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Magnetic liquid seal

A magnetic liquid and sealing device technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of poor sealing effect, magnetic liquid leaving the surface of the rotating shaft, etc., and achieve a good sealing effect

Active Publication Date: 2021-12-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the related art, when the magnetic liquid sealing device operates at a high speed, part of the magnetic liquid is likely to be separated from the surface of the rotating shaft due to centrifugal force, resulting in poor sealing effect

Method used

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  • Magnetic liquid seal
  • Magnetic liquid seal
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Embodiment Construction

[0035] 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.

[0036] Such as Figure 1-6 As shown, the magnetic liquid sealing device according to the embodiment of the present invention includes a housing 1 , a rotating shaft 2 , a pole shoe assembly 7 , a mass 4 , a connecting rod 5 , a first bearing 6 , and a reset member 9 .

[0037] The shell 1 is provided with an inner cavity. At least part of the rotating shaft 2 is rotatably fitted in the inner cavity, the rotating shaft 2 includes a transition section 21, the transition section 21 is located in the inner cavity, the transition section 21 has a first end and a second end, the cross section of the transition section 21 is along the The direction from the first end ...

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PUM

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Abstract

The invention discloses a magnetic liquid sealing device, which comprises a casing, a rotating shaft, a pole shoe assembly, a quality block, a connecting rod, a first bearing, a reset part, a magnetic liquid and the like. The rotating shaft passes through the casing, and the rotating shaft is provided with a gradual change section. The pole shoe assembly is sleeved on the outer peripheral wall of the gradual change section. The matching parts of the pole shoe assembly and the rotating shaft are filled with magnetic liquid. The component and the reset part are arranged in the casing in sequence along the axial direction. The mass block can be driven by the rotating shaft to use the centrifugal force to push the connecting rod and the first bearing to move, and further push the pole shoe assembly to move to the side where the diameter of the gradual change section increases. The sealing gap between the inner peripheral wall of the pole piece assembly and the outer peripheral wall of the transition section can be gradually reduced, the space for the magnetic liquid to move becomes smaller, and the internal pressure energy increases. The magnetic liquid sealing device of the present invention can automatically adjust the sealing gap, and has a good sealing effect under the working condition of high rotation speed.

Description

technical field [0001] The invention relates to the technical field of mechanical engineering sealing, in particular to a magnetic liquid sealing device. Background technique [0002] Magnetic liquid is a new type of functional material that appears with the development of science and technology. It has the magnetizable properties of magnetic materials and the flowability of liquids. Magnetic liquid sealing technology is used by more and more industries due to its advantages of zero leakage, no wear, long life and simple structure. In the related art, when the magnetic liquid sealing device operates at a high speed, part of the magnetic liquid is likely to leave the surface of the rotating shaft due to centrifugal action, resulting in poor sealing effect. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. [0004] For this reason, the embodiment of the present invention pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 李德才李英松刘霄韩鹏栋任思杰
Owner TSINGHUA UNIV