Pay attention to the work of water pump shaft bearing

1. Avoid installing foreign objects?

When the imported bearing is installed on the rotor for dynamic balancing, it is very simple to insert 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 installation, some manufacturers apply some oil or grease to the imported bearing chamber during installation to make it smooth? But it is often difficult for the operator to control the amount well? If more oil or grease accumulates in the imported bearing chamber? In the water pump shaft When the imported bearing is rolling, it is very simple 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 painted, it must be controlled and not accumulated in the imported bearing room.

2.Prevention of paint rust?

The characteristic of paint rust is that it mostly occurs in sealed motors. The motor sounds very good when installed. But after putting it in the warehouse for some time, the abnormal noise of the motor becomes very large. Remove the water pump shaft and the imported bearing. There is severe rust. . Many manufacturers once thought it was the problem of imported bearings? Through our continuous promotion? Now the motor factory has realized that the first problem is the insulating paint. The problem is mainly due to the acidic substances evaporated from the insulating paint that constitute corrosive substances at a certain temperature and humidity? Corrosion of the imported bearing raceway leads to the damage of the imported INA bearing. At present, the problem can only be to choose a good insulating paint and install it after drying for a period of time and ventilation.

3. Selection and control of shaft and imported bearing room for public service?

The imported bearing of the water pump shaft should roll flexibly without any sense of blocking after being pressed into the imported bearing. If there is significant rolling inflexibility? The scale of the indicated axis is too large? The public service should be lowered. If the water pump shaft and the imported bearing are pressed into the shaft, there is a significant "sand" feeling after rolling by hand? It may be that the shaft is too large or the roundness of the shaft is not good. Therefore, it is necessary to control the roundness when controlling the shaft and the imported bearing room for public service. At present, many domestic manufacturers only control the public service without controlling the roundness.

4. How to install imported bearings?

Because the imported bearings are high-precision products, improper installation of the water pump shaft and coupling is very simple to damage the water pump shaft and the imported bearing channel, resulting in damage to the INA imported bearing. Imported bearings should have a special mold when they are installed. They can’t be knocked at will. When they are pressed into the shaft, they can only receive a small circle of force. When they press a large circle, they can only receive a large circle. It is required to use air pressure or hydraulic pressure during installation. When pressing, the upper and lower touch should be outside the horizontal condition. If there is a skew, it will cause the imported bearing channel to be damaged due to the force. The imported bearing will cause noise.