to metric series miniature bearings, diameter less than 9mm; Inch Series, diameter less than 9.525mm in all kinds of bearings! The main materials are carbon steel, bearing steel, stainless steel, plastics, ceramics, etc., which can be done a minimum internal diameter of 0.6mm, general internal diameter of 1mm more.

2 Features

In the ultra-small aperture miniature bearings, agricultural bearings‍ deep groove ball bearing type miniature metric of 68 series, 69 series, 60 series, Inch R series of six kinds, on this basis, can be divided into steel dust band ZZ cover bearing series, with RS rubber seals series of miniature bearings, Teflon bearing seals series and with flange wall series and so on.

Three main purposes

Miniature Bearings for all types of industrial equipment in the field, small rotary motor high-speed low-noise, such as:

Office equipment, micro-motors, instrumentation, laser engraving, small clocks, soft drive, pressure rotor, dental drills, hard drive motors, stepper motors, VCR drum, toys, models, slewing bearing‍ computer cooling fan, cash registers, fax machines etc. related fields.

Miniature Bearing Failure

About 40% of the failures miniature ball bearings are contaminated by dust, dirt, debris and corrosion. Pollution is usually caused by improper use and poor use of the environment, it can also cause problems torque and noise. Miniature bearing failure by the environment and pollution generated can be prevented, but by simple visual observation can determine the cause of such failure. As long as the reasonable use and install, miniature bearings erosion is easy to avoid. Erosion is characterized in miniature bearing ring raceway indentations left by shock loads or incorrect installation produced. Erosion usually occurs when the load exceeds the material yield limit. If not properly installed so Other bearing‍ that the load across a miniature bearing ring will produce erosion. Also miniature bearing ring indentation on noise, vibration, and additional torque.

wheel bearing Wheel bearing (hub bearing)

Wheel bearing (hub bearing) primary role is to load and for the rotation of the hub to provide accurate guidance, both axial load and radial load, is a very important component. wind power bearing‍ Traditional automotive wheel bearing is composed of two tapered roller bearings or ball bearing combination, bearing installation, oiled, sealed and adjust the clearance is carried out in the car on the production line. This structure makes it difficult in a car assembly plant, high cost, poor reliability, and maintenance car maintenance, but also the need for bearing cleaning, oiling and adjustment. Developed on the basis of the hub bearing unit is the standard angular contact ball bearings and tapered roller bearings on, it will be two sets of bearings as a whole, with good assembly performance can be omitted clearance adjustment, light weight, Full complement cylindrical roller bearings‍ compact structure, load capacity large, sealed bearings can advance into the grease, hub seals and maintenance advantages omitted from the outside wheel, has been widely used in cars, and in the truck also has a tendency to gradually expand the application.

LYHY deck crane bearing Dual topper derrick boom means and Hebert

Improved boom device was later arise. Dual topper derrick boom device is operated by a single lever improvements made, the device only cargo runners and about two separate topper. Crane boom by a winch and two topping winch to manipulate, easy to operate, high working efficiency. Hebert derrick Triple row roller slewing bearing‍ boom device by double-lever operation improvements made​​, the device has a cargo winches, extremely heavy winch cable and lanyard. With the winch boom may soon put in any position. While also pointing put cargo lifting and fall within the working radius of the boom to improve handling efficiency. This is an important step towards fully automated cargo handling forward.

Deck crane

Set machinery in the ship deck crane bearing‍. This compact crane structure, the ship has more deck area available, less impact on the bridge upstairs sight. Deck cranes easy operation, high working efficiency, and flexibility, before the job is no tedious preparatory work widely.

Deck cranes bearing ‍commonly used fixed rotating cranes, mobile cranes and gantry cranes rotation. Transmission power transmission and electricity - two hydraulic Thin section bearings‍ drive.

Fixed rotating crane

This crane most widely used, can be used alone or in pairs in the starboard job. Weight is generally 3 to 5 tons. In the multi-purpose boat, requires a single crane can lift a 20 ft container, twin-lift can lift 40 feet container (30 tons), its starting weight of up to 25 to 30 tons.‍

LYHY deck crane bearing Crossed roller bearing assembly points and quality measures

Thin-walled cross roller bearings according to its structure, the assembly stage needs to grasp the bearing clearance control, rotary accuracy and stability of 3 points, cross roller bearings belong to special bearings with high precision, is mainly used in CNC machine, robot arm, as well as medical and Full complement cylindrical roller bearing‍ military equipment, which are double row roller in a 45 degree tilt angle roll cross distribution channel, can maintain high rigidity on the roller and raceway contact line, but also because of a 45 degree tilt angle raceway can be uniformly load of axial and radial bearing, perfect overturning or torsional moment; in addition, cross roller bearings with negative clearance design and pre tight, can high rigidity bearing guarantee (compared with traditional models, rigid increase 3~4 times) and high precision, cross roller bearings precision Luoyang Boying bearing is in P5 above, basic accuracy of P4, P2, belongs to high precision bearing:

1 crossed roller bearing clearance control bearing slewing bearing‍ production processes in the two process to ensure the bearing clearance, a bearing end grinding, roller bearing sleeve so need beforehand medium size of test equipment, test equipment with rotary bearing is smooth, the negative clearance has a slight pressing feeling, can ensure the roller and the raceway with clearance at around 0.01mm, preparing for the next assembly; second procedures for fitting test equipment, the bearing does not install the isolation block or holder of test equipment, there are 5 groups of roller for choice, according to the assembly member feel and a dial indicator measuring judgment clearance is required, if don't be by replacing the roller and raceway grinding to finish the match, this method can also be used in the production of the turntable bearing YRT, is commonly used in bearing production method, just cross roller bearings are precision bearing, clearance requires precise control;

2 rotary accuracy and stability control; through production practice experience for many years we know, rotary precision cross roller bearings and YRT turntable bearing mainly, and the single direction thrust ball bearing‍ raceway quality and deformation, therefore, all bearing before shipment is half finished product assembly, prevent long after placing deformation, and thin-walled cross roller bearings in the grinding time by tempering 2 times treatment, ensure the material stress release caused by deformation of the risk to a minimum; the actual assembly of a rotary impeded, the bearing cleaning, check whether there is damage raceway, then the accuracy of roundness and flatness.

Measuring, Cengcengbaguan to ensure the bearing quality.‍