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.

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.