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.