Large-diameter large-gap magnetic liquid static seal structure

A magnetic liquid, large gap technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of difficult processing of sealing components, poor sealing effect, uneven deformation, etc., to achieve widening application range, long service life, Ease of processing

Inactive Publication Date: 2010-07-14
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Large-diameter large-gap magnetic liquid static seal structure
  • Large-diameter large-gap magnetic liquid static seal structure
  • Large-diameter large-gap magnetic liquid static seal structure

Examples

Experimental program
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Effect test

Embodiment Construction

[0014] The present invention will be further described with accompanying drawing as specific embodiment:

[0015] A large-diameter large-gap magnetic liquid static sealing structure, see figure 1 , 2 . The structure includes: a casing 2 , a sealing assembly, a magnetic fluid, and a chassis 12 .

[0016] The shell 2 is made of non-magnetic material, and is welded with the sealing body 1; the sealing assembly is placed in the groove of the shell 2, and the magnetic liquid is injected into the inner ring surface of the annular permanent magnet 6; there is a cushion between the chassis 12 and the shell 2 Gasket 10, the chassis 12, gasket 10 and shell 2 are fastened together with screws 11, and the thickness of the gasket 10 is adjusted to ensure the sealing gap;

[0017] On the chassis 12, r from the centerline 1 and r 2 Start to make the inner sealing teeth 4 and the outer sealing teeth 9. The shape of the sealing teeth is rectangular, and the size of each tooth is the same...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/06F16J15/14
Inventor 李德才杨文明
Owner BEIJING JIAOTONG UNIV
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