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A boss type magnetic liquid sealing device

A magnetic liquid and sealing device technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of long magnetic circuit, low safety, large leakage, etc., to enhance the magnetic field, shorten the magnetic circuit, solve the Effects of Radial Size Restricted Problems

Active Publication Date: 2021-02-12
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 the magnetic path of the existing magnetic liquid rotary seal device is too long, and in the case of seal failure, the leakage is large and the safety is not high

Method used

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  • A boss type magnetic liquid sealing device

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Embodiment Construction

[0011] The present invention will be further described with accompanying drawing as specific embodiment:

[0012] A boss type magnetic liquid sealing device such as figure 1 , the device includes: shell (1), bearing (2), left spacer magnetic ring (3), left sealing ring (4), left pole shoe (5), middle spacer magnetic ring (6), horseshoe-shaped annular permanent Magnet (7), middle seal ring (8), middle pole shoe (9), right seal ring (10), right spacer magnetic ring (11), right pole shoe (12), magnetic fluid (13), bushing ( 14), right bearing (15), end cover (16), shaft (17).

[0013] The connection between the various parts constituting the device: the left sealing ring is installed in the groove on the outer surface of the left pole shoe to form a left pole shoe with a sealing ring; the middle sealing ring is installed in the inner pole shoe In the groove of the circular surface, the middle pole shoe with sealing ring is formed; the right sealing ring is installed in the groo...

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Abstract

A boss type magnetic liquid sealing device belongs to the technical field of mechanical engineering sealing. It solves the problem that the existing magnetic liquid rotary seal has a high density and a large centrifugal force under the working condition of high-speed rotation and limited radial size, which leads to insufficient pressure resistance or even failure of the magnetic liquid sealing device. The device is composed of a horseshoe-shaped annular permanent magnet, a pole shoe, and a magnetic isolation ring. The horseshoe-shaped permanent magnet reduces the radial dimension, shortens the magnetic circuit, and enhances the magnetic field in the sealing gap; the boss-shaped middle pole piece effectively utilizes centrifugal force to enhance the sealing performance of the device under high-speed conditions.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering seals, and is especially suitable for high-speed rotary seals with limited axial dimensions. Background technique [0002] Magnetic liquid seals are widely used due to the advantages of zero leakage, long life and low friction. However, in practical applications, due to the long magnetic circuit, large magnetic resistance, and serious magnetic flux leakage, once the magnetic liquid seal fails, the leakage will be large. Ordinary magnetic liquid seals cannot solve the sealing problem of limited radial size under high-speed working conditions. Contents of the invention [0003] The technical problem to be solved by the present invention is that the magnetic path of the existing magnetic liquid rotary sealing device is too long, and when the seal fails, the leakage is large and the safety is not high. In the working condition of high-speed rotating seal and limited radial size, ord...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/43F16J15/16
CPCF16J15/16F16J15/43
Inventor 李德才武杰牛思放喻峻陈铎
Owner BEIJING JIAOTONG UNIV
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