Even if there is no medium pressure or the pressure is very small, the O-ring seal can be sealed by its own elastic force; when the cavity is filled with a pressurized medium, the O-ring seal will be displaced under the action of the medium pressure , Move to the low pressure side, while its elastic deformation is further increased, filling and closing the gap δ. When the O-ring is installed, it is compressed from the inner radial direction and the section is compressed.
The gap is formed by a cylindrical rod and a cylindrical hole, and the rod moves axially in the cylindrical hole. However, when the liquid medium is sealed, the situation is more complicated than static sealing due to the rod movement speed, liquid pressure, and viscosity. Leakage, otherwise, leakage occurs.333×105Pa vacuum to 400MPa high pressure; the temperature range can be from -60°C to 200°C. If designed and used correctly, O-ring seals can achieve absolute leak-free sealing in static seals. They are only suitable for some heavy machinery and equipment for petroleum and chemical industries. The Joule heating effect generates frictional heat at the contact between the high-speed rotating shaft and the O-ring, and the generated heat causes the temperature of these contact parts to rise continuously.
This is mainly due to the high friction under this condition, which will cause premature seal failure.O-ring seal is abbreviated as O-ring, which is a rubber ring with a circular cross-section. In hydraulic rotating, pneumatic components and systems, reciprocating sealing is the most common sealing requirement. But it is harmful to leakage. After the O-ring seal is installed in the seal groove, its section undergoes contact compression stress and elastically deforms.
Sealing principle Mechanical Bearing 696 for static sealing O-rings are the most widely used in static sealing. And, try to use sealing materials that are less affected by heat, and fully consider the heat dissipation of the O-ring installation. O-ring seal is a kind of squeeze type seal. When used for static seal and dynamic seal, the causes and calculation methods of the contact pressure of the seal contact surface are different, and they need to be explained separately. We have studied solutions to this problem and designed a new O-ring sealing structure to make O-rings can be better applied to high-speed, high-pressure rotational motion.
Tags: Mechanical Bearing 696
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