Installation and precautions of automobile water pump bearings

The automobile water pump bearing is a type of bearing. The cage material is usually reinforced nylon 66, and the seal ring material is generally nitrile rubber. When the requirements are higher, a fluorine rubber seal ring can also be used.

The cooling system of the car engine is an important part of the car. The stability and reliability of the system and the compactness of its structure. Not only directly affects the mechanical properties of the car, but also affects the overall appearance of the car. For this reason, automobile engine cooling systems produced by industrially developed countries generally use cooling water pump shaft bearings.

The role of the automobile water pump is to circulate the cooling water between the engine water jacket and the radiator to ensure that the engine works normally within a certain temperature range; the water pump is mainly composed of the shell, the pulley, the shaft and the bearing, the slip ring seal and the impeller The bearing has a decisive effect on the service life of the entire water pump, and also determines the main performance of the water pump such as noise.

    The characteristic of paint rust is that it mostly occurs in sealed motors. The sound of the motor is 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 constant 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 at a certain temperature and humidity, which causes the INA imported bearing to be damaged after the imported bearing channel is corroded. The problem can only be to select a good insulating paint and ventilate for a period of time after drying and assembly.

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 operators to control the amount. If a lot of oil or grease accumulates in the imported bearing chamber, it will be on the water pump shaft. When even 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.

    The life of the automobile water pump bearing is closely related to the load, and the load is related to the unbalanced amount of the rotating component. Through the test of the WR3258152 automobile water pump bearing, the influence of the unbalance of the fan and pulley eccentricity on the load and life of the automobile water pump bearing is studied. It is calculated that the eccentricity of the pulley and the fan will cause the radial load of the rolling elements on both sides of the automobile water pump bearing to fluctuate greatly, and the service life will be reduced accordingly.