Self-tightening conical ring sealing structure

Abstract

The invention discloses a self-tightening conical ring sealing structure, which comprises an upper sealing body, a lower sealing body and a conical ring sealing gasket, wherein the sealing surface of the upper sealing body is provided with a two-step stage; the sealing surface of the lower sealing body is provided with a one-step stage; the inner ring surface and the outer ring surface of the conical ring sealing gasket are tightly contacted with the sealing cylindrical surface of the upper sealing body and the sealing cylindrical surface of the lower sealing body respectively, so that narrow surface sealing is realized; and an upper cutting edge and a lower cutting edge of the sealed ring are respectively clamped on the stages of the upper sealing body and the lower sealing body, so that cutting edge line sealing is realized. The invention has the advantages that: the self-tightening conical ring sealing structure has two advantages of self-tightening sealing and cutting edge line sealing; the working pressure is large, and the sealing effect is good; the conical ring is thin, so that the conical ring is elastically deformed in a width direction to make up for the extending deformation of a bolt and insure the sealing; due to a smaller pretightening force, larger sealing specific pressure can be acquired; after the conical ring is pretightened, the sealing cutting edges are tightly contacted with the stages of the upper sealing body and the lower sealing body to form the cutting edge line sealing; and the sealing effect is enhanced.

Description

technical field [0001] The invention belongs to the technical field of sealing, and relates to a sealing structure under high pressure and high temperature conditions, in particular to the structural shape of a sealing element to realize leak-free sealing under high pressure, high temperature and high fatigue conditions. Background technique [0002] In the design of the sealing structure, a variety of sealing structures are adopted according to different purposes. From the characteristics of the sealing force, it can be divided into forced sealing structure and self-tightening sealing structure. The forced sealing mainly relies on a large bolt force to achieve sealing. The higher the working pressure, the greater the bolt force is required; the self-tightening seal mainly relies on its own structural characteristics , After the working pressure increases, the contact pressure between the sealing element and the sealing structure increases, the greater the working pressure, ...

AI Technical Summary

Problems solved by technology

For traditional self-tightening gaskets, due to the large size of the gasket, it is difficult to manufacture, and most of the sealing surfaces are of surface seal structure. When the sealing space is limited, especially in high temperature, high pressure, and high fatigue occasions, the gasket's resilience is not very good , the sealing effect is not good, and under high temperature and high pressure, it cannot pass the leak detection requirements of halogen element or helium mass spectrometer leak detector

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