A composite sealing end face structure with three-diversity microholes and stepped spiral arc grooves

Abstract

The invention discloses a composite sealing end surface structure of three-diversity microholes and stepped spiral arc grooves, including a moving ring and a static ring, and the end surface of the moving ring is provided with a number of different depths, including basic line grooves and basic spiral grooves. Step spiral arc groove; there are several groups of fractal microholes including three rows of sub-arc microholes on the end surface of the static ring and showing a three-diversity feature along the direction from the outer diameter to the inner diameter. The depth is different; the area on the end surface of the moving ring radially located within the stepped spiral arc groove is the moving ring seal dam, and the basic line groove, basic spiral groove, moving ring sealing dam and the end surface of the static ring are separated from the outer diameter of the end surface of the moving ring. The three rows of sub-arc micro-holes distributed to the inner diameter correspond to each other one by one, forming a composite graphic feature of the contact surface of the dynamic and static rings. The composite sealing end face structure of the three-diversity micropore and the stepped spiral arc groove disclosed by the present invention has the characteristics of suppressing vibration, increasing stability and reducing friction, and has the advantages of strong dynamic pressure opening performance and low leakage of the end face.

Description

technical field [0001] The invention relates to the technical field of mechanical seals, in particular to a composite sealing end face structure of three-diversity micropores and stepped spiral arc grooves. Background technique [0002] Since the development of mechanical seals in the last century, due to their outstanding performance advantages, they have been widely used in shaft end seals of rotating machinery such as compressors, pumps, turbines, flue gas turbines, and reactors. The development stage of mechanical seal can be divided into three stages: in the first stage, the dynamic ring and the static ring form a pair of friction pairs for long-term continuous friction, and the contact end surface is cooled by the cooling cycle device, but the exposed life is low and the vibration is large. Insufficient stability and other adverse effects; in the second stage, specific patterns are engraved on the surface of the moving ring. Through the dynamic pressure effect of these...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: In order to overcome the problems of high leakage, insufficient liquid film rigidity, and serious scratches on the end face when the seal operates under low-speed and low-pressure vibration conditions, it provides a vibration-suppressing and stabilizing seal under low-speed and low-pressure vibration conditions. The characteristics of anti-friction, and the dynamic pressure opening performance of the end face is strong and the leakage is low. The composite sealing end face structure of the three-diversity micro-hole and the stepped spiral arc groove

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