Magnetic fluid sealing shaft with heat insulation device

A magnetic fluid sealing and heat insulation device technology, which is applied to the sealing of the engine, the protection of the pipeline through heat insulation, the cooling of the bearing, etc., can solve the problems of magnetic fluid and permanent magnet demagnetization when heated, and achieve increased thermal conductivity and good heat dissipation Effect

Active Publication Date: 2019-08-06
BEIJING INST OF SPACECRAFT SYST ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the ferrofluid seal shaft in the existing thermal vacuum experiment is easy to cause the demagnetization of the ferrofluid and the permanent magnet when heated, and proposes a ferrofluid seal shaft with a heat insulation device

Method used

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  • Magnetic fluid sealing shaft with heat insulation device

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] Such as figure 1 As shown, a ferrofluid sealed shaft with a heat insulation device includes a transmission shaft 10, a non-magnetic sleeve, a heat insulating gasket 18, a left bearing, a right bearing 17, a magnetic assembly and an end cover 9, and the left bearing and the magnetic assembly are sequentially set on the transmission shaft 10 from left to right, the right bearing 17 is set on the right side of the magnetic assembly, and there is a certain distance between the magnetic assembly and the left bearing, and the non-magnetic conductive sleeve is set On the left bearing, the magnetic assembly and the right bearing 17, the left end of the non-magnetic sleeve is externally connected to the thermal vacuum tank, the non-magnetic sleeve and the thermal vacuum tank are fixedly connected, and the right end of the non-magnetic sleeve is installed with an end cap 9, T...

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Abstract

The invention discloses a magnetic fluid sealing shaft with a heat insulation device. The magnetic fluid sealing shaft comprises a transmission shaft, a non-magnetic sleeve, a heat insulation gasket,a left bearing, a right bearing, a magnetic component and an end cover, the left bearing and the magnetic component are sequentially sleeved on the transmission shaft from left to right, the right bearing is arranged on the right side of the magnetic component in a sleeved mode, the magnetic component and the left bearing are spaced by a certain distance, and the non-magnetic sleeve sleeves the left bearing, the magnetic component and the right bearing. According to the magnetic fluid sealing shaft, the magnetic component plays a dynamic sealing role, so that sealing between the transmission shaft and the non-magnetic sleeve can be realized, the transmission shaft is composed of a three-level stepped shaft formed by integrally forming, a first step shaft is used for isolating the heat transmitted by a heat vacuum tank through the transmission shaft, meanwhile, a magnetic conduction material shaft sleeve, a permanent magnet, magnetic poles form a magnetic conduction loop; a magnetic field is generated between the magnetic conduction material shaft sleeve and the magnetic poles, and a liquid magnetic fluid is restrained.

Description

technical field [0001] The invention relates to a thermal vacuum test device, in particular to a sealing device for a shaft passing through a box under a thermal vacuum test, more specifically, a magnetic fluid sealing shaft with a thermal insulation device. Background technique [0002] Thermal vacuum test refers to the test to test the performance parameters of the tested part under the specified vacuum degree and temperature conditions. The thermal vacuum test first needs a device to simulate the vacuum and temperature environment in space, secondly needs a device to drive and load the tested part, and finally needs a device for data acquisition of output torque, rotational speed and rotation angle. [0003] When conducting thermal vacuum tests, sensors, etc. cannot work in vacuum, high and low temperature environments. Therefore, the sensors, drivers, etc. are generally placed outside the vacuum tank, and the torque, speed, etc. are drawn out through the box-through sha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/43F16C35/06F16C37/00F16L59/02
CPCF16C35/06F16C37/007F16J15/162F16J15/43F16L59/02
Inventor 郭芳李伟杰马为佳齐哲张堪高晓明
Owner BEIJING INST OF SPACECRAFT SYST ENG
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