Large-diameter large-gap magnetic liquid static seal structure

Abstract

The invention discloses a large-diameter large-gap magnetic liquid static seal structure comprising a housing (2), a seal assembly, magnetic liquid and a chassis (12), wherein the housing is made of a nonmagnetic material and is welded and connected with a seal body (1); the seal assembly is arranged in the groove of the housing; the magnetic liquid is filled on the inner ring surface of an annular permanent magnet (6); a gasket (10) is arranged between a chassis and the housing; the chassis, the gasket and the housing are tightly fixed by bolts (11) to ensure the seal gap by adjusting the thickness of the gasket; on the chassis, an inner seal tooth (4) and an outer seal tooth (9) are manufactured; the parameters of the tooth profile of the seal tooth are as follows: tooth width is 1 mm, tooth height is 3 mm, and groove width is 3 mm. The seal assembly is formed by splicing an annular inner pole shoe (5) embedded into an O-shaped seal ring, an annular permanent magnet and an annular outer pole shoe (7) embedded into the O-shaped seal ring in sequence. The invention solves the problem of the static pressure sealing of magnetic liquid of which the seal shaft diameter is more than 300 mm and the seal gap exceeds 1 mm.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering sealing, and is particularly suitable for static sealing of magnetic liquid under the condition of large diameter and large gap. Background technique [0002] Under normal conditions, the sealing gap in the magnetic liquid sealing structure is generally 0.05-0.15mm, and the maximum is not more than 0.25mm. However, in the metallurgical industry, aviation, and marine fields, it is necessary to seal the effective pressure of the gas under the condition that the sealing shaft diameter is greater than 300mm and the sealing gap exceeds 1mm, and the sealed body and the sealing structure are required to be easily disassembled and the sealing gap can be adjusted. The traditional gasket seal will bring problems such as difficult assembly, uneven deformation and poor sealing effect. Other forms of seal will also encounter problems such as complex mechanical structure or difficult processing o...

AI Technical Summary

Problems solved by technology

The traditional gasket seal will bring problems such as difficult assembly, uneven deformation and poor sealing effect. Other forms of seal will also encounter problems such as complex mechanical structure or difficult processing of sealing components.

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