Precautions for bearing of automobile water pump shaft

Prevention of assembly foreign matter

When the imported bearing is installed on the rotor for dynamic balancing, it is easy to enter the iron filings generated during the dynamic balancing into the imported bearing? Therefore, it is best to perform dynamic balancing before installing the imported bearing. For the convenience of assembly, some manufacturers apply some oil or grease to the imported bearing chamber for lubrication effect during assembly. However, it is often difficult for the operator to control the amount. If more oil or grease accumulates in the imported bearing chamber? In the water pump shaft When the imported bearing rotates, it is easy to enter the inside of the INA imported bearing along the shaft. It is best not to apply oil or grease to the imported bearing room. If it must be applied, it must be controlled not to accumulate in the imported bearing room.

Prevention of paint rust

The characteristic of lacquer rust is that it mostly occurs in the sealed motor? The motor sounds very good during assembly? But after some time in the warehouse? The abnormal noise of the motor becomes very large. Remove the water pump shaft and the imported bearing. There is serious rust. . In the past, many manufacturers would think it was a problem with imported bearings? After our continuous publicity. The electric machine factory has realized that the problem is mainly the insulating paint. This problem is mainly because the acidic substance volatilized from the insulating paint forms corrosive substances under a certain temperature and humidity. After the imported bearing groove is corroded, the imported INA bearing is damaged. The problem can only be to select a good insulating paint and ventilate for a period of time after drying and assembly.

Selection and Control of Tolerance of Shaft and Imported Bearing Room

The imported bearing of the water pump shaft should rotate flexibly without any sense of blocking after being pressed into the imported bearing. If the rotation is obviously not flexible? It means that the size of the shaft is too large? The tolerance should be lowered. If the water pump shaft and the imported bearing are pressed into the shaft, there is an obvious feeling of "sand" when rotating by hand? It may be because the tolerance of the shaft is too large or the roundness of the shaft is not good. Therefore, when controlling the tolerance of the shaft and the imported bearing room, the roundness must be controlled. Many domestic manufacturers only control the tolerance but not the roundness.