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Magnetofluid sealing device

A ferrofluid seal and permanent magnet technology, which is applied to engine seals, engine components, mechanical equipment, etc., can solve the problems of low pressure resistance and achieve the effects of enhanced pressure resistance, simple structure, and expanded safe working range

Active Publication Date: 2018-03-23
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a magnetic fluid sealing device, so as to solve the problem of low pressure resistance existing in the existing single magnetic source magnetic fluid sealing device, so that the sealing technology can be successfully applied in the fields of high speed and heavy load

Method used

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Embodiment Construction

[0024] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. For the convenience of description, if the words "up", "down", "left" and "right" appear in the following, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

[0025] Such as figure 1 As shown, a ferrofluid sealing device includes a housing 2 with openings at both ends, a sealing assembly and an end cover 10 for pressing the sealing assembly into the housing 2; the sealing assembly includes a shaft 1, and the shaft 1 passes through The bearing is rotatably installed in the housing 2, the shaft 1 includes at least one recessed portion 101, the diameter of the recessed portion 101 first decreases and then increas...

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Abstract

The invention relates to a magnetofluid sealing device which comprises a shell, a sealing assembly and an end cover. The two ends of the shell are provided with openings, and the end cover is used forpressing the sealing assembly into the shell. The sealing assembly comprises a shaft, the shaft is rotationally installed in the shell through a bearing, the shaft comprises at least one concave portion, the outer side of the shaft is provided with split shoe poles, the concave portion is located in a cavity defined by the split shot poles, the shape of the outer wall of the split shot poles is matched with the appearance of the shaft corresponding portion, the split shoe poles are provided with a first permanent magnet and a second permanent magnet which are located on the two sides of the concave portion correspondingly, a gap is reserved between the inner wall of the split shoe poles and the outer wall of the shaft, and the inner wall of the split shoe poles is provided with pole teeth. Assembling is easy, the structure is simple, magnetofluid sealing pressure resistance is high, the secondary pressure bearing capacity and self-repair ability of the device are high, pressure resistance and sealing reliability under the large gap condition are good, the safe working range is large, and the requirements of occasions such as high-speed heavy load can be met.

Description

technical field [0001] The invention relates to a magnetic fluid sealing device. Background technique [0002] Due to the advantages of zero leakage, no wear, and low power consumption, magnetic fluid seals have been widely used in vacuum seals, toxic gas seals, and dust prevention abroad, and have solved many engineering problems with high sealing requirements. The research and application of ferrofluid has broad application prospects, and many unknown fields have yet to be developed. The magnetic fluid in the sealing gap often fails because the sealing gap is too large, so improving the pressure resistance of the magnetic fluid seal under the condition of a large gap is one of the hot issues in current research. [0003] One of the methods to improve the pressure resistance performance of the magnetic fluid seal under large gaps is to increase the number of pole teeth in the magnetic circuit of the magnetic fluid seal and improve the shape of the pole shoe, such as the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43F16J15/06
CPCF16J15/06F16J15/43
Inventor 杨小龙陈帆郝付祥孙彭何美丽
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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