Solid particle suction preventive type fluid dynamic pressure mechanical sealing ring

Abstract

The invention relates to a solid particle suction preventive type fluid dynamic pressure mechanical sealing ring, which is a mechanical sealing moving ring. A particle stopping groove with the micron-sized depth, a dynamic pressure groove with the micro-sized depth and a particle storage groove with the millimeter-sized depth are arranged on an end surface of the moving ring. The particle stopping groove can stop solid particles from being sucked in the sealing ring, the dynamic pressure groove has a fluid pumping effect and a dynamic pressure effect, and the particle storage groove has a solid particle storage function. Leakage of mechanical sealing can be reduced by the aid of the sealing ring, a lubricating effect of the sealing ring can be greatly improved, the solid particles are prevented from being sucked into a sealing end surface to cause abrasion of grinding particles, and processing is convenient.

Description

technical field [0001] The invention relates to a fluid mechanical seal technology, in particular to a fluid dynamic pressure mechanical seal ring which prevents the inhalation of solid particles. Background technique [0002] In the prior art, in order to improve the lubrication state of the sealing end face in the mechanical seal and reduce leakage, various special mechanical seals using hydrodynamic and static pressure effects and pumping effects have emerged, including dry gas seals and upstream pumping mechanical seals. The dry gas seal is to set up a fluid dynamic pressure groove on the outer diameter side of the seal dynamic ring section. When the dynamic ring rotates, the fluid dynamic pressure groove pumps the gas on the outer diameter side into the seal end faces to form a thin layer of gas film, so that The seal works in a non-contact state; the upstream pumping mechanical seal is to set up a hydrodynamic pressure groove on the inner diameter side of the seal dyna...

AI Technical Summary

Problems solved by technology

Chinese patent 101701585 A discloses a two-way self-upstream pumping mechanical seal ring, which can simplify the structure of the mechanical seal, reduce the degree of friction and wear caused by direct contact with the sealing end face of the mechanical seal, prolong the service life of the seal, and reduce the cost of the sealing device. cost, and can rotate in both directions. However, in terms of avoiding abrasive wear caused by solid particles being sucked into the sealing end face, the sealing ring does not reflect the mechanism of removing impurities, which cannot explain and solve this problem well; Chinese patent 2534428Y published A single-row staggered fluid dynamic pressure tank upstream pumping mechanical seal has good instant opening ability and timely removal of solid particles, but the mechanical seal cannot effectively prevent the inhalation of solid particles; Chinese patent 2534429Y and Chinese patent 00239202.X The published mechanical seals are also not effective in preventing the inhalation of solid particles

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