What Kind Of Sealing Form Is Suitable For Silicone O-ring?

Silicone O-ring is a seal with an O-shaped cross-section made of silicone. Its use plays a very important role in many industries, whether it is machinery production or the processing and production of ordinary daily necessities. , silicone O-rings all undertake a very important sealing job.

For silicone O-rings, it is mainly used for static and reciprocating motion seals. Its use speed range is generally 0.005~0.3m/s. It is used as a low-speed rotary sealing device in rotary motion seals, such as hydraulic excavators. The distribution valve dynamic sealing mechanism of the central rotary joint. Of course, silicone O-rings are rarely used in rotary motion sealing devices, but are mostly used to seal and install in the outer and inner grooves.

1. Static sealing of silicone O-ring

Silicone O-ring static seal, the compression rate of the O-ring is set to about 25%. (Oring cross-section diameter - groove depth)/Oring cross-section diameter ≈ 25%.

2. Dynamic sealing of silicone O-ring

The dynamic seal of the silicone O-ring is divided into circumferential rotation and axial reciprocating motion. When rotating in the circumferential direction, not all silicone O-rings can achieve a complete sealing effect, so in some cases, silicone O-rings are not used. For reciprocating motion in the axial direction, in order to prevent the silicone O-ring from wearing out too quickly, the compression rate must be appropriately reduced, and the thickness of the moving surface must be relatively high.