Oil groove

Oil groove

（Oil storage seal groove）

The annular groove is machined on the shaft to store grease to prevent dirt from entering the bearing.

O-ring

O-ring seal is abbreviated as O-ring, and it began to appear in the middle of the 19th century when it was used as a sealing element for steam engine cylinders. O-type rubber sealing ring has the following advantages: 

1) The structure of the sealing part is simple, the installation part is compact, and the weight is lighter; 

2) It has a self-sealing effect; often only one seal can complete the sealing;

3) Good sealing performance, when used as a static seal can almost be done without leakage; 

4) The movement of frictional resistance is very small, and it can be adapted to the occasion of alternating pressure;

5) The size and groove have been standardized, the cost is low, and it is easy to use and outsource. 

Non-contact seal

The general terms for sealing devices that are not in contact with relatively moving parts depends on the sealing efficiency of a narrow gap. The gap has three forms: axial, radial or combined.

Helical curved road seal 

Gap sealing for helical axis

The end cover and the end of the bushing rib are helical tooth-shaped curved seals for inclined working conditions.

Double-stage curved road seal 

The double-stage tortuous seal is used in the end cover hole with two ribs inserted in the groove of the shaft sleeve to form a two-stage tortuous seal.