Motor Bearings Common Faults and Causes
Motor Bearings Common Faults and Causes are as below,
1. The quality of the bearing itself
The bearing has problems before unpacking and assembly, for example, loose cage rivets, cage deformation and bumps, and even bearing rust.
2. Improper assembly leads to bumps on the bearing
When assembling the motor bearing, a hydraulic press is generally used to press the outer ring of the bearing into the bearing chamber. If the bias is applied during the press-in process, the outer ring is likely to deform and damage, and the bearing should not be installed into the bearing chamber by knocking. When assembling bearing rollers, if there is a deflection, it is easy to produce axial scratches on the roller and raceway surface, which will cause bearing alarming during operation.
3. The effect of cleanliness
①Cleanliness of grease
Bearings have high requirements for grease cleanliness. If the the lubricant is mixed with particles such as quartz sand, iron filings, etc., it will cause permanent damage to bearing during operation. As a result, it will seriously affect bearing usage and life time.
②Cleanliness of parts
Bearing related parts such as bearing caps, oil guide tubes, end cover bearing chambers, etc. If these parts are not thoroughly cleaned, impurities will be mixed into the bearing during assembly, which will affect bearing usage.
During bearings assembly process, if there is a lot of floating dust in the surrounding environment, the floating and sinking will be mixed into the bearing chamber or bearing grease, which will also cause bearing failure
4. Current corrosion
During the use of the bearing, if an unknown current flows through the bearing, current burning points will be generated on the bearing raceway surface and rollers. As a result, it which will affect the service life of bearing.
5. Improper maintenance
When the locomotive is in use, it has not been properly and effectively maintained.
Such as: failure to carry out regular quantitative lubrication, failure to control the cleanliness of lubricating grease/oil, inconsistent grease type, bearing oil leakage, etc.
Bearing as one of the important parts in the motor, its performance will directly affect the normal operation of the locomotive. When the bearing is broken, damaged and sintered, it will seriously affect the driving safety of the locomotive. Therefore, the motor bearing is also very important for locomotive.
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