A buffer type magnetic fluid sealing device

A magnetic fluid sealing, permanent magnet technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of reducing equipment cost, unfavorable sealing structure, high energy consumption, etc., to improve the overall pressure resistance and expand safety. Working range, avoid the effect of uneven pressure difference

Active Publication Date: 2018-03-27
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art only provides a chamber on the low-pressure side of the sealing device, and the external gas is passed into the pressure-regulating chamber on the low-pressure side to balance the pressure on both sides of the magnetic fluid inside the sealing device. A comb structure is provided on the magnet or other sealing structure, so that the charged gas forms a pressure in the comb sealing chamber to balance the sealed high-pressure medium gas. Setting the comb is not conducive to simplifying the sealing structure, and when the high pressure side and the low pressure side In the case of multiple sealing rings, it is difficult to ensure the air pressure balance on both sides of each sealing ring if only one pressure regulating chamber is provided on the low pressure side, which is not conducive to improving the overall pressure resistance of the sealing device
The solution still exists in the prior art is to set an air outlet and an air inlet on the sealing device, and the air inlet is connected to the pressure regulating chamber on the low-pressure side. This method needs to continuously fill the inside of the sealing device with pressure regulating gas. Dynamic pressure regulation, this method consumes a lot of energy, which is not conducive to reducing equipment costs

Method used

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  • A buffer type magnetic fluid sealing device

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 The cushioning magnetic fluid sealing device shown includes a shaft 1, a casing 2, an outer pole shoe ring 3, a gas storage bottle 6, an inner pole shoe ring 11, and a permanent magnet 12. The shaft 1 is installed in the casing 2, and the casing The cross section of 2 and the cross section of shaft 1 are concentric circles, the outer pole shoe ring 3 is installed on the inner wall of the housing 2; the inner pole shoe ring 11 is provided with two or more groups, and is set on the shaft 1 at intervals. , located within the coverage of the outer pole shoe ring 3, the inner pole shoe ring 11 extends toward the inner wall of the outer pole shoe ring 3 along the radial direction of the shaft 1, leaving a gap between it and the inner wall of the outer pole shoe ring 3; A permanent magnet 12 is provided in the space between two adjacent inner pole sho...

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Abstract

The invention relates to the technical field of mechanical engineering sealing and particularly relates to a buffer type magnetic fluid sealing device. The buffer type magnetic fluid sealing device comprises a shaft, a shell, an outer pole shoe ring, a gas storage cylinder, a plurality of inner pole shoe rings and permanent magnets, wherein the inner pole shoe rings are mounted on the shaft at intervals, the permanent magnets are mounted in gapsreserved by the inner pole shoe rings, and the radial heights of the permanents are less than the radial heights of the inner pole shoe rings in the radial direction of the shaft; the outer pole shoe ring is arranged on the outer side of outer ring surfaces of the inner pole shoe rings, and gaps are formed between the inner wall of the pole shoe ring and the outer walls of the pole shoe rings; through holes I and through holes II are respectively formed in the outer pole shoe ring and the shell along the same radial direction; and the gas storage cylinder is arranged outside the shell and is in tight connection with the through holes I and the through holes II through flexible pipes. The buffer type magnetic fluid sealing device has high pressure resistance and reliable sealing performance.

Description

technical field [0001] The invention relates to the technical field of mechanical engineering sealing, in particular to a buffer type magnetic fluid sealing device with high pressure resistance. Background technique [0002] Ferrofluid seals are widely used in various industries due to their advantages of zero leakage, no wear, long life, simple structure and high reliability, among which the zero leakage performance is difficult to achieve by other sealing forms. However, when the ferrofluid seal is used in high-pressure conditions, the seal failure caused by the excessive pressure difference on both sides of the ferrofluid is an urgent problem to be solved by the ferrofluid seal device. Usually, the pressure of the medium to be sealed is relatively high. If all the pressure of the medium to be sealed is resisted by the magnetic fluid sealing device, the volume and strength of the magnetic fluid sealing device are required to be very high, resulting in a very large volume. ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor杨小龙孙康康
OwnerGUANGXI UNIVERSITY OF TECHNOLOGY