A magnetic fluid sealing device for a convex stepped shaft

A magnetic fluid seal, stepped shaft technology, applied in the direction of engine seals, mechanical equipment, engine components, etc., can solve the problems of low pressure resistance, reduce stress concentration, etc., achieve increased pressure resistance, reduce stress concentration, The effect of convenient production and processing

Active Publication Date: 2021-02-12
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a convex stepped shaft magnetic fluid sealing device, thereby solving the problem of low pressure resistance existing in the existing single magnetic source magnetic fluid sealing device and multi-magnetic source magnetic fluid sealing device, while reducing stress concentration, This makes the sealing technology successfully applied in high-speed and heavy-duty fields

Method used

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  • A magnetic fluid sealing device for a convex stepped shaft

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Embodiment Construction

[0022] 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.

[0023] Such as figure 1 As shown, a convex stepped shaft magnetic fluid sealing device includes a casing 2 with two ends open, a sealing assembly and an end cover 10 for pressing the sealing assembly into the casing 2; the sealing assembly includes a shaft 1, the The shaft 1 is rotatably installed in the housing 2 through a bearing, and the shaft 1 includes a convex stepped portion 101. The convex stepped portion 101 includes 5 steps arranged in sequence...

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Abstract

The invention relates to a magnetic fluid sealing device for a convex stepped shaft, comprising a casing, a sealing assembly and an end cover; the sealing assembly includes a shaft, the shaft is rotatably installed in the casing through a bearing, and the shaft includes at least one convex stepped portion, so The convex stepped portion includes a plurality of steps arranged in sequence along the axial direction, and the outer walls of adjacent steps are connected by an arc-shaped chamfer-shaped transition surface; The pole piece extends to one side or both sides of the transition surface to the position corresponding to the corresponding step on the side of the transition surface, and there is a gap between the inner wall of the pole piece and the corresponding transition surface and the step. Pole teeth are provided on the shaft corresponding to the inner wall of the pole piece; permanent magnets are arranged between adjacent pole pieces. The invention has the advantages of strong pressure resistance ability, secondary pressure bearing ability and self-repair ability, strong pressure resistance ability and sealing reliability of the magnetic fluid seal under the condition of large gap, and large safe working range.

Description

technical field [0001] The invention relates to a convex stepped shaft magnetic fluid sealing device, which belongs to the field of mechanical engineering sealing. Background technique [0002] The magnetic fluid seal is to use the magnetic fluid seal ring formed by the magnetic fluid under the action of a strong magnetic field to seal the gas and liquid. Since the seal shaft is contacted and sealed by the magnetic fluid, the seal shaft and the seal are avoided. The direct friction and the additional load are reduced. In addition, the magnetic fluid seal also has the characteristics of zero leakage, high reliability, and simple structure. Although the technology of ferrofluid in vacuum and low-pressure sealing has been relatively mature and widely used, there are still many problems unsolved in high-pressure gas and liquid sealing, such as the pressure of ferrofluid sealing is too small, the sealed The medium will cause the deterioration of the magnetic fluid and cause the ...

Claims

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Application Information

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