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Magnetic source mixing type magnetofluid sealing structure

A ferrofluid seal, hybrid technology, applied in the direction of engine seals, engine components, mechanical equipment, etc., can solve the problems of wasting cost, increasing the volume of ferrofluid seal structure, etc.

Active Publication Date: 2018-11-23
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the multi-stage sealing structure, since the magnetic fluid seal on the low-pressure side cannot function, setting too many stages of pole pieces will only increase the volume of the magnetic fluid sealing structure and waste more costs

Method used

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  • Magnetic source mixing type magnetofluid sealing structure

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Effect test

Embodiment Construction

[0027] Such as figure 1 As shown, a magnetic source hybrid magnetic fluid sealing structure includes a hollow shell 2, one end of which is closed and the other end is open. A through hole is opened in the center of the closed end face of the housing 2 , and a shaft 1 penetrating from the through hole to the inner chamber of the housing 2 is also included.

[0028] In the space between the outer surface of the shaft 1 and the inner wall of the housing 2, a plurality of pole pieces 3 are axially spaced apart. The pole shoe 3 is ring-shaped, and the outer surface of the pole shoe 3 abuts against the inner wall of the housing 2 .

[0029] An axially magnetized permanent magnet ring 7 is sandwiched between two adjacent pole pieces 3 . The polarities of the magnetic poles of two adjacent axially magnetized permanent magnet rings 7 are opposite.

[0030] A radially magnetized permanent magnet ring 8 is sheathed on the inner surface of each pole piece 3 . There is a gap between th...

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Abstract

The invention discloses a magnetic source mixing type magnetofluid sealing structure. The magnetic source mixing type magnetofluid sealing structure comprises a shell, a shaft and a plurality of poleshoes, wherein the pole shoes are arranged in the axial direction at intervals; an axial magnetizing type permanent magnet ring is sandwiched between each two adjacent pole shoes; the polarities of magnetic poles of each two adjacent axial magnetizing type permanent magnet rings are opposite; a radial magnetizing type permanent magnet ring is inserted in the inner circle surface of each pole shoe;a gap exists between the inner circle surface of each radial magnetizing type permanent magnet ring and the outer surface of the shaft and is injected with magnetofluid; the polarities of magnetic poles of each two adjacent radial magnetizing type permanent magnet rings are opposite; each radial magnetizing type permanent magnet ring is positioned in a magnetic loop formed by the corresponding axial magnetizing type permanent magnet ring and the pole shoes on the two sides of the corresponding axial magnetizing type permanent magnet ring; and the magnetic field direction of each radial magnetizing type permanent magnet ring is the same as the direction of the magnetic loop in which the radial magnetizing type permanent magnet ring is located. The magnetic field intensity is increased, sealing and pressure-resistant pressure are enhanced, magnetofluid seals in all the gaps can play a role, and the sealing pressure resistance is ensured.

Description

technical field [0001] The invention belongs to mechanical engineering sealing technology, in particular to a magnetic source mixed magnetic fluid sealing structure. Background technique [0002] The existing magnetic fluid sealing structure for the reciprocating movement of the shaft generally includes a housing with a hollow cavity, a shaft, a permanent magnet and a pole shoe are arranged between the shaft and the housing for magnetic fluid sealing, and the inner ring of the pole shoe is provided with pole teeth. [0003] There are generally two ways to improve the pressure resistance performance of magnetic fluid seals: first, try to increase the magnetic field strength; second, increase the saturation magnetization of magnetic fluid. Most of the starting point is to consider increasing the magnetic field strength, but there is still room for further improvement of the existing magnetic fluid sealing performance. [0004] The inventor found experimentally that from the h...

Claims

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Application Information

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IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 杨小龙陈帆何美丽
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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