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Magnetic liquid sealing device with embedded permanent magnet

A technology of sealing device and magnetic liquid, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of low pressure resistance capacity of sealing device, weak magnetic field strength, and inability of magnetic liquid to provide sufficient magnetic field strength, etc., to achieve sealing Good effect of pressure resistance

Active Publication Date: 2021-04-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the larger sealing gap makes the magnetic field strength at the sealing gap weaker, which cannot provide sufficient magnetic field strength for the magnetic liquid at the sealing gap, which makes it difficult for the magnetic liquid at the sealing gap to be firmly adsorbed at the sealing gap, and then The magnetic liquid sealing device that causes a large gap has low pressure resistance and poor sealing performance

Method used

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  • Magnetic liquid sealing device with embedded permanent magnet
  • Magnetic liquid sealing device with embedded permanent magnet
  • Magnetic liquid sealing device with embedded permanent magnet

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Embodiment Construction

[0026] 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.

[0027] Such as Figure 1-Figure 4 As shown, the embedded permanent magnet type magnetic liquid sealing device 100 according to the embodiment of the present invention includes a housing 1 , a rotating shaft 2 , a pole piece and a permanent magnet 5 . The casing 1 defines a chamber 103 , and the rotating shaft 2 is rotatably disposed in the chamber 103 . The pole piece is sheathed on the rotating shaft 2, and the pole piece is made of permanent magnet material, and the pole piece has an N pole and an S pole opposite in the inner and outer directions. The permanent magnet 5 is arranged on the rotating shaft 2, and the permanent magnet 5 has an N pole and an S pol...

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Abstract

The invention relates to the technical field of mechanical engineering sealing, in particular to a magnetic liquid sealing device with an embedded permanent magnet. The magnetic liquid sealing device with the embedded permanent magnet comprises a shell, a rotating shaft, a pole shoe and the permanent magnet. A cavity is defined by the shell, and the rotating shaft is rotatably arranged in the cavity. The pole shoe is arranged on the rotating shaft in a sleeving manner, is made of permanent magnet materials and is provided with an N pole and an S pole which are opposite in the inner-outer direction. The permanent magnet is arranged on the rotating shaft and is provided with an N pole and an S pole which are oppositely arranged in the inner-outer direction, and the magnetic pole at the outer end of the permanent magnet and the magnetic pole at the inner end of the pole shoe are unlike magnetic poles. The magnetic liquid sealing device with the embedded permanent magnet has the advantages of being good in sealing pressure resistance and the like.

Description

technical field [0001] The invention relates to the technical field of mechanical engineering sealing, in particular to an embedded permanent magnet type 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. The magnetic liquid sealing device in the related art includes a housing, a pole piece, a permanent magnet and a rotating shaft, and a sealing gap is formed between the pole piece and the rotating shaft, and the sealing gap is 0.1mm-0.2mm. Under the action of a magnetic field, the magnetic liquid is filled in the sealing gap, and the nanometer-sized ferromagnetic particles in the magnetic liquid can be suspended st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 李德才任思杰韩鹏栋李英松
Owner TSINGHUA UNIV
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