Liquid helium heat sink support structure for reducing experimental cost

A technology of supporting structure and heat sink, which is applied in the testing of machine/structural components, engine testing, measuring devices, etc., can solve the problems such as the increase of additional test cost and the increase of liquid helium consumption, to increase the effective test space, The effect of less liquid consumption and reduction of the amount of liquid helium

Inactive Publication Date: 2009-12-02
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for liquid helium with low latent heat of vaporization and expensive price, the consumption of liquid helium caused by heat conduction and radiation of this support structure increases sharply, and the cost of additional tests increases sharply

Method used

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  • Liquid helium heat sink support structure for reducing experimental cost
  • Liquid helium heat sink support structure for reducing experimental cost
  • Liquid helium heat sink support structure for reducing experimental cost

Examples

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings.

[0012] 1. Analysis of pre-cooling process of liquid helium heat sink

[0013] In order to reduce the consumption of liquid helium, during pre-cooling, first fill liquid nitrogen into the liquid helium heat sink pipeline to fully pre-cool the liquid helium heat sink to 100K, and then use liquid helium to continue to pre-cool the liquid helium heat sink until the liquid helium heat sink When the temperature of the helium heat sink reaches about 10K, the test is started.

[0014] During the pre-cooling process, the total liquid helium consumption formula is as follows:

[0015] V He =V He1 +V He2

[0016] V He 1 = Q ( h 2 - h ...

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Abstract

The invention relates to a liquid helium heat sink support structure used for spatial environment simulation equipment, which consists of a liquid nitrogen heat sink and a framework thereof, a liquid helium heat sink, and a polyfluortetraethylene pad, wherein the liquid helium heat sink is directly arranged on the liquid nitrogen heat sink through the polyfluortetraethylene pad. The structure can make the heat sink reduce a set of framework so as to increase the effective experimental space in a vacuum container, reduce the outgassing rate of a material in the vacuum container, and improve the static vacuum degree in the vacuum container; and the required material is reduced, and the liquid helium required to be consumed for precooling the liquid helium heat sink is also reduced, so that the experimental cost is reduced.

Description

【Technical field】 [0001] The invention relates to a liquid helium heat sink support structure with reduced test cost. The invention is particularly applicable to a support structure of a liquid helium heat sink which reduces the consumption of liquid helium. 【Background technique】 [0002] The heat sink is an important part of the space environment simulation equipment, and its function is to simulate the cold and dark environment of the space on the ground. At present, most of the thermal vacuum environment simulation test equipment at home and abroad use liquid nitrogen heat sink to simulate the cold and dark environment of space, but for systems that require large air release and high pumping speed, the vacuum that can be simulated is not high, and can only simulate 100km The following environmental pressures. With the rapid development of China's aerospace industry, the need for large-scale manned spaceflight, and the demand for rocket engine plume tests, the use of li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/02
Inventor 蔡国飙凌桂龙王文龙李晓娟黄本诚张国舟
Owner BEIHANG UNIV
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