Mixed tooth split type magnetofluid seal device

Abstract

The invention relates to a mixed tooth split type magnetofluid seal device. The mixed tooth split type magnetofluid seal device comprises a stepped shaft, a shell, pole shoe rings, a sectioning non-magnetizer ring and permanent magnet rings. The inner wall of the shell is provided with the sectioning non-magnetizer ring. The stepped shaft is arranged in the inner ring face of the sectioning non-magnetizer ring in a sleeved manner. The outer circle faces of the stepped shaft correspond to the inner ring faces of the sectioning non-magnetizer ring. Each of the inner ring faces of the sectioningnon-magnetizer ring is provided with the corresponding pole shoe rings and the corresponding permanent magnet ring making contact with the pole shoe rings. Gaps are reserved between the pole shoe rings and the corresponding outer circle faces of the stepped shaft and between the permanent magnet rings and the corresponding outer circle faces of the stepped shaft. The pole shoe rings are provided with pole teeth, the pole teeth extend towards the outer circle faces or the end face of the stepped shaft in the radial direction, gaps are reserved between the pole teeth and the outer circle faces or the end face of the stepped shaft, and the magnetofluid is arranged in the gaps. The mixed tooth split type magnetofluid seal device can solve the problems that an existing sealing device is low inpressure resisting performance, and magnetism leakage happens to an inner magnetic field of the sealing device.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, and in particular relates to a hybrid tooth split type magnetic fluid seal device. Background technique [0002] When the magnetic fluid sealing technology is applied in the high-speed, heavy-load and high-precision sealing environment, the magnetic fluid in the sealing gap often fails because the sealing gap is too large. Therefore, improving the pressure resistance performance of the large-gap ferrofluid seal and reducing the magnetic flux leakage of the magnetic field in the ferrofluid seal are current research hotspots. [0003] One of the methods to improve the pressure resistance performance of the magnetic fluid seal under large gaps is to improve the structure of the magnetic fluid seal, such as the sealing device described in reference 1 (patent publication number CN203926794U). Although the sealing device described in the above literature has greatly improved the sealing per...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a hybrid tooth split magnetic fluid sealing device, so as to solve the problems of low pressure resistance and magnetic field leakage in the sealing device existing in the existing sealing device, so that the sealing technology can be successfully applied to high-speed heavy-duty load and other fields

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