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Symmetrical double-step magnetic fluid sealing device

A ferrofluid seal and double-step technology, which is applied to engine seals, engine components, mechanical equipment, etc., can solve problems such as the decline in pressure resistance performance, achieve the effects of reducing impact, reducing losses, and expanding the safe working range

Active Publication Date: 2019-05-17
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a symmetrical double-step magnetic fluid sealing device, so as to solve the problem that the pressure resistance of the magnetic fluid sealing device decreases due to the eccentricity of the rotating shaft and the centrifugal force of the existing sealing device, so that the sealing technology can be successfully applied to large When the shaft diameter rotates

Method used

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  • Symmetrical double-step magnetic fluid sealing device

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Embodiment Construction

[0039]The present invention will be further described below in conjunction with accompanying drawing.

[0040] Such as figure 1 As shown, it includes a stepped shaft 1, a casing 2, a left pole shoe ring 3, a right pole shoe ring 5, a middle sleeve 7, and a middle permanent magnet ring 9;

[0041] The stepped shaft 1 includes a primary shaft 101 with the largest diameter and more than two groups of secondary shafts with successively decreasing diameters. The secondary shafts are arranged along the side of the primary shaft 101 to both sides in turn, with 1 The middle radial cross-section of the stage shaft 101 is left-right symmetrical;

[0042] The left one pole shoe ring 3, the middle permanent magnet ring 9, and the right one pole shoe ring 5 are sequentially set on the inner wall of the housing 2, and the right end face of the left one pole shoe ring 3 is in contact with the left end face of the middle permanent magnet ring 9 , the right end face of the middle permanent m...

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Abstract

The invention aims to provide a symmetrical double-step magnetic fluid sealing device. The symmetrical double-step magnetic fluid sealing device comprises a stepped shaft, a shell, a left first-stageshoe ring, a right first-stage shoe ring, an intermediate sleeve and an intermediate permanent magnet ring. The stepped shaft comprises a first-stage shaft with the largest diameter and more than twogroups of secondary-stage shafts with diameters reducing in sequence, the secondary-stage shafts are sequentially arranged to the two sides along the side surface of the first-stage shaft, and left and right symmetric is realized by taking the middle radial section of the first-stage shaft as a boundary. The problem of low pressure resistance of an existing sealing device is solved, so that the sealing technology can be successfully applied to fields such as high speed and heavy load.

Description

technical field [0001] The invention belongs to the field of mechanical engineering sealing, in particular to a symmetrical double-step magnetic fluid sealing device. Background technique [0002] In the case of magnetic fluid seals for large shaft diameter rotating shafts, the eccentricity caused by factors such as processing and assembly errors and vibrations leads to a decrease in the pressure resistance of the magnetic fluid seals; on the other hand, the performance of the magnetic fluid seals also decreases under the action of high-speed centrifugal force. Therefore, improving the pressure resistance of large-diameter magnetic fluid dynamic seals is one of the hot issues in current research. [0003] One of the methods to reduce the influence of the eccentricity of the rotating shaft on the pressure resistance performance of the magnetic fluid seal is to improve the structure of the magnetic fluid seal, such as the sealing device described in reference 1 (patent publica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43
Inventor 杨小龙张锐博邱敏敏
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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