An Oil Seal, also known as a Shaft Seal or Rotary Seal, is a common type of seal used to prevent liquid or lubricating oil from leaking between a rotating shaft and a fixed part. It is commonly used in a variety of rotating equipment and machinery, including pump trucks.

The oil seal is mainly composed of a shell, Sealing Lip, spring and auxiliary parts. The housing is a metal or plastic ring housing that holds and supports the oil seal. The seal lip is a key part of the oil seal, which contacts the rotating shaft and provides a sealing effect. The seal lip is usually made of an elastic material (such as rubber or polyurethane), which has good sealing properties and wear resistance. The spring is used to maintain the close contact between the seal lip and the shaft to ensure the sealing effect.

The main function of the oil seal is to prevent liquid or lubricating oil from leaking from the connection of the rotating shaft, and to prevent external dust, pollutants and moisture from entering the equipment. Their applications in pump trucks include preventing leakage of hydraulic oil or lubricating oil from hydraulic cylinders, pump bodies, transmission devices, etc.

The selection of the appropriate oil seal needs to consider several factors, including the diameter of the shaft, the rotating speed, the working temperature and the working medium. Different applications may require different types and specifications of oil seals. Therefore, when the oil seal in the pump car needs to be replaced, it is recommended to select a replacement that matches the original oil seal according to the specifications and recommendations provided by the pump car manufacturer.

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