Magnetic powder liquid sealing device with fluid dynamic pressure back conveying function

A magnetic fluid sealing, magnetic source technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve problems such as loss and leakage, and achieve the effect of avoiding partial loss and zero leakage

Pending Publication Date: 2021-12-24
BEIJING JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device can solve the problem that a small amount of leakage occurs due to the presence of pores in the sealing gap of the magnetic powder in the existing magnetic powder sealing device, and the problem of partial loss due to the erosion of the magnetic powder by the sealing liquid under pressure

Method used

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  • Magnetic powder liquid sealing device with fluid dynamic pressure back conveying function
  • Magnetic powder liquid sealing device with fluid dynamic pressure back conveying function

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Embodiment Construction

[0018] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0019] Such as figure 1 As shown, a magnetic powder sealed liquid device with hydrodynamic pressure reverse input includes a main shaft 1, a left sleeve retaining ring 2, a casing 3, an end face sealing O-ring 4, a left pole shoe 5, and a left pole shoe O-ring 6 , Spiral groove bushing 7, right pole shoe O-ring 8, right pole shoe 9, magnetic isolation ring 10, left bearing 11, right bearing 12, thread seal end cover 13, right bearing elastic retaining ring 14, left bearing elastic stop Circle 15, axle sleeve right retaining ring 16, magnetic source permanent magnet 17.

[0020] In this embodiment, the installation and working methods of the magnetic fluid sealing device for filtering magnet...

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Abstract

The invention provides a magnetic powder liquid sealing device with a fluid dynamic pressure back conveying function. The magnetic powder sealing liquid device comprises a main shaft, a shaft sleeve left check ring, an outer sleeve, an end face sealing O-shaped ring, a left pole shoe, a pole shoe O-shaped ring, a spiral groove shaft sleeve, a right pole shoe, a magnetism isolating ring, a left bearing, a right bearing, a threaded sealing cover, a bearing elastic check ring, a shaft sleeve right check ring and a magnetic source permanent magnet. The inclined surfaces of trapezoidal teeth on the pole shoes are opposite to spiral teeth on the shaft sleeve in rotating direction, so that magnetic powder pores can be filled with sealed liquid, meanwhile, the liquid pressure in the gaps can be increased when the magnetic powder is subjected to magnetic field force, and zero leakage of the sealed liquid is realized. By means of the magnetic powder sealing device, the problems that in an existing magnetic powder sealing device, magnetic powder in the sealing gaps has pores, so that little leakage occurs, under-pressure sealed liquid washes the magnetic powder, partial loss occurs are solved, the magnetic powder pores can be filled with the liquid to increase the liquid pressure in the gaps, and a magnetic powder sealing technology is applied to the fields of ships, petroleum, chemical engineering and the like needing to seal the liquid environment.

Description

technical field [0001] The invention relates to the field of mechanical engineering sealing, in particular to a magnetic powder sealing liquid device with fluid dynamic pressure reverse input. Background technique [0002] Magnetic powder is a powder composed of nanoparticles wrapped by surfactants, which exhibits superparamagnetism under a magnetic field. Sealing devices using magnetic powder have high pressure resistance. Because the magnetic powder in the sealing gap has pores under the action of the magnetic field, there will be a small amount of leakage in the existing magnetic powder sealing device, and zero leakage of the sealed substance cannot be achieved. The magnetic powder seal is applied in a sealed liquid environment. When the pressure of the sealed liquid is greater than the pressure of the outlet side, the magnetic powder in the sealing gap will be washed by the liquid and partially lost. The purpose of the present invention is to provide a magnetic powder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43
CPCF16J15/43
Inventor 王德义李德才何新智
Owner BEIJING JIAOTONG UNIV
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