Magnetic liquid reciprocating sealing device

A magnetic liquid and sealing device technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems affecting the sealing performance and service life of the magnetic liquid reciprocating sealing device, and achieve the effect of improving the sealing effect and service life.

Active Publication Date: 2021-10-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the magnetic liquid reciprocating sealing device, due to the adhesion phenomenon between the magnetic liquid and the reciprocating shaft, the reciprocating shaft usually takes the magnetic liquid away from the seal during the movement process, resulting in the magnetic liquid in the sealing gap increasing with the working time. gradually decrease, which in turn affects the sealing performance and service life of the magnetic liquid reciprocating sealing device

Method used

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Embodiment Construction

[0027] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0028] Such as Figure 1-Figure 3 As shown, the magnetic fluid reciprocating seal device according to the embodiment of the present invention includes a housing 100 , a reciprocating shaft 200 , a power supply device (not shown in the figure) and a magnetic seal 300 .

[0029] Such as figure 1 and image 3 As shown, the housing 100 includes an outer peripheral wall 101 and a cavity 140 surrounded by the outer peripheral wall 101 , the cavity 140 includes a sealed cavity 150 filled with magnetic liquid.

[0030] Such as figure 1 and figure 2 As shown, the reciprocating shaft 200 passes through the housing 100 along its axial direction, and the reciprocating ...

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Abstract

The invention discloses a magnetic liquid reciprocating sealing device. The magnetic liquid reciprocating sealing device includes a housing, a reciprocating shaft, a power supply device and a magnetic seal. The housing has a sealing cavity filled with magnetic liquid, the reciprocating shaft is passed through the housing, the power supply device is connected to the reciprocating shaft, and the power supply device is used to pass axial current to the reciprocating shaft to generate The magnetic field weakens from the inside to the outside in the radial direction of the shaft. The magnetic seal is located in the sealing cavity, the magnetic seal is sleeved on the reciprocating shaft, and the inner peripheral surface of the magnetic seal is in contact with the reciprocating shaft. There is a sealing gap between the outer peripheral surfaces of the shafts, and the magnetic liquid is suitable to be adsorbed in the sealing gap under the magnetic force. The magnetic liquid reciprocating sealing device of the present invention uses a magnetic field to supplement the magnetic liquid into the sealing gap, which can improve the sealing effect and service life.

Description

technical field [0001] The invention relates to the technical field of sealing, in particular to a magnetic liquid reciprocating sealing device. Background technique [0002] Magnetic liquid sealing technology has the advantages of zero leakage, no wear, long life, and convenient maintenance. It has been widely used in different sealing occasions in military and civilian industries. [0003] However, in the magnetic liquid reciprocating sealing device, due to the adhesion phenomenon between the magnetic liquid and the reciprocating shaft, the reciprocating shaft usually takes the magnetic liquid away from the seal during the movement process, resulting in the magnetic liquid in the sealing gap increasing with the working time. And gradually reduce, and then affect the sealing performance and service life of the magnetic liquid reciprocating sealing device. Contents of the invention [0004] For this reason, the embodiment of the present invention proposes a reciprocating ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 李德才陈思宇李艳文
Owner TSINGHUA UNIV
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