Gas end face seal anti-interference device and anti-interference method

Abstract

The invention relates to an anti-jamming device and an anti-jamming method for sealing gas end faces, belonging to the field of devices for sealing the gas end faces. The anti-jamming device comprises a movable sealing ring, a static sealing ring, a film throttle and a gas supply device. Gas supply channels arranged circumferentially and uniformly and not communicated with each other are processed on the static sealing ring; each group of gas supply channels opposite radially are respectively communicated with two sides of a film in the film throttle. Gas provided by the gas supply device is throttled in the film throttle and then conveyed between the end faces to be sealed; the pressure at two sides of the film in the throttle is equal when the sealing runs normally, so the film does not bend and deform; when the static sealing ring deflects angularly, the pressure difference between the two sides of the film in the film throttle is generated; the film bends and deforms by action of the pressure difference; the gas flow resistance at the two sides of the film is changed by bending and deforming so as to be beneficial to recover the sealing to a normal operation condition. The sealing device adaptively provides the anti-jamming capability according to the size of the angular deflection of the static sealing ring.

Description

technical field [0001] The invention belongs to the technical field of gas end face sealing devices, and is suitable for the gas end face seal of the shaft end of a rotating machine, especially the gas end face seal of the shaft end under high-speed working conditions such as compressors and high-speed pumps. Background technique [0002] Gas end face seals are widely used in rotating machinery in the fields of petroleum, chemical industry, and aviation due to their advantages of small wear, low leakage rate and long service life. When the seal is running, the seal faces are kept in a non-contact state, which is full gas film lubrication. , the thickness of the gas film is in the order of microns. During the actual operation of the seal, due to manufacturing errors, installation errors and external disturbances, etc., the seal compensation ring (seal static ring) will swing around the angle, and the gap between the seal end faces is too large, and the leakage rate exceeds th...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an anti-jamming device and anti-jamming method for gas end face seals, which can effectively solve the problem of sealing failure caused by external interference caused by the swing of the sealing compensating ring (seal static ring) around the angle

Images