Manufacturing method of three-lip seal for automobile water pump shaft bearing

Automobile water pump shaft bearing is a kind of bearing. The cage material is usually reinforced nylon 66, and the material of the seal ring is generally nitrile rubber. When the requirements are higher, fluorine rubber seal ring can also be selected. The existing water pump shaft bearing With three-lip seals, the sealing effect is greatly improved compared with the original double-lip seals, but there are also many drawbacks: because the shaft bearings for automobile engine water pumps require long life and high reliability, the general automobile The engine water pump water seal will cause leakage or even water leakage. The double-lip seal has a good sealing effect on extremely small amounts of water and steam, but it has poor reliability and low life in this environment for a long time. The existing three-lip seal Although the sealing structure has been greatly improved on the original basis, when there is water vapor leakage at the upper sealing lip, the waterproof performance of the lower sealing lip is not good. Therefore, a new sealing structure needs to be redesigned to solve the above problems.

The utility model is an improvement to solve the above problems.

Technical realization elements:

The purpose of the utility model is to provide a three-lip seal for an automobile water pump shaft bearing with improved waterproof performance and waterproof effect.

The technical scheme adopted by the utility model to solve its technical problems is:

A three-lip seal for an automobile water pump shaft bearing, comprising a double-lip seal and a slinger ring, the slinger ring is located on one side and the lower end of the double-lip seal, and the double lip seal is provided with a seal In the skeleton, an upper sealing lip is provided on one side of the double lip seal, and a lower sealing lip is provided on the lower end of the double lip seal;

The upper sealing lip and the lower sealing lip are both installed on the double lip seal;

The upper sealing lip is located at the front and middle part of the double lip seal;

The lower sealing lip is located at the lower front of the double lip seal, wherein the water sling ring is sleeved on the upper sealing lip and the lower sealing lip;

The lower end of the seal skeleton is bent;

Further, the curved part of the lower end of the seal skeleton is embedded in the upper end of the lower sealing lip;

Furthermore, the upper sealing lip is tilted upward;

Wherein, the lower end of the seal skeleton is bent to one side of the water sling ring;

The upper sealing lip and the lower sealing lip are nested inside the water sling ring through interference fit.