A large diameter and large gap magnetic liquid static sealing 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 sealed components, poor sealing effect, uneven deformation, etc., to broaden the scope of use, long service life, Ease of processing

Inactive Publication Date: 2012-02-01
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A large diameter and large gap magnetic liquid static sealing structure
  • A large diameter and large gap magnetic liquid static sealing structure
  • A large diameter and large gap magnetic liquid static sealing structure

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Experimental program
Comparison scheme
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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

A large-diameter and large-gap magnetic liquid static sealing structure includes a casing (2), a sealing assembly, magnetic liquid and a chassis (12). The shell 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, and magnetic liquid is injected into the inner ring surface of the annular permanent magnet (6); there is a cushion between the chassis and the shell Gasket (10), fasten the chassis, gasket and shell together with screws (11), and ensure the sealing gap by adjusting the thickness of the gasket; on the chassis, make inner sealing teeth (4) and outer sealing teeth ( 9), the tooth shape parameters of the sealing tooth are: tooth width 1mm, tooth height 3mm, groove width 3mm. The sealing assembly is composed of an annular inner pole shoe (5) embedded in an O-ring seal, an annular permanent magnet and an annular outer pole shoe (7) embedded in an O-ring seal. It solves the static pressure sealing problem of the magnetic liquid with the sealing shaft diameter greater than 300mm and the sealing gap exceeding 1mm.

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 Patents(China)
IPC IPC(8): F16J15/06F16J15/14
Inventor 李德才杨文明
Owner BEIJING JIAOTONG UNIV
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