End face mechanical seal structure with air inlet grooves and micropores

Abstract

An end face mechanical seal structure with air inlet grooves and micropores comprises two end faces for mechanical seal. The two end faces are a moving ring and a static ring. Micropore groups in symmetrical distribution according to the rotation center and a ring-shaped seal dam are sequentially arranged on one end face from the high-pressure side to the low-pressure side; a plurality of micropore groups are distributed on the high-pressure side of the end face, every micropore group comprises a straight-line-shaped air inlet groove and a plurality of oval micropores, wherein the centers of the micropores are located on the air inlet groove, included angles of the long axis of every micropore and the air inlet groove are identical, and one end of every micropore facing to air flow is located on the high-pressure side of the end face. Straight lines where the air inlet grooves are located are obliquely crossed with the radius of the end face, and the shiny side ring-shaped seal dam is arranged on the low-pressure side of the end face. The end face mechanical seal structure has the advantages that starting performance under high-pressure frequent starting and shutdown working conditions is improved; the problem that the end face dynamic pressure effect is weak due to gas negative pressure effect is solved; the capability and the advantages of the micropore in stopping solid particles are brought into full play; the dynamic pressure effect and disturbance resistance are enhanced, the service life is prolonged, and end face stability is improved.

Description

technical field [0001] The invention relates to a microporous end face mechanical seal structure with an air inlet groove. Background technique [0002] Due to the excellent anti-friction performance of the microporous end face and its excellent tribological properties in the occasions where it is easy to gasify and crystallize, and the content of solid particles is high, it is widely used. At home and abroad, there are various microporous sealing end surface structures such as circular micropores, directional micropores, double-row inclined directional micropores, variable distribution micropores, spike-shaped micropores, and spiral groove auxiliary micropores, so as to fully Utilize the anti-solid particle ability of the microporous structure, improve its dynamic pressure effect, and prolong the service life of the sealing end face. However, under high-pressure conditions where the machine starts and stops frequently, the gas is not easy to enter the closed hole area, res...

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Problems solved by technology

[0003] In order to solve the problem that the non-contact dry gas seal is difficult for the sealing medium to enter the sealing end face under high-pressure frequent start-stop conditions and the end-face dynamic pressure effect is weakened due to the negative pressure effect in the hole area under high-speed working conditions, the present invention provides a high-pressure dry gas seal. Frequent start and stop, high speed and solid particles, etc., improve the opening problem of the sealing end face, and improve the dynamic pressure effect of the end face mechanical seal structure with air inlet groove microporous end face

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