Pole shoe back-trough circulating cooling magnetic liquid sealing device

Abstract

The utility model relates to a pole piece back groove type circulating cooling magnetic liquid sealing device, which belongs to the field of mechanical engineering sealing. The problems of short service life and reduced sealing performance of the existing magnetic liquid sealing device under the conditions of large diameter, high rotational speed and high ambient temperature are solved. In the device, the outer surface of the pole shoe is provided with back grooves for circulating cooling liquid, which are alternately arranged with the back teeth, which can increase the contact area between the pole shoe and the cooling liquid and improve the cooling efficiency; the back teeth are opposite to the pole teeth, and the back grooves and The tooth slots are opposite to each other, which does not affect the formation of the magnetic circuit and ensures the pressure resistance of the sealing device; the radial distance d between the back slot and the tooth slot is 0.5-1mm, and the cooling efficiency is high; It is opposite to the back slot on the pole piece; the round holes are distributed diagonally in the rectangular slot on the surface of the magnetic guide sleeve, and the number is equal to the number of the back slot on the pole piece. This design does not affect the formation of the magnetic circuit, and can ensure that every There is fluid coolant in each pole shoe back groove, and the cooling efficiency is high.

Description

technical field [0001] The invention belongs to the field of mechanical engineering seals, and is especially suitable for magnetic liquid seals under high ambient temperature and high rotational speed working conditions. 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, the research on the cooling of the magnetic liquid seal is very i...

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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