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Magnetic fluid sealing device

A magnetic fluid sealing and magnetic fluid technology, which is applied to the components of pumping devices for elastic fluids, liquid fuel engines, non-variable-capacity pumps, etc., can solve the problem of magnetic fluid leakage, inconvenience, difficult installation and maintenance, etc. question

Inactive Publication Date: 2012-02-08
龚祺允
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, affected by the centrifugal force of the rotating shaft, the conveying medium in the pump tends to infiltrate into the sealed chamber through the gap between the rotating shaft and the pole piece, and the magnetic fluid in the sealed chamber may also leak out through the gap between the rotating shaft and the pole piece.
In addition, conventional ferrofluid sealing devices still have the problems of difficult installation and maintenance

Method used

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  • Magnetic fluid sealing device
  • Magnetic fluid sealing device
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Examples

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Embodiment Construction

[0043] The structural design of the present invention will be further described with reference to the accompanying drawings by way of examples but not limiting embodiments:

[0044] see Figures 1 to 6 , shows a magnetic fluid sealing device 10 formed according to an embodiment of the present invention, the sealing device 10 is installed in a sealing cover 11, the sealing cover 11 is combined on the pump casing 12 and is sleeved around the rotating shaft 14 in the pump casing 12, so that the rotating shaft There is a liquid seal between 14 and the pump casing 12 (see image 3 ). In this embodiment, the sealing cover 11 includes an inner end surface 20 and an outer end surface 22 separated along an axis, and the inner end surface 20 of the sealing cover 11 is coupled to an end 24 of the pump housing 12 by a screw 23 . The sealing cover 11 further includes a shaft hole 26 passing through the outer end surface 22 from the inner end surface 20 along the axis. The shaft hole 26 a...

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Abstract

The invention relates to a magnetic fluid sealing device. The device comprises an outer ring, a magnetic field generation unit and a sealing ring, wherein a rotating shaft can pass through the outer ring; a sealing chamber is formed in the outer ring; the magnetic field generation unit is arranged in the sealing chamber of the outer ring and encircles the rotating shaft; a gap is formed between the magnetic field generation unit and the rotating shaft and used for filling magnetic fluid; the magnetic field generation unit can generate a magnetic field with magnetic force to keep the magnetic fluid in the gap; the sealing ring is arranged in the sealing chamber of the outer ring and contained in radially separated outer periphery and inner periphery; the rotating shaft can pass through theinner periphery of the sealing ring; an arc lip part extends from the end of the inner periphery of the sealing ring, which faces the outer ring; and the lip part can prevent a conveying medium or cooling liquid outside the sealing chamber from penetrating the sealing chamber.

Description

technical field [0001] The invention relates to a shaft seal, in particular to a shaft seal structure formed by magnetic fluid. Background technique [0002] It is known to install mechanical seals and / or ferrofluidic seals in pumps to form a seal between the pump casing and the pump shaft. The magnetic fluid seal generally includes a plurality of ring magnets installed in a sealed chamber and sleeved on the rotating shaft. Each magnet is sandwiched between two pole pieces and sleeved on a rotating shaft. The rotating shaft and the pole pieces are made of magnetically conductive materials. As a result, a gap is formed between the outer periphery of the rotating shaft and the inner periphery of the pole piece, and the magnetic fluid is injected into the sealed chamber, and the magnetic fluid fills the gap. The magnetic field lines from the magnet through the pole piece, the rotating shaft and the magnetic fluid form a closed magnetic flux circuit with magnetic force, which k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/08
Inventor 龚祺允
Owner 龚祺允
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