Copper ring water-cooled magnetic liquid sealing device

Abstract

A copper-ring water-cooling type magnetic liquid sealing device belongs to the field of sealing of mechanical engineering and solves the problem that a conventional magnetic liquid sealing device has a short service life and is degraded in sealing property under the working conditions of large diameter, high rotating speed and high environment temperature. The sealing device comprises magnetic liquid sealing components, copper rings and the like. During cooling of the sealing device, a low-temperature coolant liquid is directly introduced into the copper rings, and the low-temperature copper rings can cool air among gaps to reduce the influence of external high-temperature environment on a magnetic liquid (18); pole teeth of the copper rings are mutually engaged with those at the left ends and the right ends of pole shoes and are fully contacted with those at the left ends and the right ends of the pole shoes with large contact areas, so that the pole shoes can be cooled quickly and efficiently, and accordingly the magnetic liquid (18) is cooled quickly and efficiently; according to the method, to cut grooves in the pole shoes and introduce the coolant liquid into the grooves are not needed, a magnetic loop is not affected, the pressure resistance of the sealing device can be enhanced, and the cooling efficiency is high; in addition, since a permanent magnet (8) is mutually contacted with the coolant liquid and the copper rings, the permanent magnet (8) can also be cooled quickly and efficiently to enhance the sealing property.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, and is especially suitable for magnetic liquid seals under the conditions of high ambient temperature and high rotational speed. Background technique [0002] Magnetic liquid seals are widely used due to their advantages of zero leakage, long life, and low friction. However, in practical applications, under the conditions of large diameter, high speed and high ambient temperature, the magnetic liquid in the sealing gap often fails due to high temperature, and the performance of the permanent magnet will also decline or even fail in a high temperature environment. These Factors seriously affect the service life of the magnetic liquid seal. Internationally, the cooling of magnetic liquid seals under the conditions of large diameter, high speed, and high ambient temperature has always been a difficult problem. Therefore, it is very important to study and improve the cooling of the magne...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that, under the conditions of large diameter, high speed and high ambient temperature, the existing magnetic liquid rotary sealing device may shorten the life of the magnetic liquid seal or even fail due to the large heat generation and high ambient temperature of the sealing gap.

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