Time： 2021-09-07 10:25:50
The rotating shaft is the main part of the motor to transmit torque and drive mechanical load. It should have sufficient strength to transmit the power of the motor and sufficient stiffness to prevent the motor from vibration and friction between stator and rotor during operation.
The rotating shaft may be damaged if used improperly. For example, when removing the pulley, do not use special tools to knock randomly; When the belt pulley or coupling is not in the same straight line during installation, it may cause shaft bending or other faults.
1. Inspection of shaft head bending
Clamp the rotor to be inspected on the lathe and measure it with a dial indicator or needle dial. If the bending of the shaft head exceeds the allowable range, it shall be corrected. The correction can be carried out on the press to press and straighten the bending part of the shaft. The corrected surface shall be polished.
2 repair of worn keyway
When the keyway is seriously worn, it can be overlaid at the worn part by electric welding, and then annealed to eliminate the welding stress, turning and heavy gun the keyway. If the wear of the keyway is not large, the cloth at the grinding place can be widened, and the widening amount shall not exceed 15% of the original keyway width.
3 repair of worn Journal
When the journal is slightly worn, a layer of chromium can be plated on the surface of the journal by electroplating. Then grind to the specified size. A thin layer of metal can also be sprayed on the journal by metal spraying method to grind the journal car sprayed with metal to the specified size. When the journal wear is serious, the stator and rotor may rub against each other. Therefore, it is necessary to build up the worn part of the journal with electric welding, then anneal to eliminate the welding stress, and then cut and polish to the matching size. It should be pointed out that repairing the journal by surfacing may cause the deformation of the rotating shaft, and the seriously worn journal is repaired by inserting sleeve. If the rotating shaft is broken, replace it with a new shaft with the same steel grade.