Magnetic liquid sealing device

A magnetic liquid and sealing device technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of magnetic liquid stability decline, sealing device failure, separation of magnetic particles and base carrier liquid, etc., to achieve rapid response, Achieve the effect of sealing effect
CN112648382AActive Publication Date: 2021-04-13TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2021-04-13

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Abstract

The invention discloses a magnetic liquid sealing device. The device comprises a shell, a rotating shaft, a shaft sleeve, a plurality of pole shoes and a permanent magnet, wherein a cavity is formed in the shell, the rotating shaft is rotatably arranged in the cavity, the shaft sleeve is arranged on the rotating shaft in a sleeving mode so as to rotate along with the rotating shaft, the multiple pole shoes are arranged at intervals in the axial direction of the rotating shaft, the shaft sleeve is sleeved with the pole shoes, a plurality of pole teeth extending in the circumferential direction of the pole shoes are arranged on the inner circumferential surfaces of the pole shoes, the multiple pole teeth are arranged at intervals in the axial direction of the pole shoes, the rotating shaft is sleeved with the permanent magnet, circumferential grooves are formed in the outer circumferential surface of the shaft sleeve, and the axial position of the shaft sleeve along the rotating shaft is adjustable so that the circumferential grooves can face or deviate from the pole teeth of the pole shoes. The magnetic liquid sealing device has the advantages of being simple in structure, high in reliability and capable of storing liquid for a long time.
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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] At present, when magnetic liquid seals are used, due to the requirements of working conditions, when the magnetic liquid seal device is stored for a long time or used again after a long period of time, the magnetic liquid will slowly settle under the action of the magnetic field, which will eventually lead to the magnetic properties of the magnetic liquid. Particles separate from the base carrier fluid, leading to failure of the seal. Therefore, the long-term storage of the magnetic liquid seal and the problem of the decrease in the stability of the magnetic liquid caused by parking have to be solved. Contents of the invention

[0003] The present invention is based on the inventor's discovery and recognition of the following facts and problems:

[0004] If the existing magnetic liquid seal...

Claims

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