Let's talk about how to deal with the wear of motor rotor bearing gear.

First of all, knurling on the shaft is an emergency method, not a long-term solution. When the motor runs for a long time, it will produce vibration and other phenomena. The best solution is the method mentioned on the sixth floor, but it needs to be added that after welding, the journal should be wrapped with thermal insulation material in time, then naturally cooled and processed on the window. When machining, the machining accuracy of the journal should be +2 threads in the diameter of the inner ring of the bearing, and the machining of the shaft is conditional. There are also shaft changers, but the cost is higher.

Motor bearing wear fault:

First, if the bearing is broken, it will burn to death. If the motor gets stuck, it won't move. If it cannot be stuck, the rotor will rub against the stator and eventually short-circuit.

Second, if only the bearing is worn, resulting in low accuracy and high noise, there will be shaft jumping, unstable current and fever.

Thirdly, the rotating shaft is supported by the bearing, which is the heaviest part and easy to wear. Fault check:

1. Inspection in operation: When the rolling bearing is short of oil, it will hear clicking sound; If you hear a discontinuous clicking sound, it may be that the bearing steel ring is broken. When the bearing is mixed with sand and other sundries or the bearing parts are slightly worn, it will produce slight noise.

2. Inspection after disassembly: First, check whether the bearing roller and the inner and outer rings are damaged, corroded and scarred, then hold the bearing inner ring with one hand and make the bearing smooth, and push the outer ring with the other hand. If the bearing is in good condition, the outer ring should rotate smoothly, without vibration and obvious jamming, and the outer ring will not go backwards after stopping, otherwise the bearing can not be used again. Hold the outer ring with the left hand and the inner ring steel ring with the right hand, and push hard in all directions. If you feel loose when pushing, it is seriously worn.

Fourth, fault repair.

1. Rust spots on the outer surface of the bearing can be wiped off with No.00 sandpaper, and then cleaned with gasoline.

2. When the bearing is cracked, the inner and outer rings are broken or the bearing is excessively worn, a new bearing should be replaced. When replacing a new bearing, choose the same bearing as the original model.