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Obliquely magnetized magnetic liquid sealing structure

A technology of magnetic liquid and sealing structure, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of high space occupation, wear and damage, and increase of axial size.

Active Publication Date: 2021-03-16
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the pressure difference in the working condition is high, due to the limitation of the performance of the permanent magnet, the pressure resistance of the general sealing structure often cannot meet the demand
If the pressure resistance is improved only by increasing the number of sealing stages, the increase in the number of pole teeth will lead to uneven distribution of the magnetic liquid among the pole teeth, which will reduce the efficiency of the use of permanent magnet magnetic energy. At the same time, the axial dimension will be greatly increased, and the space will be high. The use effect of magnetic liquid seal
In addition, too many tooth grooves will increase the difficulty of processing, and it is easy to wear and damage during installation, resulting in seal failure

Method used

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  • Obliquely magnetized magnetic liquid sealing structure

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Embodiment Construction

[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] Such as figure 1 As shown, the embodiment of the present invention proposes a magnetic liquid sealing structure with oblique magnetization, including: shaft 1, retaining ring 2, end cover 3, first bearing 4, first magnetic isolation ring 5, first pole shoe 6. The first magnetic isolation piece 7, the permanent magnet 8, the second magnetic isolation piece 9, the second pole shoe 10, the axial protrusion 101, the second magne...

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Abstract

The invention provides an obliquely magnetized magnetic liquid sealing structure. The structure comprises a shaft (1), a check ring (2), an end cover (3), a first bearing (4), a first magnetic isolation ring (5), a first pole shoe (6), a first magnetic isolation sheet (7), a permanent magnet (8), a second magnetic isolation sheet (9), a second pole shoe (10), an axial bulge (101), a second magnetic isolation ring (11), a second bearing (12), a shaft shell (13) and magnetic liquid (14). The magnetic liquid sealing structure is high in pressure resistance, low in axial size and uniform in magnetic field intensity among all stages of seals, and the defects of a magnetic liquid multi-stage sealing structure are overcome.

Description

technical field [0001] The invention relates to the technical field of mechanical engineering sealing, in particular to a magnetic liquid sealing structure with oblique magnetization. Background technique [0002] Magnetic liquid seal is a non-contact sealing form using new nano-materials. It utilizes the characteristics of magnetic liquid with both fluidity and magnetic field controllability. By designing an appropriate alveolar structure, the magnetic liquid is bound in the sealing gap. Multiple "O"-shaped liquid sealing rings are formed to make it have anti-leakage ability and certain pressure-resistant ability. This sealing form has the advantages of extremely low leakage rate, long life and low wear, and is widely used in various high-tech industries. [0003] The traditional magnetic liquid seal structure generally uses a permanent magnet magnetized in one direction in the axial direction, and pole shoes are installed on the left and right sides. An "O"-shaped liquid...

Claims

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Application Information

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IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 李德才赵文曦李子贤
Owner TSINGHUA UNIV
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