Double-row tilting directional microporous end surface no-leakage mechanical sealing structure

Abstract

The invention relates to a double-row tilting directional microporous end surface no-leakage mechanical sealing structure, comprising a dynamic ring and a static ring which are sealed mechanically, wherein one side of the end surface of the dynamic ring or the static ring is an high-voltage side, namely an upstream part, and the other side thereof is a low-voltage side, namely an downstream part,the end surface of the dynamic ring or the static ring is provided with an outer microporous ring belt and an inner microporous ring belt; microporous long shafts of the outer microporous ring belt and the inner microporous ring belt are opposite to the direction of a tilting angle of the diameter of the sealing end surface passing through the center of the micropore; the outer microporous ring belt and the inner microporous ring belt are respectively arranged on the upstream part and the downstream part of the end surface; and a continuous ring-shaped sealing dam are respectively arranged between the outer microporous ring belt and the inner microporous ring belt and the downstream part of the inner microporous ring belt. The mechanical sealing structure has the beneficial effects of: realizing no contact, wear resistance and no leakage of sealing, prolonging the service life and improving the sealing reliability.

Description

technical field [0001] The patent of the present invention relates to the technical field of end face mechanical seal structure design, specifically refers to the double-row inclined directional microporous end face non-leakage mechanical seal structure, which is suitable for shaft end seals of rotating shafts of various compressors, pumps, and kettle agitators. device. Background technique [0002] Mechanical seals are the main means to prevent shaft end leakage of rotary fluid machinery. With the rapid development of petrochemical and other industries, mechanical seals are required to develop with high parameters, higher stability and reliability and longer service life, and Toxic, flammable and explosive gases require strict control of their leakage. At present, the end face forms that realize the non-contact mechanical seal mainly include one-way spiral groove, one-way herringbone spiral groove, one-way Y-shaped spiral groove, one-way L-shaped spiral groove, one-way arc...

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Problems solved by technology

[0003] In order to overcome the limited anti-solid particle ability and fluid dynamic pressure effect of the seal in the prior art, the start-stop effect is poor under low pressure conditions, and the service life is short, especially for medium containing solid particles, gas medium and easy to crystallize and vaporize In the case of toxic and highly polluting media, the sealing reliability is poor. The invention

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