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Embedded permanent magnet type magnetic liquid sealing device

A sealing device and magnetic liquid technology, which is applied in the sealing of engines, mechanical equipment, engine components, etc., can solve the problems of low pressure resistance of sealing devices, weak magnetic field strength, poor sealing performance, etc., and achieve good sealing pressure resistance Effect

Active Publication Date: 2022-05-31
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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  • Embedded permanent magnet type magnetic liquid sealing device
  • Embedded permanent magnet type magnetic liquid sealing device
  • Embedded permanent magnet type magnetic liquid sealing device

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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] like 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 pole o...

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Abstract

The invention relates to the technical field of mechanical engineering sealing, in particular to an embedded permanent magnet type magnetic liquid sealing device. The embedded permanent magnet type magnetic liquid sealing device includes a housing, a rotating shaft, a pole piece and a permanent magnet. The casing defines a chamber, and the rotating shaft is rotatably arranged in the chamber. The pole piece is sheathed on the rotating shaft, 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 is arranged on the rotating shaft, and the permanent magnet has an N pole and an S pole oppositely arranged on the inside and outside direction, and the magnetic poles at the outer end of the permanent magnet and the magnetic poles at the inner end of the pole shoe have different names. The embedded permanent magnet type magnetic liquid sealing device according to the embodiment of the present invention has the advantages of good sealing pressure resistance performance 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 Patents(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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