Spiral Distribution Convergent Microporous Texture Mechanical Seal

Abstract

A spiral distribution convergent micropore texture mechanical seal comprises a seal movable ring and a static ring, a sealing end face of at least one of the movable ring and the static ring is provided with convergent micropore textures distributed in a spiral mode, the textures are distributed on the whole sealing end face, or an annular dam area is arranged at the position close to the low-pressure side, center distribution lines of rows of micropores of the micropore textures are spiral lines, the micropore textures are convergent textures, when the outside of a sealing ring is a high-pressure side, the convergence direction of the micropores is opposite to the spreading direction of the spiral lines, and when the inner side of the sealing ring is a high-pressure side, the convergence direction of the micropores is the same as the spreading direction of the spiral lines. The mechanical seal effectively improves bearing capacity of the sealing end face so that the seal can be opened at a lower rotation speed, it is guaranteed that a lubrication film has larger rigidity on the condition of small film thickness and small pressure difference, and accordingly collision and friction during starting and stopping stages are reduced; the mechanical seal is suitable for gas and liquid media, friction of the seal is reduced, service life of the seal is prolonged and reliability of the seal is improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical seals of rotating shafts, and particularly relates to a helical distribution convergent type microporous texture mechanical seal. Background technique [0002] Surface texture technology is widely used for friction reduction and drag reduction of friction pairs, and it has also been successfully applied in the field of mechanical seals. Engineering practice shows that the friction-reducing effect of surface texture can effectively improve the wear resistance and service life of the sealing end face. [0003] In 1996, Israeli scholar Etsion first proposed a mechanical seal based on laser microporous technology for liquid shaft seals of pumps. In order to improve the problem of poor dynamic pressure opening ability of microporous texture under dry gas sealing and low speed conditions, a variety of new end face textures have appeared at home and abroad to improve the effect of end face microporou...

AI Technical Summary

Problems solved by technology

However, the hydrodynamic and static pressure effects of these microporous textures are limited, and they can only produce sufficient bearing capacity under high-speed and small-film-thickness conditions. During the start-stop process, end-face friction is prone to occur, resulting in wear and affecting the reliability of the seal. Sex and service life

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