After 3 to 5 years of use of the motor, its bearings may be damaged. Therefore, in the overhaul, inspection and maintenance of bearings is an essential step.
When the bearing is damaged, the motor will show overheating, abnormal noise, and even cannot run. The primary way to judge the bearing status is to manually rotate the outer ring quickly and observe its movement. A good bearing should rotate smoothly, without obvious vibration or swing, and the rolling sound is slight. The bearing in question will make a noise, accompanied by abnormal vibration, stop as sudden as a sudden brake, and even reverse the phenomenon.
Fault cause analysis
Bearing damage may be caused by a variety of factors, including but not limited to insufficient lubrication, foreign body intrusion, improper installation or excessive load for a long time.
Maintenance and repair measures
For bearing problems, the following maintenance steps can be taken:
Cleaning: Thoroughly clean the bearing to remove dirt and old lubricating oil.
ust removal treatment: for surface rust, wipe with emery cloth and clean with gasoline; Mild rust on the ball or track usually does not affect use, but for serious rust, it is necessary to soak in kerosene and remove the rust by manual rotation, and then clean again.
Adjust parallelism: If the inner and outer rings of the bearing are not found to be parallel, ensure that they are properly aligned by adjusting the end cap bolts.
Correction flatness: If the two ends of the bearing are not on the same plane, it can be corrected by turning the inner cover opening or adding an O-shaped washer.
Check the axial clearance: check and maintain the appropriate axial clearance according to the specific requirements, and replace the new bearing if the limit is exceeded.
Replacement of irreparable bearings: Once the bearing is out of round, broken or seriously worn, it should be replaced with a new bearing in time.
Through the above methods, the common fault problems of motor bearings and rotating shafts can be effectively solved to ensure the normal operation of the equipment.
