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Inflatable magnetic liquid rotating seal device

A magnetic liquid, rotary sealing technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve problems such as safety hazards, hydrogen and air easily form explosive gases, etc.

Inactive Publication Date: 2014-02-05
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is that when the existing magnetic liquid rotary sealing device seals high-risk gas, such as hydrogen, because the magnetic liquid seal has a certain amount of leakage, hydrogen and air are easy to form explosive gas, and there is a certain potential safety hazard

Method used

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  • Inflatable magnetic liquid rotating seal device

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Embodiment Construction

[0018] The present invention will be further described with accompanying drawing as specific embodiment:

[0019] Gas-filled magnetic liquid rotary seals, such as figure 1 , the sealing device includes: gasket 1, housing 2, first pole piece 3, first permanent magnet 4, second pole piece 5, second permanent magnet 6, third pole piece 7, third permanent magnet 8, fourth Pole shoe 9, screw 10, retaining ring 11, circlip 12, shaft sleeve 13, fourth rubber sealing ring 14, third air channel 15, third air pressure control valve 16, third rubber sealing ring 17, second air pressure control valve Valve 18, second air channel 19, second rubber sealing ring 20, first air pressure control valve 21, first air channel 22, first rubber sealing ring 23, rubber sealing ring 24.

[0020] Connections between the parts making up the device:

[0021] The first rubber sealing ring 23 is installed in the groove on the outer circle of the first pole shoe 3 to form a first pole shoe with a rubber s...

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Abstract

The invention discloses an inflatable magnetic liquid rotating seal device, belongs to the field of mechanical engineering seal and solves the potential safety hazard problem caused by gas leakage when the existing magnetic liquid seal device is used for sealing high-hazardous gas, i.e., hydrogen, under a complicated working condition. The device comprises a shell, pole shoes, rubber seal rings, magnetic liquid, permanent magnets, a shaft sleeve, a check ring, a gasket, air pressure control valves and other parts. According to the magnetic liquid seal device, a cavity between the inner diameter of the first permanent magnet and the outer diameter of the shaft sleeve is vacuumized, CO2 or inert gas is filled in a cavity between the inner diameter of the second permanent magnet and the outer diameter of the shaft sleeve, and a cavity between the inner diameter of the third permanent magnet and the outer diameter of the shaft sleeve is vacuumized, so that hazardous gas, especially explosive gas, cannot be in direct contact with air, and potential safety hazard problems can be solved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering sealing. Background technique [0002] Magnetic liquid sealing technology has been gradually used by more and more industries due to its advantages of zero leakage, no wear, long life and simple structure. Typical structures of existing magnetic liquid rotary sealing devices are described in patent applications with publication numbers CN 102518811A and CN 202091519U. When the existing magnetic liquid rotary sealing device seals high-dangerous gas, such as hydrogen, because the magnetic liquid seal has a certain amount of leakage, hydrogen and air are likely to form explosive gas, which inherently has certain potential safety hazards. Contents of the invention [0003] The technical problem to be solved in the present invention is that when the existing magnetic liquid rotary sealing device seals high-risk gas, such as hydrogen, due to the certain leakage of the magnetic liquid seal, hydro...

Claims

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Application Information

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IPC IPC(8): F16J15/43
Inventor 李德才姚杰
Owner BEIJING JIAOTONG UNIV
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