Magnetic liquid sealing device using magnetic grease

A technology of magnetic liquid and magnetic grease, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., and can solve problems such as short life

Inactive Publication Date: 2014-07-16
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing magnetic liquid rotary sealing device can only seal the liquid medium in the environment of low pressure and low linear velocity, and has a short service life in the environment of high pressure and high linear velocity, and has a large application range. Limitations, especially when sealing acidic and alkaline liquids in aerospace

Method used

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  • Magnetic liquid sealing device using magnetic grease

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Embodiment Construction

[0019] The present invention will be further described with accompanying drawing as specific embodiment:

[0020] Magnetic liquid seals with magnetic grease added, such as figure 1 , the sealing device includes: a housing 1, a left pole piece 2, a permanent magnet 3, a right pole piece 4, an end cover 5, a screw 6, a right sealing ring 7, and a left sealing ring 8.

[0021] Connections between the parts making up the device:

[0022] The left sealing ring 8 is installed in the groove on the outer circle of the left pole shoe 2 to form a left pole shoe with a sealing ring, and the right sealing ring 7 is installed in the groove on the outer circle of the right pole shoe 4 to form a belt right pole shoe of the sealing ring;

[0023] The permanent magnet 3 is installed on the right end face of the left pole shoe with sealing ring, the right pole shoe with sealing ring is installed on the right end face of the permanent magnet 3, the left end face of the permanent magnet 3 and t...

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Abstract

The invention provides a magnetic liquid sealing device using magnetic grease and belongs to the field of mechanical engineering sealing. The magnetic liquid sealing device solves the problem of liquid leakage when an existing magnetic liquid sealing device is used for sealing liquid in a high-pressure and high-liner-speed environment. The magnetic liquid sealing device comprises a shell (1), a left pole shoe (2), a permanent magnet (3), a right pole shoe (4), an end cover (5), screws (6), a right sealing ring (7), a left sealing ring (8) and other parts. According to the magnetic liquid sealing device, magnetic liquid is injected into the space between pole teeth b and a rotary shaft, and the magnetic grease is injected into the space between pole teeth a and the rotary shaft; because the magnetic grease has the advantages of being large in viscosity and not prone to being mixed with sealed media, the problem of the liquid leakage when the liquid is sealed in the high-pressure and high-liner-speed environment.

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. The typical structure of the existing magnetic liquid rotary sealing device is as described in the patent applications with the publication number of CN102518811A and the publication number of CN202091519U. It can only seal the liquid medium under the environment of low pressure and low linear velocity, and its life expectancy is high under the environment of high pressure and high linear velocity. Short, the scope of application is relatively limited, especially when sealing acid-base liquids in the aerospace field. Contents of the invention [0003] The technical problem to be solved by the present invention is that the existing magnetic liquid rotary sealing device can only seal the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43
Inventor 李德才姚杰
Owner BEIJING JIAOTONG UNIV
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