The function and rational use of automobile oil seal

Automobile oil seal is a mechanical component used to seal grease (oil is a very common liquid substance in the transmission system, and also generally refers to a general liquid substance). Lubricating oil leaks. What is the function of the car oil seal?

1. Prevent sediment, dust, moisture, etc. from intruding into the bearing from the outside;

2. Limit the leakage of lubricating oil in the bearing. The requirements for the oil seal are that the size (inner diameter, outer diameter and thickness) should meet the regulations; appropriate elasticity is required, which can properly clamp the shaft and play a sealing role; it must be heat-resistant, wear-resistant, strong, and resistant to media ( oil or water, etc.), long service life.

Reasonable use of Oil Seals, should pay attention to the following points:

(1) Shaft speed Due to design and structural reasons, high-speed shafts should use high-speed oil Seals, low-speed shafts should use low-speed oil seals, and low-speed oil seals cannot be used on high-speed shafts, and vice versa.

(2) When the ambient temperature is high, polyacrylate or silicon, fluorine, and silicon fluorine rubber should be selected. And should try to lower the oil temperature in the tank. When the operating temperature is too low, cold-resistant rubber should be used.

(3) The oil seal with general pressure has poor pressure bearing capacity, and the oil seal will be deformed when the pressure is too large. Under the condition of excessive pressure, a pressure-resistant bearing ring or a reinforced pressure-resistant oil seal should be used.

(4) The degree of eccentricity on the installation If the eccentricity of the oil seal and the shaft is too large, the sealing performance will be deteriorated, especially when the shaft speed is high. If the eccentricity is too large, a "W"-shaped oil seal can be used.

(5) The surface finish of the shaft directly affects the service life of the oil seal, that is, the higher the shaft finish, the longer the service life of the oil seal.