Pay attention to questions about automotive water pump bearings

Pay attention to questions about automotive water pump bearings

  1. Prevention of foreign objects in the device?

  When the imported bearing is installed on the rotor for dynamic balance, it is very simple to put the iron filings generated during the dynamic balance into the imported bearing? Therefore, it is best to perform dynamic balance before installing the imported bearing. For the convenience of installation, some manufacturers apply some oil or grease to the imported bearing chamber for lubrication during installation. However, it is usually difficult for the operator to control the amount properly. 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 applied, it must be controlled and not accumulated in the imported bearing room.

  2.Avoid lacquer rust?

  The characteristic of paint rust is that it mostly occurs in sealed motors. The motor sounds very good when it is installed. But after some hours in the warehouse, 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 question of imported bearings? After our advocacy from time to time? In the past, the motor factory has now realized that the first question is the insulating paint. This question is mainly because the acidic substances evaporated from the insulating paint constitute corrosive substances at a certain temperature and humidity. After the imported bearing groove is corroded, the INA imported bearing is damaged. At present, the question can only be to choose a good insulating paint and ventilate for a period of time after drying.

  3. The choice and control of the shaft and the 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 when rolling by hand? It may be that the shaft is too large or the roundness of the shaft is not good. Therefore, when you control the shaft and the imported bearing room, you must also control the roundness. At present, many domestic manufacturers only stop the control on the public service but not the roundness.

  4. How to install imported bearings?

  Because the imported bearing is a high-precision commodity, the shaft of the water pump is connected to the shaft. If the device is improper, it is very easy to damage the shaft of the water pump and the imported bearing channel and cause the INA imported bearing to be damaged. Imported bearings should have special molds 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 requested to use air pressure or hydraulic pressure during installation. When pressing, the upper and lower touches should be externally affected. If the situation is inclined, the imported bearing channel will be damaged due to the force. The imported bearing will cause noise.

What are the functions of using automotive water pump bearing materials

    The main task of the service life analysis of the water pump shaft bearing is to find out the main elements that constitute the failure of the bearing based on a large number of scenery materials, analysis data and failure modes, so as to propose improvement methods, extend the decommissioning period of the bearing, and prevent Sudden early failure of the bearing.

    The function of preventing adhesion and forming border lubrication when the shaft diameter and the bearing bush are directly touched. The material elements that affect the compatibility of conflicts are:

   (1) The level of difficulty of forming an alloy in the metallurgy of the sub-materials.

   (2) The affinity of materials and lubricants.

   (3) The interference factor of the sub-materials in the non-lubricated state.

   (4) Microscopic layout of materials.

   (5) The thermal conductivity of the material.

   (6) The size of the surface energy of the material and the characteristics of the oxide film.