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Fluid dynamic pressure type magnetic liquid seal device

A technology of magnetic fluid and fluid dynamic pressure, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., and can solve the problems of inability to achieve zero leakage and inability to seal high-pressure liquids.

Inactive Publication Date: 2014-04-30
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 the existing magnetic liquid sealing device cannot seal high-pressure liquid and the hydrodynamic pressure sealing device cannot achieve zero leakage when sealing high-pressure liquid, so a hydrodynamic pressure type magnetic liquid sealing device is proposed

Method used

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Embodiment Construction

[0021] to attach figure 1 The present invention will be further described for the specific embodiment:

[0022] A composite sealing device composed of a magnetic liquid seal combined with a fluid dynamic pressure seal, which comprises: a screw 1, an end cover 2, a first sealing ring 3, a circulation pipe inlet path 4, a magnetic liquid circulation system 5, and a circulation pipe outlet path 6 , the second sealing ring 7, the left pole shoe 8, the annular permanent magnet 9, the right pole shoe 10, the third sealing ring 11, the shell 12, the magnetic isolation ring 13, the threaded end cover 14, the shaft sleeve 15, the first set screw 16. Moving ring 17, second set screw 18, fourth sealing ring 19, fifth sealing ring 20, wedge-shaped fluid groove 21, shaft 22.

[0023] Constituting the connections between the parts of the device:

[0024] The second sealing ring 7 is embedded in the concave groove on the outer circumference of the left pole piece 8, and the third sealing r...

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Abstract

The invention relates to a fluid dynamic pressure type magnetic liquid seal device and belongs to the field of mechanical engineering seal. The fluid dynamic pressure type magnetic liquid seal device comprises a screw (1), an end cover (2), a first seal ring (3), a circulation tube inlet path (4), a magnetic liquid circulation system (5), a circulation tube outlet path (6), a second seal ring (7), a left pole shoe (8), an annular permanent magnet (9), a right pole shoe (10), a third seal ring (11), a shell (12), a magnetism isolation ring (13), a threaded end cover (14), a shaft sleeve (15), a first set screw (16), a movable ring (17), a second set screw (18), a fourth seal ring (19), a fifth seal ring (20), a wedge-shaped fluid slot (21) and a shaft (22). The fluid dynamic pressure type magnetic liquid seal device has the advantages that the high pressure resistance feature of fluid dynamic pressure seal and the zero leakage feature of magnetic liquid seal are utilized, fluid dynamic pressure magnetic liquid seal zero leakage is achieved, and the application range of magnetic liquid seal is widened.

Description

technical field [0001] The invention belongs to the field of mechanical engineering sealing. Background technique [0002] At present, magnetic liquid sealing technology can achieve zero leakage in sealing low-pressure liquid, but it is rarely used in sealing high-pressure liquid. Large, the phenomenon of interface instability is likely to occur at the sealing interface, resulting in sealing failure. Hydrodynamic seals are widely used in petroleum, chemical, machinery and other industries. However, due to the phenomenon of dripping in the seal gap, zero leakage cannot be achieved. When sealing toxic and harmful liquids, hydrodynamic seals are limited. Contents of the invention [0003] The technical problem to be solved in the present invention is that the existing magnetic liquid sealing device cannot seal high-pressure liquid and the hydrodynamic sealing device cannot achieve zero leakage when sealing high-pressure liquid, so a hydrodynamic magnetic liquid sealing devic...

Claims

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Application Information

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IPC IPC(8): F16J15/16F16J15/43
Inventor 李德才张俊辉
Owner BEIJING JIAOTONG UNIV
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