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What are the factors that cause motor bearing damage

wallpapers Industry 2020-10-26
 
1. There are cracks and peelings on the inner and outer rings, balls, and holders of the bearing. This is caused by the improper cooperation between the bearing and the rotating shaft and the strong sleeve.
2. The ball, clamp, shaft ring and other parts of the bearing turn blue, and the high-speed operation is adjusted without heat dissipation, which causes the parts to be heated and oxidized, which is caused by severe oil shortage.
3. Concave bead marks appear in the raceway, and the adjacent vacancies are uneven. This is caused by the fact that the equipment is strictly prohibited or the outer ring of the bearing is directly hit with a hammer, the transmission belt is too tight, and the coupling equipment is different.
4. The air gap between the rotor and the stator of the motor is very small, which constitutes severe shock marks. It is caused by the thermal deformation of the rotor core, which causes the stator and the rotor to conflict. When the rotor rotates, it interferes with the bottom of the stator core and increases the bearing load.
5. The metal of the bearing raceway falls into flake or granular debris, which falls from the surface of the raceway, which is caused by the fatigue of the bearing metal materials.
6. ​​Bearing corrosion and pitting are caused by the intrusion of water vapor, acid and alkali into the inside of the bearing due to the imperfect seal, or the use of unqualified smooth grease.
7. Bearings wear too fast and prematurely aging, which is probably caused by the intrusion of dust, sand, metal particles and other impurities into the bearing to accelerate bearing wear. In addition, it may also be caused by the lack of oil in the bearing and the wrong type of grease used, long-term overload operation, poor protection, and poor quality of the bearing itself.
8. The bearing itself is aging. The general rule is: 10,000 hours of heavy-duty operation, 15,000 hours of medium-duty operation, and 20,000 hours of light-duty operation. Consider replacing new bearings to ensure safe operation.

 

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