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 safety of the locomotive. Therefore, the motor bearing is also very important for the locomotive. The following China Bearing Network (abbreviated as: China Bearing Network) based on the understanding of motor bearings, share common causes of motor bearings and corresponding control measures.
1. Common fault causes of motor bearings
1. The quality of the bearing itself
The bearing has problems befoe unpacking and assembly, such as loose cage rivets, cage deformation and bumps, scratches on the rollers or raceways, and even the bearings are rusted. Because the bearings are newly manufactured by random inspection, the individual bearings with these defects are likely to be loaded and used as qualified products. Once loaded and used, the bearing will inevitably give an alarm.
2. Improper assembly leads to bumps on the bearing
When assembling motor bearings, a hydraulic machine is generally used to press the outer ring of the bearing into the bearing chamber. If biased during the press-in process, the outer ring is likely to be deformed and damaged. It is not allowed to install the bearing into the bearing chamber by knocking. When the rollers of the inner ring and outer ring are assembled, if there is any deflection, it is easy to produce axial scratches on the roller and raceway surfaces, which will cause an alarm when the bearing is running. For example, when the DF11-0293 locomotive was accompanied by a test, a 34-bit bearing first-level shock alarm occurred. After returning to the factory, Tang Zhi software analyzed that, in addition to one shock alarm, this position also issued 6 single-shot warnings. The frame car replaced the small bearing at the non-drive end of the 3D traction motor.
