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Magnetic liquid sealing device for sealing liquid

A magnetic liquid and sealing liquid technology, which is applied to the sealing of engines, engine components, mechanical equipment, etc., can solve the problems of magnetic liquid seals, high-pressure liquids and mechanical seals that cannot achieve zero leakage, and achieve high binding force , The sealing gap is small, the effect of improving the pressure resistance

Inactive Publication Date: 2014-04-30
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is that the existing magnetic liquid seal cannot seal high-pressure liquid and the mechanical seal device cannot achieve zero leakage when sealing liquid, so a magnetic liquid seal device for sealing liquid is proposed

Method used

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  • Magnetic liquid sealing device for sealing liquid
  • Magnetic liquid sealing device for sealing liquid
  • Magnetic liquid sealing device for sealing liquid

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Experimental program
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Embodiment Construction

[0026] to attach Figures 1 to 6 The present invention will be further described for the specific embodiment:

[0027] A magnetic liquid seal for sealing liquids such as figure 1 , 2 As shown, the device consists of:

[0028] Spring seat 1, set screw 2, rotating shaft 3, spring 4, moving ring 5, moving ring auxiliary sealing ring 6, first magnetic isolation ring 7, first pole shoe auxiliary sealing ring 8, first pole shoe 9, annular permanent Magnet 10, non-magnetic screw 11, second pole shoe 12, second pole shoe auxiliary sealing ring 13, second magnetic isolation ring 14, static ring 15, static ring auxiliary sealing ring 16, anti-rotation pin 17, threaded end cap 18. Shell 19.

[0029] Connections between the parts of the device:

[0030] Put the ring-shaped permanent magnet 10 into the inner circle of the first pole piece 9, and install it on the inner circle stepped end face of the first pole piece 9; the second pole piece 12 is put into the inner circle of the ring-...

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Abstract

The invention discloses a magnetic liquid sealing device for sealing liquid, and belongs to the field of mechanical engineering sealing. The magnetic liquid sealing device comprises a spring seat (1), a set screw (2), a rotary shaft (3), a spring (4), a movable ring (5), an auxiliary sealing ring (6) of the movable ring, a first non-magnetic ring (7), an auxiliary sealing ring (8) of a first pole shoe, the first pole shoe (9), an annular permanent magnet (10), a non-magnetic-permeability screw (11), a second pole shoe (12), an auxiliary sealing ring (13) of the second pole shoe, a second non-magnetic ring (14), a static ring (15), an auxiliary sealing ring (16) of the static ring, an anti-rotating pin (17), a threaded end cover (18) and a shell (19). The magnetic liquid sealing device is arranged on an end surface, relative speeds of two types of liquid on a contact surface of the sealed liquid and the magnetic liquid are nearly zero, shearing movement between the magnetic liquid and the sealed liquid can be prevented, and accordingly the sealing life can be prolonged advantageously.

Description

technical field [0001] The invention belongs to the field of mechanical engineering sealing. Background technique [0002] At present, magnetic liquid sealing technology is only suitable for static sealing when sealing liquids. When the dynamic seal uses a magnetic liquid to seal the liquid, due to the relatively high relative velocity between the magnetic liquid and the sealed liquid at the seal, the interface is prone to instability at the seal interface, resulting in seal failure. The existing magnetic liquid seal is affected by the processing accuracy and the runout of the rotating shaft. The radial gap at the seal is usually greater than 0.1mm, so that the binding force of the magnetic field on the magnetic liquid is relatively small, and the seal life is low. However, when the mechanical seal seals liquid under normal working conditions, leakage will also occur at the seal gap, so zero leakage cannot be achieved in practical applications, which limits the use of seali...

Claims

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Application Information

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IPC IPC(8): F16J15/53F16J15/16
Inventor 李德才邢延思
Owner BEIJING JIAOTONG UNIV
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