Novel method for increasing high linear speed and prolonging sealing life of static magnetic liquid

Abstract

The invention provides a novel method for increasing high linear speed and prolonging the sealing life of static magnetic liquid, and belongs to the field of mechanical engineering sealing. The method solves the problem that the calorific value of magnetic liquid in a sealing gap of an existing magnetic liquid rotary sealing device is too high and accordingly service life is lowered, and solves the problem that in the static sealing process, a magnetic liquid agglomeration phenomenon occurs due to the action of a long-time stable strong magnetic field, and accordingly sealing performance is reduced. According to the method, outer cylindrical faces of N cylindrical permanent magnets (3) are sleeved with N iron core rings (9), and electromagnetic coils are wound around the outer cylindrical faces of the N cylindrical permanent magnets provided with the iron core rings. The electromagnetic coils are connected with an external power supply to generate an electromagnetic field; by changing the direction and the size of current and changing the magnetic field intensity applied to the magnetic liquid, problems existing when the magnetic liquid is used in rotation sealing of the high linear speed and static sealing can be solved; the iron core structure can increase the intensity of the electromagnetic field, improves the magnetism gathering effect and further prolongs the service life of the magnetic liquid.

Description

technical field [0001] The invention relates to a new method for improving the sealing life of high line speed and static magnetic liquid, which belongs to the field of mechanical engineering sealing. Background technique [0002] The magnetic liquid seal has the advantages of zero leakage, long life, high reliability, etc., so it has been widely used in the sealing field. With the rapid development of aviation, military industry, energy, electric power and other industries, higher and higher requirements are put forward for sealing. For example, the sealing requirements of aviation generators, power plant steam turbines, etc. are required to achieve zero leakage, which cannot be met by other seals except magnetic liquid seals. However, these sealing fields often encounter high-speed rotating sealing environments, or require sealing in static sealing environments. A very long-lived problem. Typical structures of existing magnetic liquid sealing devices are described in pat...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is that when the existing magnetic liquid sealing device is used for high linear velocity rotary sealing, there are problems of poor sealing performance and reduced sealing life caused by excessive heat generation of the magnetic liquid; When sealing, there is a problem that the sealing life is reduced due to the agglomeration of the magnetic liquid under a stable and strong magnetic field for a long time

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