Step-type magnetofluid sealing device

A ferrofluid sealing, stepped technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problem of low pressure resistance, achieve enhanced pressure resistance, improve pressure resistance and sealing reliability, increase The effect of secondary pressure bearing capacity and self-healing capacity

Active Publication Date: 2018-05-22
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a stepped magnetic fluid sealing device, so as to solve the problem of low pressure resistance existing in the existing 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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  • Step-type magnetofluid sealing device

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] see figure 1 , a stepped magnetic fluid sealing device, including a shaft 1, a housing 2, a sealing ring 7, a pole shoe 6, a magnetic fluid and a permanent magnet 8, the shaft 1 passes through and extends beyond both ends of the housing 2, so The shaft 1 includes a stepped shaft part located in the housing 2. The middle step diameter of the stepped shaft part is the largest, and the diameters of the steps on the left and right sides decrease successively. The stepped shaft part has a plurality of shafts parallel to the shaft. The first side 9 of the axis of 1 and a plurality of second sides 10 perpendicular to the axis, the inner surface of the housing 2 is provided with at least two pole shoes 6, and a pole shoe 6 is provided between adjacent two pole shoes 6 The ring-shaped permanent magnet 8, the pole piece 6 is an annular structure, the sealing ri...

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Abstract

The invention discloses a step-type magnetofluid sealing device. The step-type magnetofluid sealing device comprises a shaft, an outer shell, pole shoes, magnetofluid and permanent magnets. The shaftpenetrates through the outer shell and extends out of two ends of the outer shell. The shaft comprises a stepped shaft part located in the outer shell. The diameter of a middle step of the stepped shaft part is the maximum, and the diameters of the steps on the left side and the right side of the stepped shaft part are gradually reduced. The stepped shaft part is provided with a plurality of firstside surfaces parallel to the axis of the shaft and a plurality of second side surfaces perpendicular to the axis. The at least two pole shoes are arranged on the inner surface of the outer shell. Each annular permanent magnet is arranged between every two adjacent pole shoes. Each pole shoe is provided with radial pole teeth protruding towards the first side surfaces and axial pole teeth protruding towards the second side surfaces, wherein the radial pole teeth and the axial pole teeth are all annular, and the magnetofluid is arranged between the radial pole teeth and the first side surfacesas well as between the axial pole teeth and the second side surfaces. The sealing pressure resistance of the magnetofluid is greatly improved, and the problem that an existing sealing device can notmeet the high sealing performance requirement under special work conditions like high speed and heavy loads is solved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering sealing, and in particular relates to a stepped magnetic fluid sealing device capable of maintaining good sealing performance under high-speed and heavy-load working conditions. Background technique [0002] Compared with traditional sealing technology, magnetic fluid sealing technology has the advantages of zero leakage rate, no solid friction, long life, high reliability, etc., and has been widely used in various industries. When the magnetic fluid sealing technology is applied in a large diameter, high speed and heavy-duty sealing environment, 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 large gap is the current research One of the hot issues. [0003] One of the methods to improve the pressure resistance performance of the magnetic fluid seal under large gap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 杨小龙陈帆孙彭郝付祥谢国进
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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