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Labyrinth type magnetic fluid sealing device

A magnetic fluid and sealing device technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problem of low self-repairing ability of the sealing device, and achieve the expansion of the safe working range, easy installation and disassembly, and reduced losses. Effect

Active Publication Date: 2016-05-11
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a labyrinth-type magnetic fluid sealing device, which not only solves the problem of low self-repair ability of the existing sealing device, but also improves the pressure resistance performance of the ordinary magnetic fluid sealing device, thereby improving the reliability of the magnetic fluid seal

Method used

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  • Labyrinth type magnetic fluid sealing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, a labyrinth magnetic fluid sealing device includes a shaft 1 , a housing 2 , a bearing 3 , a magnetic isolation ring, a stepped sleeve 6 , a permanent magnet 7 , a pole piece 8 , and a sealing ring 10 .

[0021] The permanent magnet 7 is an annular body, installed on the middle part of the shaft 1; the pole shoe 8 is installed on the inner wall of the housing 2, the inner wall of the pole shoe 8 corresponds to the same radial setting of the permanent magnet 7, and the inner wall of the pole shoe 8 and the permanent magnet 7 The axis of the outer wall of the pole shoe 8 is coincident with the outer wall of the permanent magnet 7. A gap is provided between the inner wall of the pole shoe 8 and the outer wall of the permanent magnet 7. The length of the inner wall of the pole shoe 8 in the axial direction is equal to or slightly greater than the length of the outer wall of the permanent magnet 7 in the axial direction; The sealing ring 10 is arra...

Embodiment 2

[0029] Such as figure 1 As shown, a labyrinth magnetic fluid sealing device includes a shaft 1 , a housing 2 , a bearing 3 , a magnetic isolation ring, a stepped sleeve 6 , a permanent magnet 7 , a pole piece 8 , and a sealing ring 10 .

[0030] The permanent magnet 7 is an annular body, installed on the middle part of the shaft 1; the pole shoe 8 is installed on the inner wall of the housing 2, the inner wall of the pole shoe 8 corresponds to the same radial setting of the permanent magnet 7, and the inner wall of the pole shoe 8 and the permanent magnet 7 The axis of the outer wall of the pole shoe 8 is coincident with the outer wall of the permanent magnet 7. A gap is provided between the inner wall of the pole shoe 8 and the outer wall of the permanent magnet 7. The length of the inner wall of the pole shoe 8 in the axial direction is equal to or slightly greater than the length of the outer wall of the permanent magnet 7 in the axial direction; The sealing ring 10 is arra...

Embodiment 3

[0038] Such as figure 1 As shown, a labyrinth magnetic fluid sealing device includes a shaft 1 , a housing 2 , a bearing 3 , a magnetic isolation ring, a stepped sleeve 6 , a permanent magnet 7 , a pole piece 8 , and a sealing ring 10 .

[0039] The permanent magnet 7 is an annular body, installed on the middle part of the shaft 1; the pole shoe 8 is installed on the inner wall of the housing 2, the inner wall of the pole shoe 8 corresponds to the same radial setting of the permanent magnet 7, and the inner wall of the pole shoe 8 and the permanent magnet 7 The axis of the outer wall of the pole shoe 8 is coincident with the outer wall of the permanent magnet 7. A gap is provided between the inner wall of the pole shoe 8 and the outer wall of the permanent magnet 7. The length of the inner wall of the pole shoe 8 in the axial direction is equal to or slightly greater than the length of the outer wall of the permanent magnet 7 in the axial direction; The sealing ring 10 is arra...

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Abstract

The invention discloses a labyrinth type magnetic fluid sealing device. The labyrinth type magnetic fluid sealing device comprises a shaft, a casing, a bearing, magnetism separating loops, ladder sleeves, a permanent magnet, pole shoes and sealing rings, wherein the permanent magnet is a ring body and is mounted at the middle of the shaft; the pole shoes are mounted on the inner wall of the casing, the inner walls of the pole shoes are arranged corresponding to the same radial direction of the permanent magnet, the axis of the inner wall of each of the pole shoes coincides with that of the outer wall of the permanent magnet, a gap is formed between the inner walls of the pole shoes and the outer wall of the permanent magnet, and the length of the inner wall of each of the pole shoes in the axial direction is equal to or slightly larger than the length of the outer wall of the permanent magnet in the axial direction; ladder surfaces are arranged on two sides of the inner walls of the pole shoes; the ladder sleeves are respectively arranged on shafts on two sides of the permanent magnet, and ladder surfaces are arranged on the outer walls of the ladder sleeves; the ladder surfaces on the two sides of the inner walls of the pole shoes are respectively matched with the ladder surfaces on the outer walls of the two ladder sleeves, a chink is reserved between the ladder surfaces on the two sides of the inner walls of the pole shoes and the ladder surfaces on the outer walls of the ladder sleeves, and sealing is formed through pouring magnetic fluid. The sealing device is simple in structure and high in sealing pressure-resistant capacity.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, in particular to a labyrinth magnetic fluid seal device. Background technique [0002] With the development of the economy, the sealing performance requirements of industrial equipment and other related fields are getting higher and higher. The traditional sealing method has been difficult to meet the sealing requirements of some special occasions. The development of magnetic fluid technology has promoted the development of magnetic fluid sealing technology. Magnetic fluid sealing technology is playing an increasingly important role in the sealing field. The development trend of ferrofluid seals requires the improvement of sealing reliability and sealing ability. When the external pressure of the ordinary magnetic fluid sealing device is greater than its rated pressure, the magnetic fluid seal fails, and the leakage of the magnetic fluid is large, which leads to its weak self-repair a...

Claims

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Application Information

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IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 杨小龙徐武彬高尚晗
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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