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Magnetic liquid sealing device

A technology of sealing device and magnetic liquid, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of increasing the size and weight of sealing structural parts, improve the gradient of magnetic flux density distribution, solve the difficulty of processing and manufacturing, and use convenient effect

Active Publication Date: 2007-02-14
NO 52 INST OF CHINA NORTH IND GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Of course, the sealing performance requirements of the large sealing gap can be met by increasing the size of the magnetic liquid sealing magnetic gathering structure, but generally speaking, this will increase the size and weight of the sealing structure exponentially by the third power of the sealing gap, which means It is not advisable for some weapon systems that require high structural size and weight

Method used

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  • Magnetic liquid sealing device
  • Magnetic liquid sealing device
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Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1 as Figure 1~3 As shown, the dual stacked magnetic pole coils are composed of outer magnetic pole coils 7 and inner magnetic pole coils 9 stacked on the inner and outer sleeves, and are directly installed between coaxial rotating bodies and arranged in alignment with each other. The outer magnetic pole ring 7 and the inner magnetic pole ring 9 of the optimal scheme are respectively composed of 6 to 10 outer and inner pole shoe rings and outer and inner permanent magnetic rings whose number of outer and inner pole shoe rings is minus one. The outer magnetic pole ring 7 of this embodiment 1 is composed of 6 outer pole shoe rings 3 and 5 outer permanent magnetic rings 2 arranged alternately, forming a relationship of ‖N-S‖S-N‖N-S‖S-N‖N-S‖; the inner magnetic pole ring 9 is also composed of Composed of 6 inner pole shoe rings 3a and 5 inner permanent magnet rings 2a arranged alternately, forming the relationship of ‖S-N‖N-S‖S-N‖N-S‖S-N‖, the outer and inner perman...

Embodiment 2

[0028] Example 2 as Figure 4 As shown, it is a set superposition type with a non-magnetic ferrule, the structure is basically the same as that of embodiment 1, the difference is that the outer magnetic pole coil 7 and the inner magnetic pole coil 9 of the dual stack pass through the outer non-magnetic permeable sleeve respectively. The ring 10 and the inner non-magnetic ferrule 10a are hermetically assembled with the relatively rotatable coaxial rotary body, so that it can not only be used for the magnetic liquid seal of the non-magnetic rotary body, but also realize the magnetic liquid seal of the magnetic conductive rotary body .

Embodiment 3

[0029] Example 3 as Figure 5 As shown, its composition is basically the same as that of Example 1, the difference is that the outer and inner pole rings 7 and 9 of the dual stack are respectively provided with outer poles on the sealing gaps 8 of the outer and inner pole rings 3 and 3a Teeth 11 and inner pole teeth 11a to further improve sealing performance.

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Abstract

A sealing device with magnetic liquid is prepared as forming magnetic pole ring by jacketing and superposing external and internal magnetic pole rings or by butt-joint and superposing top and bottom magnetic pole rings, setting adjacent and near permanent magnetic ring used for forming said magnetic pole ring to be at opposite polarity, sealing and erecting dual-superposed magnetic pole rings separately between coaxial gyrorotors to form seal gap for filling in magnetic liquid to realize magnetic liquid seal.

Description

technical field [0001] The invention relates to the technical field of magnetic liquid sealing, and is especially suitable for the "nuclear", "raw" and "chemical" seal protection of large, medium and small rotators, wading seals, anti-high air pressure and temperature changes, and anti-frost It is also suitable for general vacuum sealing and dust-proof sealing technical fields such as low-rotation resistance sealing technology fields with high lightweight requirements. Background technique [0002] The magnetic liquid seal is an advanced dynamic sealing method that uses a local strong magnetic field and a magnetic liquid to block the sealing gap. The current magnetic liquid seal generally adopts a set structure, which is mainly composed of a pole shoe ring, a permanent magnetic ring, a magnetic shaft or a magnetic ring. (Its rotating shaft generally also plays the role of magnetic conduction) and other components. The existing magnetic liquid seal has a magnetic gathering st...

Claims

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Application Information

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IPC IPC(8): F16J15/43
Inventor 李国斌赵宝荣杨润田殷涛曹学军刘智勇闫薇
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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