Bearing seals can be divided into static seals and dynamic seals
(1) Bearing Static seal.
① O-ring seal (metal copper gasket seal, rubber ring seal)
② Sealant (dry, non dry, semi dry)
③ Rubber gasket seal
（1）
Dynamic seal:
① The lip seal ring (auxiliary lip) of the rotating shaft is wrapped with a skeleton, also known as the skeleton seal
② Reciprocating sealing ring, Y-shaped sealing ring
Installation requirements of framework seal:
1. The lip Bearing should face the pressure direction.
② The pressure side facing the opening.
