Bearings often encounter the problem of overtemperature during use. This abnormal situation similar to "fever" is the most common and harmful fault type in various mechanical equipment. If the cause is unknown and improperly handled, it will shorten the service life of the bearing, increase maintenance costs, and even cause bearing burnout. Therefore, quickly determining the cause of high temperature and taking appropriate measures to solve it is an important guarantee for the continued safe operation of the equipment. There are many reasons for the excessive temperature of the bearing, and the common ones are as follows.
1. Poor lubrication. Lubrication has an important impact on the friction, wear, vibration, etc. of the bearing. Good lubrication is a necessary condition to ensure the normal operation of the bearing. According to statistics, about 40% of bearing damage is related to poor lubrication. The main effects of lubrication on bearings include: reducing friction and wear, preventing metal corrosion, preventing foreign matter from intruding, playing a sealing role, releasing friction heat, preventing the bearing temperature from being too high, and extending the service life of the bearing.
2. Improper installation. Improper installation is another important reason for bearing heating. The correct installation of the bearing directly affects its service life and running accuracy. Therefore, the center line of the shaft and the bearing hole should coincide during installation. If the bearing is not installed correctly, it will lead to low precision, large deviation between the bearing rotation center and the hole axis center, torque during rotation, etc., causing the bearing to heat up, wear or the cage to get stuck. In addition, improper bearing installation will also cause vibration and abnormal noise, and increase temperature rise.
3. Insufficient cooling. Insufficient cooling is usually manifested as pipe blockage, improper cooler selection or installation, poor cooling effect, etc. For example, cooler scale blockage on the lubrication pipeline will cause the cooling effect to deteriorate, especially in summer or high temperature working environment. To prevent this problem from happening, it is usually necessary to descale the cooler before summer every year.
4. Untimely inspection and replacement. If the bearing is found to be severely fatigued, rusted, worn, cracked or too noisy to be adjusted, if it is not replaced in time, it will cause the bearing to heat up, emit abnormal noise, vibrate, etc., thus affecting normal production.
