Magnetic liquid sealing device with self-cleaning function

A magnetic liquid and sealing device technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of dust and other non-magnetic particles entering, sealing effect and service life decline, so as to increase the service life and improve the sealing effect Effect

Inactive Publication Date: 2010-06-16
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that in the existing magnetic liquid sealing devices, especially in the sealing devices used in harsh environments such as muddy water and wind and sand, it is inevitable that non-magnetic particles such as dust enter the magnetic liquid on the pole teeth, thereby Resulting in reduced sealing effect and service life

Method used

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  • Magnetic liquid sealing device with self-cleaning function

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Embodiment Construction

[0013] The present invention is further described with accompanying drawing as specific embodiment:

[0014] Magnetic liquid sealing device with self-cleaning function, the sealing device includes: housing 2, left bearing 3, first rubber sealing ring 4, left pole shoe 5, permanent magnet 6, second rubber sealing ring 7, right pole shoe 8, Right bearing 10, adjusting gasket 11, flange plate 13, shaft 14,; turn left bearing 3, left pole shoe 5 with rubber sealing ring, permanent magnet 6, right pole shoe 8 with rubber sealing ring, right bearing 10 Install together to form a sealing assembly. After injecting magnetic liquid into the inner ring surface of the permanent magnet 6, place the sealing assembly on the boss in the shell 2, install the adjusting gasket 11 and the flange 13, and screw 12 is threadedly connected with the shell 2, so that the sealing assembly is fixed in the shell 2, and finally the shaft 14 is installed in the direction from left to right.

[0015] Since ...

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Abstract

The invention discloses a magnetic liquid sealing device with a self-cleaning function, which belongs to the technical field of mechanical engineering sealing and comprises a shell (2), a left bearing (3), a left pole shoe (5) with a rubber seal ring, a permanent magnet (6), a right pole shoe (8) with a rubber seal ring, a right bearing (10), an adjusting gasket (11), a flange disk (13) and a shaft (14). The right end face of the right pole shoe and an axle line form an angle alpha of 10 to 80 degrees to change the shape of the right pole shoe and the magnetic field strength, so that the magnetic field strength on the side a of the right pole shoe is higher than that on the side b. According to Bernoullis equation, the pressure of the granules entering a magnetic liquid from outside on the side with high magnetic field strength is higher that on the side with low magnetic field strength, namely the pressure on the side a is more than that on the side b. The system generates a repulsive force to outside foreign materials so as to fulfil the aim of self cleaning.

Description

technical field [0001] The invention belongs to mechanical engineering sealing technology, and is especially suitable for magnetic liquid sealing in harsh environments such as muddy water, wind and sand. Background technique [0002] In the existing magnetic liquid sealing device, the magnetic liquid is usually injected into the gap between the magnet and the pole shoe before installing the seal assembly. After the shaft and the seal assembly on it are sequentially loaded into the housing, the magnet, pole shoe, and shaft will form a magnetic field. Under the action of the magnetic field force, the magnetic liquid flows into the sealing gap between the pole piece and the shaft, and several liquid "O" rings are formed in the sealing gap to realize the sealing effect. However, in actual use, it is inevitable that non-magnetic particles such as dust will enter the magnetic liquid on the pole teeth, thereby affecting the sealing effect and service life. Contents of the inventi...

Claims

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Application Information

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