Liquid helium conveying system used for large-size multi-section liquid helium heat sinks and class converting method for large-size multi-section liquid helium heat sinks

Abstract

The invention provides a liquid helium conveying system used for large-size multi-section liquid helium heat sinks and a class converting method for converting liquid nitrogen to liquid helium of the liquid helium heat sinks on the basis of the liquid helium conveying system. The liquid helium conveying system and the method are applied to an engine vacuum plume experimental study. The liquid helium conveying system comprises a heat sink system, a liquid nitrogen supplying system, a liquid helium supplying system, a nitrogen supplying system and a helium supplying system. The heat sink system comprises five large-size liquid helium heat sinks and four liquid nitrogen heat sinks. The liquid nitrogen supplying system is provided with conveying pipelines for the liquid helium heat sinks and the liquid nitrogen heat sinks, and provided with a liquid nitrogen cooling box and a liquid helium cooling box, wherein the liquid nitrogen cooling box and the liquid helium cooling box are used for centrally containing and managing liquid nitrogen adjusting valves and liquid helium adjusting valves. According to the liquid helium conveying system used for the large-size multi-section liquid helium heat sinks and the class converting method for the large-size multi-section liquid helium heat sinks, liquid helium refrigeration can be provided for the large-size multi-section liquid helium heat sinks at the same time, unified liquid supplying is achieved for all the heat sinks, operation is convenient, cost is saved, floor space is small, the valves can be centrally controlled conveniently, working efficiency is improved, and operation and maintenance are convenient.

Description

technical field [0001] The invention belongs to the field of vacuum science and technology. The invention relates to a liquid helium delivery system for a large-scale multi-section liquid helium heat sink and a method for converting a liquid helium heat sink from liquid nitrogen to liquid helium, which is applied to engine vacuum plumes In experimental research. Background technique [0002] The vacuum plume effect test system is mainly used for aerospace attitude and orbit control engine plume test research. It can simulate the vacuum plume effect of electric propulsion engines or chemical propulsion engines. In order to effectively simulate the work of engines in vacuum cryogenic environments During the engine plume test, the requirements for the vacuum in the cabin are very strict, such as extremely low background ambient temperature (below minus 260 degrees), and ultra-high ambient vacuum (1.0E-6Pa). In order to meet the above-mentioned vacuum cryogenic test requirement...

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Problems solved by technology

[0005] In order to solve the above problems, the present invention proposes a liquid helium delivery system and a transfer method for a large-scale multi-section liquid helium heat sink, which solves the need for environmental vacuum during the engine plume test

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