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Reciprocating sealing device for hydraulic cylinder magnetic fluid

A sealing device and ferrofluid technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of low utilization rate of magnetic fluid, low pressure resistance, etc., to expand the safe working range, increase the magnetic field gradient difference, cost reduction effect

Active Publication Date: 2019-03-22
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new hydraulic cylinder magnetic fluid reciprocating sealing device, using a plurality of permanent magnets to provide a magnetic source, and setting a non-magnetic ring in the space surrounded by the pole piece, the permanent magnet, the pole piece and the shaft, Pole teeth are set on the non-magnetic ring, so as to solve 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, and at the same time solve the problem of using the magnetic fluid in the existing magnetic fluid sealing device low rate problem

Method used

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  • Reciprocating sealing device for hydraulic cylinder magnetic fluid

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing.

[0028] Such as figure 1 As shown, the hydraulic cylinder ferrofluid reciprocating sealing device includes a housing 2, a pole shoe ring 3, a permanent magnet ring 4, a non-magnetic conductive ring 5, and a magnetic isolation ring 6;

[0029] There are multiple pole shoe rings 3 and magnetic isolation rings 6, which are arranged alternately on the inner wall of the housing 2 in the axial direction; the outer edge of the left end surface of the pole shoe ring 3 is provided with a radial ring I7, A radial ring II8 is provided on the outer edge of the right end face of the pole shoe ring 3; among the two adjacent pole shoe rings 3, the radial ring I7 on the right pole shoe ring 3 and the left pole shoe ring 3 The radial rings II8 on the top are close to each other, and a magnetic isolation ring 6 is arranged between them; the inner circular surface of the pole shoe ring 3 is c...

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Abstract

The invention relates to a reciprocating sealing device for hydraulic cylinder magnetic fluid. The reciprocating sealing device for the hydraulic cylinder magnetic fluid comprises a shell, pole shoe rings, permanent magnet rings, non-magnetic conductive rings and magnetic isolation rings. According to the reciprocating sealing device for the hydraulic cylinder magnetic fluid, a magnetic source isprovided through multiple permanent magnets, the non-magnetic conductive rings are arranged in a space formed by pole shoes, the permanent magnets and shafts in an enclosing mode, the non-magnetic conductive rings are provided with pole teeth, therefore, the problem that the pressure resistance of an existing single-magnetic-source magnetic fluid sealing device and an existing multi-magnetic-source magnetic fluid sealing device is low is solved, and meanwhile the problem that the magnetic fluid utilization rate of an existing magnetic fluid sealing device is low is solved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, in particular to a magnetic fluid reciprocating seal device for a hydraulic cylinder. Background technique [0002] Ferrofluid, also known as ferrofluid, is a solid-liquid two-phase colloidal material that is made of magnetic nanoparticles that are specially treated and then evenly dispersed into a liquid and mixed with it. On the one hand, it has the fluidity and lubricity of a liquid. On the other hand, it has the strong magnetism of solid nanoparticles. The magnetic fluid seal is realized by utilizing the ability of the magnetic fluid to bear the pressure difference under the action of an external magnetic field. Nowadays, the sealing technology is not perfect, and there are still many defects, such as easy leakage, low pressure resistance and so on. With the advancement of science and technology, the requirements for sealing in some fields are getting higher and higher, and the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 杨小龙郝付祥宾仕博
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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