Multiple-end face combined type mechanical seal for realizing zero leakage and non-contact

Abstract

The invention provides a mechanical seal provided with multiple end faces arranged between a moving ring and a stationary ring for realizing zero leakage and non-contact through the combined actions of micro concave cavities, gap channels and pumping slots. Micro concave cavities or pumping slots are respectively formed in different end faces of the mechanical seal friction pair; the dynamic pressure effect of the micro concave cavities and the pumping slots is utilized to realize the non-contact; the pressure of leaked medium is reduced by utilizing the gap channels (or provided with mazes) among different end faces; the leakage amount is reduced or the zero leakage is achieved by utilizing the pumping effect of the pumping slot. The mechanical seal has the advantages that the zero leakage and non-contact are realized through the combination of surface micro molding structures of different end faces and the gap channels, the lubricating performance during the operating process is improved, besides, good sealing performance in the case of start-up and parking can be realized through the different seal gaps of different end faces, a certain effect is achieved on the aspects of mechanical seal thermal deformation reduction and particle abrasion prevention, and the mechanical seal is applicable to the field of high parameter mechanical seal of all liquid mediums.

Description

technical field [0001] The invention relates to the technical field of multi-face mechanical seal design, and specifically refers to a new multi-face mechanical seal structure that considers parking seals, realizes zero leakage, and non-contact, and aims to obtain ideal sealing effects and minimize deformation and wear. Background technique [0002] With the development of industrial technology, the performance requirements of mechanical seals are getting higher and higher. Under some working conditions such as high pressure, high speed and high temperature, especially in some aerospace, nuclear power plants, petrochemical and other fields, mechanical seals are required to achieve zero leakage, Small deformation and long life. The rapid consumption of energy and strict environmental protection goals make improving the stability and life of mechanical seals a subject of great concern and attention in the field of mechanical seal manufacturing. [0003] In order to achieve ze...

AI Technical Summary

Problems solved by technology

However, none of the above-mentioned seals can effectively solve the serious wear problem of the end face during parking, and the sealing performance has not yet reached an ideal state.

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