Carbocycle sealing structure similar to surface texture of dorsal carapaces of desert beetles

Abstract

Provided is a carbocycle sealing structure similar to the surface texture of the dorsal carapace of a desert beetle. One axial side of the carbocycle sealing structure is designed for sealed liquid, and the other side is designed for insulated gas, the pressure of the insulated gas is about 0.05-0.15 MPa lower than that of the sealed liquid; the inner diameter side surface of the carbocycle sealing structure and the surface of a rotating shaft of a sealed machine form a sealing pair; the inner diameter side surface is composed of a smooth hydrophilic surface 1, a fin-like stream guiding protrusion 2 and an upstream spiral pumping groove with a hydrophobic surface 3 which are evenly arranged in a circumferential direction; the fin-like stream guiding protrusion 2 is arranged between the smooth hydrophilic surface 1 and the upstream spiral pumping groove with the hydrophobic surface 3; the bottom surface of the upstream spiral pumping groove with the hydrophobic surface 3 is coated with hydrophobic paint and provided with a segment-type hydrophilic micro protrusion.

Description

technical field [0001] The invention belongs to the field of non-contact sealing, and relates to a carbon ring sealing structure that utilizes the surface texture of the imitation desert beetle back and the hydrophilic or hydrophobic properties of the surface material to achieve the collection of wet gas or liquid components in the atomized sealing medium , and pump the collected liquid back to the side of the sealing medium through the directional texture. Because of its simple structure and convenient maintenance, the carbon ring seal does not require complicated lubrication and cooling systems. It is mainly used in rotary turbine equipment such as petrochemical industry and metallurgy. Shaft end seal and bearing seal. Background technique [0002] At present, there are three types of main seals commonly used in process oil-free screw compressors. Among them, carbon ring seals rely on small gaps to throttle and reduce pressure to achieve sealing functions. Because of their...

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Problems solved by technology

[0003] The present invention aims to overcome the shortcomings of the carbon ring seal in the prior art, such as large leakage and poor dynamic pressure effect caused by a large gap, and provides a ring surface with better sealing effect based on the working principle of the bionic desert beetle back surface texture. Better dynamic pressure effect with hydrophilic and hydrophobic diversion upstream pumping carbon ring structure

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