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Magnetic liquid sealing device

A technology of magnetic liquid and sealing device, applied in the direction of engine seal, bearing, bearing components, etc., can solve the problems of high sealing performance, long service life, seal failure, etc., to improve sealing, reduce loss and prolong service life Effect

Active Publication Date: 2021-01-05
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the embodiment of the present invention proposes a magnetic liquid sealing device, which can simultaneously solve the problem of large starting torque at low temperature and sealing failure caused by volatilization of the magnetic liquid base carrier liquid at high temperature, and has high sealing performance and long service life

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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] A magnetic liquid sealing device 100 according to an embodiment of the present invention will be described below with reference to the drawings.

[0029] Such as figure 1 As shown, the magnetic liquid sealing device 100 according to the embodiment of the present invention includes a housing 1 , a shaft 2 , a first sleeve 3 , a plurality of pole pieces 4 and a permanent magnet 5 .

[0030] The shaft 2 runs through the casing 1 rotatably. The shell 1 can be set on the tank body of the reactor or the tank of the stirring tank through bolts, so as to seal the liquid in the reactor or the stirring tank, and the shaft 2 is connected with the stirring shaft of ...

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Abstract

The invention discloses a magnetic liquid sealing device. The magnetic liquid sealing device comprises a shell, a shaft, a first shaft sleeve, a plurality of pole shoes and a permanent magnet. The shaft rotatably penetrates through the shell, the first shaft sleeve is made of a magnetic conductive material, the size of the first shaft sleeve can be changed along with the change of the temperaturein the shell, the first shaft sleeve is arranged on the shaft in a sleeving manner, the pole shoes are arranged on the shaft and the first shaft sleeve in a sleeving manner, and a plurality of pole teeth arranged at intervals in the axial direction of the shaft are arranged on the inner circumferential surfaces of the pole shoes; the shaft and one part of the pole teeth are arranged at intervals in the radial direction of the shaft to form a first interval, the first shaft sleeve and the other part of the pole teeth are arranged at intervals in the radial direction of the shaft to form a second interval, magnetic liquid with small base carrier liquid molecular weight is arranged in the first interval, and magnetic liquid with large base carrier liquid molecular weight is arranged in the second interval; and the permanent magnet is arranged in the shell and sleeves the shaft. The magnetic liquid sealing device can effectively solve the problems of large low-temperature starting torque and sealing failure caused by volatilization of the magnetic liquid-based carrier liquid at high temperature.

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 seals are widely used in the aviation field because of their advantages such as zero leakage, long life, and high reliability. [0003] In the related art, when the magnetic liquid is started in a low temperature environment, the starting torque of the sealing device is large due to the high viscosity at low temperature, resulting in a large energy loss. Moreover, after the magnetic liquid sealing device works for a period of time, the high-speed rotation of the shaft will easily cause the temperature of the magnetic liquid to rise, and the base carrier liquid of the magnetic liquid will easily volatilize, resulting in failure of the magnetic liquid seal. Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related art at...

Claims

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Application Information

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IPC IPC(8): F16J15/43
CPCF16J15/43F16C33/765F16C33/782F16C19/54F16C33/82
Inventor 李德才刘霄李泽鹏
Owner TSINGHUA UNIV
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