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02

2020

-

09

Internal High Pressure Seal About the Seal Principle

Regarding the sealing principle of the internal high-pressure seal, the sealing system structure of the non-contact seal is different, and the sealing mechanism is very different, which cannot be classified through detailed analysis.


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Internal high pressure sealRegarding the sealing principle, the sealing system structure of non-contact seal is different, and the sealing mechanism is very different, which cannot be classified through detailed analysis. For contact seals, both dynamic seals and static seals are contact seals between solids. The theoretical knowledge of the sealing mechanism can be developed into the following three categories: blocking theory, self-sealing theory and interference theory.

1、The closure theory holds that the closure effect of the sealing material is caused by the closure effect formed by the elastic restoring force of the sealing material on the contact pressure and fastening force of the joint surface. The locked-rotor theory is mainly applicable to gasket static seals.Internal high pressure sealAbout the sealing principle For gasket sealing, the sealing principle can be divided into plastic surface contact sealing principle and elastic line contact sealing principle. The gasket is sealed by plastic surface contact, that is, the flange is pressed by bolt force, and the gasket is plastically deformed to fill the uneven place on the sealing surface and eliminate the gap. The elastic line contact seal is shown, that is, the gasket and the sealing surface are precision shaped surfaces of different curvatures, which form a closed circular contact line after contact. Relying on Wei Xiao elastic deformation to fill the uneven sealing line on the contact line and eliminate the gap.

2,Self-sealing principle: When the sealing material is installed at the joint, a certain contact pressure is generated on the surface of the joint. When the internal medium pressure is applied, the sealing material superimposes the internal pressure on the contact pressure, so that the sealing material and the joint surface are better fitted, and the sealing effect is improved. The amount of edge structure with interference

3、Internal high pressure sealRegarding the sealing principle interference theory of the sealing material, the contact surface of the shaft can generate a sufficiently large contact pressure to achieve the purpose of sealing. Seal Typical Gain Seal.

 

Key words:

Internal high pressure seal,Rotating seal ring