Magnetic liquid rotating sealing device suitable for space station

Abstract

The invention discloses a magnetic liquid rotating sealing device suitable for a space station, and belongs to the field of mechanical engineering sealing. The magnetic liquid rotating sealing device suitable for the space station solves the problem that the prior magnetic liquid sealing device is not suitable for being used in space stations under the space environment, the complex space temperature environment can lead to changes of physical properties of magnetic liquid, and therefore sealing performance is affected; furthermore, space where the space stations can be installed is limited, the prior sealing devices are too large, and accordingly installing is affected. According to the device, a left pole shoe annular permanent magnet is arranged in a shell; a first bearing is arranged in an inner hole of the annular permanent magnet; a right pole shoe is arranged, and the magnetic liquid is filled into pole teeth of the right pole shoe; a magnetism insulating ring and a second bearing are sequentially arranged, and an end cover is fixed on the shell through a screw; a shaft is arranged in an inner hole formed after assembling of the left pole shoe, the first bearing, the right pole shoe, the magnetism insulating ring and the second bearing. The magnetic liquid rotating sealing device suitable for the space station can ensure that the magnetic liquid in the device operates under a temperature within an optimum temperature range all the time and guarantees sealing performance, and the axial-direction dimension of the device is reduced.

Description

technical field [0001] The invention belongs to the field of mechanical engineering sealing. Background technique [0002] Magnetic liquid is a new type of functional material that combines the response characteristics of magnetic materials to magnetic fields and the fluidity of liquids. Magnetic fluid is widely used in the field of sealing, because of its advantages of zero leakage, no wear, long life and simple structure, it is gradually adopted by more and more industries. The existing magnetic liquid sealing devices are only suitable for the ordinary environment on the ground, and are not suitable for use on the space station in the space environment, because when in the space environment, the temperature is as low as minus 200°C, and as high as 120°C above zero , will lead to changes in the physical properties of the magnetic fluid, thereby affecting the sealing performance. In addition, the installation space of the space station is limited, and the axial dimension o...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing magnetic liquid sealing device is not suitable for use on a space station in a space environment. When in a space environment, the complex temperature environment in space will cause changes in the physical properties of the magnetic liquid, thereby affecting Sealing performance

Images