Boss type magnetic liquid sealing device

A magnetic liquid and sealing device technology, which is applied to the sealing of engines, engine components, mechanical equipment, etc., can solve the problems of too long magnetic path, large leakage, and low safety, so as to enhance the magnetic field, shorten the magnetic path, and solve the problem of Effects on size-constrained problems

Active Publication Date: 2020-02-04
BEIJING JIAOTONG UNIV
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  • Abstract
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  • 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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  • 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

The invention provides a boss type magnetic liquid sealing device, and belongs to the technical field of mechanical engineering sealing. The problems that when an existing magnetic liquid rotary sealis under the working condition of high-speed rotation and the limited radial size, magnetic liquid is large in density and centrifugal force, so that the magnetic liquid rotary sealing device is insufficient in pressure resisting capacity or even fails are solved. The device is composed of a horseshoe type annular permanent magnet, pole shoes, flux insulation rings and the like. The radial size ofthe horseshoe type permanent magnet is reduced, a magnetic loop is shortened, and magnetic fields in sealing clearances are enhanced; and by means of the boss type middle pole shoe, the centrifugal force is effectively utilized, and the sealing performance of the device under the high-speed working condition is enhanced.

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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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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