deck crane bearing Crane refers

Crane refers to within a certain range vertical lifting and carrying heavy loads of multi-level action lifting machinery. Also known as the crane. Belong material handling machinery. Crane's work is characterized by intermittent exercise to do that in a work cycle reclaimer, angular contact bearing‍ transport, unloading and other movements of the corresponding bodies are alternately work, development and use of cranes on the market more widely. 

Crane hoisting mechanism mainly run institutions, luffing mechanism, slewing mechanism and metal structures. Hoisting mechanism is the basic working body cranes, moThin section bearings‍ stly composed by hanging system and winch, there are lifting weights through the hydraulic system. Run institutions to adjust the vertical or horizontal transport of heavy cranes working position, usually by the motor, reducer, brake and wheel components. Luffing mechanism is equipped with only the jib cranes, jib looked up when the amplitude is reduced, the amplitude increases when bent, sub-balanced and unbalanced luffing luffing two. Slewing mechanism to make the boom swing is determined by the drive and slewing ring device components. Crane metal skeleton structure, the main bearing member such as a bridge, boom and Full complement cylindrical roller bearings‍ mast-shaped structure may be a box or a truss structure, the structure may also be a web, and some can be used as the supporting steel beams.

deck crane bearing ball bearings Product Features

Main radial load, but can withstand axial load is small. (Shell) of the axial displacement limited clearance limits, with self-aligning performance, allowing the peripheral conditions of relatively little inclination to work for bearing seat hole can not be strictly deck crane bearing‍ guaranteed concentricity of the part.

Aligning ball bearing structure forms

Aligning ball bearing assembly with a dust cover and with a ring already populated when the right amount of grease should not be heated before installation do not wash, use the process without re-lubrication, adapt operating temperature - 30 ℃ to + 120 ℃ between. Aligning ball angular contact bearing‍ bearings main purposes: for precision instruments, low noise motors, automobiles, motorcycles and general machinery, the machinery industry, the most widely used type of deck crane bearing.                                                                                                        

wind power bearing Technical Requirements

Classification Summary Rolling classification of rolling bearings: Rolling bearing load bearing structure type classification 方向公 said contact angle is agricultural bearings‍ divided into different radial bearings are mainly used to bear radial load Rolling nominal contact angle nominal contact angle divided into radial contact bearings nominal contact angle heart to heart contact bearings wind power bearing Full complement cylindrical roller bearings‍ nominal contact angle greater than radial bearings thrust bearings are mainly used to bear axial load   Rolling nominal 2002: Machine.  ‍                                                                                                                                                                      

wheel bearing load bearing

 By Rolling structural type classification (1) can bear the load bearing their direction or nominal contact angle, divided into: a) radial bearings ----- mainly used to bear radial load bearing, nominal contact angle from 0 to 45. Press nominal contact angle is different, is deck crane bearing‍ divided into: radial contact bearings ----- nominal contact angle is zero radial bearings: Radial angular contact bearings ----- nominal contact angle greater than radial bearings 0-45 of . 2) thrust bearing ----- mainly used for axial load bearing, the nominal contact angle greater than 45-90. Press nominal contact angle is divided into different: Axial contact bearings ----- nominal contact angle of 90 thrust bearings: Axial angular contact bearing‍ angular contact bearings ----- nominal contact angle greater than 45 but less than 90 of the thrust bearing. (2) the type of rolling element bearing according divided into: 1) rolling the ball as the ball bearing -----: 2) rolling the roller bearings for the rollers -----. Thin section bearings‍ Roller Bearing press roller type, is divided into: cylindrical roller bearings ----- rolling body is cylindrical roller bearings, cylindrical roller ratio of length to diameter of less than or equal to.                                                                                                             

deck crane bearing needle roller bearings

 Rolling body is needle bearings, needle length to diameter ratio greater than 3, but a diameter less than or equal to 5mm; tapered roller bearings ----- rolling body is tapered roller bearings; spherical Roller bearings eleven rolling body is spherical roller bearings. (3) marine crane bearing‍ whether the bearing aligning their work is divided into: 1) deck crane bearings ----- raceway is spherical shape, able to adapt to angular deviation and angular movement between the two raceways of the bearing axis ; 2) non-aligning bearing (rigid bearing) ----- able impedance path between roller bearing axis angular offset. (4) according to the number of rows of rolling elements bearings, divided into: 1) single row bearings ----- has a list high precision bearings‍ of rolling element bearings; 2) ----- double row bearings have two rows of rolling element bearings; 3) ----- multi-row bearings with more than two rolling element bearings, such as three, four bearings. (5) whether the separation bearing their part, are divided into: 1) separable bearings ----- bearings with separable components; 2) can not be separated after the final bearing ----- bearing supporting rings are freedom can not be arbitrarily separated bearings. (6) Taper roller bearings‍ bearing their structure and shape (if no filling slots, without inner and outer rings and structural shapes, ribs, and even whether the cage, etc.) can also be divided into a variety of structural types.                                                                                                                

wind power bearing rolling bearing

rolling bearing outside diameter size classification bearing their size, divided into: (1) miniature bearings ---- nominal diameter size range of 26mm or less wind power bearing‍; (2) a small nominal outer bearing ----- diameter size range of 28-55mm bearings; angular contact bearing‍ (3) small and medium sized bearings ----- nominal diameter size range of 60-115mm bearings; (4) in the large bearing ----- nominal diameter size range of 120-190mm bearing (5) large bearing ----- nominal diameter size range of 200-430mm bearings; (6) large bearings ----- nominal diameter size range of 440mm or more bearings. Rolling numerous types and sizes, in order to facilitate the design and selection, standard specifies the code represented by the rolling bearing type, size, structure, characteristics and tolerance level and so on. Thin section bearings‍ (Alternative GB272-88), Rolling Code constitutes as shown in the table. Rolling Code code representation purposes: to characterize the structure of the rolling bearing, size, type, precision, code constitutes: Front code - said bearing subassembly basic code - said after bearing types and sizes, such as the main feature set code - indicates the accuracy of the material bearing the characteristics of diameter code: ID Code × 5 = internal diameter special case: d = 10 12 15 17 code is: 00010203 size series Code: used to express the same outside diameter and width of the inner deck crane bearing‍ diameter but different bearings, see right. OD Series Code: special light (0,1), light (2), middle (3), weight (4) Width Series Code: normal width to "0", usually not marked. But for tapered roller bearings (3 classes) and spherical roller bearings (class 2) can not omit the "0"                                                  

wheel bearing Job requirements

For harsh heavy loads, working conditions or special requirements for sealed bearings configuration, you can use the built-in contact-type seals Spherical roller bearings. The bearing dimensions are identical and non-sealed bearings, in many cases can replace the non-sealed Other bearing‍ bearings. Allow aligning angle of 0.5 °, an operating temperature of -20 ℃ ~ 110 ℃. Inner bearing has filled the right amount of lithium-based grease rust, grease can be added according to user requirements. Depending on whether the wall and the inner ring with cage, can be divided into C-type and CA-type two basic types, C-type wheel bearings are characterized by inner wall and the use of steel stamping cage, Series super thin section bearings‍ CA-bearing characteristics compared to both sides of the inner wall and the use of the car solid cage. These bearings are especially suitable for heavy work load or vibration loads. Spherical roller bearings have two raceways in the inner and raceways between spherical outer ring, equipped with a drum-shaped roller bearings [2]. The outer ring raceway curvature center and bearing center line, so has the same self-aligning ball bearing self-aligning feature. When the shaft, shell deflection occurs, you can automatically adjust load and axial load in two directions. Radial load capacity, for a heavy load, impact load conditions. Inner diameter is tapered bore bearings can be installed directly. reali slim bearings‍ Or use an adapter sleeve, remove tube installed in the cylinder axis. Cage with steel stamping cage, forming polyamide cage and copper alloy machined cage.

deck crane bearing Plain Bearings

Plain Bearings mainly by an inner and an outer spherical plain bearing outer ring has a special structure within the sphere. Can withstand a greater load. Joint bearing structure than simply rolling bearing, which is mainly composed of an inner and outer sphere within worm gear speed reducer‍ a spherical outer ring. Bearings are generally used for lower-speed swing motion (ie angular motion), the sliding surface of a spherical shape, but also for tilting movement within a certain range of angles (ie, aligning movement), different heart in supporting shaft and shaft housing bore large degree, still working properly.

Spherical plain deck crane bearing‍ can withstand a greater load. According to their different types and structures that can withstand the radial load, axial load or radial, axial joint load. Since the outer spherical surface of the inner ring inlaid with composite materials, so the bearing at work can produce self-lubricating. Generally used for slower swing movement, and low-speed rotation, but also Deep groove ball bearing‍ for tilting movement within a certain range of angles, when different supporting shaft and shaft misalignment large shell hole, still work. Self-lubricating bearings used in water conservancy, specialized machinery and other industries.                                                                        

wind power bearing Analysis of deep groove ball bearing quality

Compared with sliding bearing, deep groove ball bearing and sliding bearing, general conditions of deep groove ball bearing, the rolling efficiency and hydrodynamic bearing lubricated bearings, but a mixed lubrication bearing to the high number of;

1, ability to withstand wind power bearing‍ the impact load is poor;

2, the radial clearance is relatively small, angular contact radial bearings can be preloaded available pretightening force to eliminate the clearance, high running precision; high speed heavy load bearing life is low;

3, for the same size of the shaft diameter, bearing width smaller than the sliding bearing, the axial structure of machine is compact; vibration and noise;

4, most of the rolling bearing can be both radial and axial load, so the bearing assembly has the advantages of simple structure; the radial size than the sliding bearing;

5, the consumption of lubricant, which is taper roller bearing‍ convenient for sealing, easy maintenance;

6, do not need useful nonferrous metal;

7, a high degree of standardization, mass production, low cost;                                                                  ‍

wheel bearing Judgment bearing will use again

Judgment bearing will use again, to bearing damage degree, the machine performance, importance, operating conditions, such as checking cycle later decided. Check the results, if it is found that the bearing damage and abnormal situation, hurt a section to find out the reason, wheel bearing‍ countermeasures. In addition, the inspection results, if there are some defects in it, the bearing can not be used, need to replace new bearing.

A. inner and outer ring, rolling body cage, in which any cracks and debris.

B. inner and outer ring, rolling body which any split.

C. raceway, rib, rolling card significantly hurt.

D. retainer wear or loosen rivets.

E. raceway surface, rolling rust and bruises.

F. surface of rolling, rolling a significant indentation and trace.

A creep of G. inner self aligning ball bearing‍ diameter of surface or outer diameter.

H. thermal discoloration.

I. grease sealed bearings seals and shields to serious damage.                                         ‍

deck crane bearing the main reason for the formation of the spiral line

1 grinding wheel dressing is bad, not chamfered corner, without the use of cooling liquid dressing;

Track 2 table guide lubrication oil too much, cause the work station floating;

3 machine tool accuracy is not good;

4 the grinding deck crane bearing‍ pressure and so.

(two) with the formation of the spiral line

1.V guide not good rigidity, the grinding wheel edge offset, just contact with the work surface;

2 dressing noisy round table reversing speed is not stable, the precision is not high, the grinding wheel is a slightly less edge trimming;

The 3 workpiece itself poor rigidity;

4 wheel is broken too peeled off the sand and angular contact bearing‍ grinding of iron deposition in the grinding wheel on the surface, this should be trimmed grinding wheel with cooling water rinse or wash clean;

5 wheel dressing is not good, local projection etc..

Analysis of causes of bearing grinding traces generated.                                   ‍

wind power bearing examination and judgment

In order to determine the bearing removed can re-use, to check on the accuracy of rotation accuracy, internal clearance, and the mating surfaces, raceway, wind power bearing‍ cage and sealing ring.

About the examination results, can be judged by the bearing or bearing are used in.

Criteria based on the mechanical properties and the important degree and the inspection cycle and different. If the following injury, bearings shall not be re used, must be replaced.

1) bearing parts of the fault and defect.

2) the raceway surface Angular contact ball bearings‍ rolling surface stripping.Show cross spiral line traces the emergence of such traces is mainly due to the bus straight wheel of existence, bump phenomenon, when in grinding, the grinding wheel and the workpiece is only part of the contact, when the workpiece or the grinding wheel reciprocating motion after several times, cross spiral line and the naked eye reproduced on the workpiece performance will be taper roller bearing‍ observed. The helix pitch and workpiece speed, rotational speed of workpiece size, but also with the wheel axis and the guide rail is not parallel to the working table.     

wheel bearing Regular maintenance and inspection of bearing

Play and its performance to maintain long-term to make the bearing fully, must cogent do regular maintenance (check). Through regular check for proper, do wheel bearing‍ early detection of failure, to prevent accidents, is very important to improve the productivity and economy.

1, cleaning

Remove the bearings when the examination, using methods such as photographic appearance record. In addition, to confirm that the remaining amount of lubricant and lubricant sampling, and then cleaning bearings.

A bearing cleaning, rough cleaning and washing, and the metal frame at the bottom of the container placed on the use of.

B, rough when Taper roller bearings‍ washing, use the brush in the removal of grease or oil adhesion. At this point if oil bearing, attention will be due to foreign bodies such as damage the rolling surface.

C, sperm washing, slowly rotating bearings in oil, be careful.

Cleaning agents are commonly used as neutral without water diesel or kerosene, sometimes using temperature as needed, such as lye. No matter what kind of cleaning agents, are often self aligning ball bearing‍ filtered clean.

After cleaning, immediately on the bearing coating antirust oil or antirust grease.                                                                  ‍

deck crane bearing Bearing clearance selection technique

Clearance is an important factor in rolling bearing can work normally, divided into the axial clearance and the radial clearance. Select the appropriate clearance, can make the load in the bearing rolling body between the reasonable distribution; can limit axis (or shell) of the axial and radial deck crane bearing‍ displacement, ensure the rotating precision of shaft; the bearing work at a prescribed temperature; reduce the noise and vibration, to improve the bearing life. Therefore. In the selection of bearings, bearing clearance, must choose the appropriate.

Selection of bearing clearance, should consider the following aspects:

1, the bearing working conditions, angular contact bearing‍ such as load, temperature, speed etc.;

2, on the use of performance requirements (bearing rotation accuracy, friction torque, vibration, noise);

3, the bearing and the shaft and housing bore is in interference fit with the lead to reduction of bearing clearance;

4, when the inner and outer rings of bearing, the temperature difference caused reduction of bearing clearance;

5, because the expansion coefficient of shaft and housing materials of different, resulting in the decrease or increase of bearing clearance.

6, according to experience, the most suitable for ball bearing clearance work to nearly zero; roller bearing should keep a small amount of clearance. At the request of supporting rigid good parts, Thin section bearings‍ bearing preload has certain value. Here is particularly pointed out that, the so-called clearance refers to the bearing clearance, in the actual operating condition. There is also a play called the original clearance, refers to the bearing without clearance. The original clearance than installation clearance. We choose to play, mainly is to choose appropriate clearance.                                                                           

wheel bearing Turntable bearing load

Turntable bearing load on the effects of using precision

To maintain a good state of bearing and the use of performance, maintenance, repair, in order to prevent accidents, ensuring the reliability of operation, increase production, wheel bearing‍ economy. To maintain the best operating conditions of the corresponding mechanical operating standards, regular inspections to maintain in good condition and performance of bearings, maintenance, overhaul, in order to prevent accidents, ensuring the reliability of operation, increase production, economy. To maintain the best operating conditions of the corresponding mechanical operation standard, check regularly. Examination content includes monitoring running state, supplement or Single Row Ball Slewing Bearing‍ replacement of the lubricant, periodic disassembly inspection. As a matter of maintenance in operation, a rotary voice, YRT turntable bearing vibration, temperature, the state of grease and so on. Remove bearing overhaul, the first recorded appearance of the bearings, confirm the remaining amount of lubricant, after sampling inspection by the lubricant, cleaning bearings.

On the basis of efficiency for turntable bearing load on the rotation of the ferrule, working condition, the load ring bear is divided into a fixed load, dynamic load and rocking out load three.

A. fixed load synthetic radial load by raceway parts Full complement cylindrical roller bearings‍ undertaken, and delivered to the shaft or housing appropriate parts of the corresponding range wind appearance. The load bearing in Sweden called fixed bearing load. Unique local fixed load is radial load and the synthesis of relatively static ring. Assume the fixed load. General can choose loose fit.

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deck crane bearing size and Bond

grinding stainless steel, general grinding wheel with No. 36, No. 46, No. 60 middle size is appropriate, the coarse grinding, the No. 36, No. 46 grain size, with 60 grit grinding. deck crane bearing‍ In order to be used for coarse grinding and fine grinding, the No. 46 and No. 60 grain size.

grinding stainless steel wheel has high strength, in order to bear a larger impact load. Vitrified heat-resistant, resistant to corrosion, wheel it made can keep good cutting performance, Angular contact ball bearings‍ moisture resistance, porous, binder for making grinding stainless steel wheel. Grinding tolerance

Concentrated nitric acid stainless steel inner hole, the resin bond grinding wheel manufacturing.                                                       ‍