High-altitude low-temperature environment simulation device before attitude control engine ignition test

Abstract

The invention relates to a high-altitude low-temperature environment simulation device before attitude control engine ignition test, and solves the problems that the existing high-altitude low-temperature environment of the engine cannot meet the requirements of the engine test for temperature control precision, the temperature distribution is uneven, and the propellant is easy to freeze. The device comprises a propellant heating system, a low temperature refrigeration system, a nitrogen replacement system, a vacuum system and an engine nozzle fixing component, wherein the propellant heating system comprises a heating cable and a heat insulating material, the heating cable is wrapped around the propellant supply line, the heat insulating material is covered on the propellant supply line after the heating cable is wrapped; the low temperature refrigeration system comprises a liquid nitrogen supply unit, a liquid nitrogen discharge unit and a low temperature environment chamber; the lowtemperature environment chamber is internally provided with a plurality of sets of cooling ring tubes, and the liquid nitrogen supply unit and the liquid nitrogen discharge unit are respectively connected to the cooling ring tubes; the nitrogen replacement system comprises a nitrogen inlet pipe and a nitrogen outlet pipe which are both connected to the low temperature environment chamber; and thevacuum system is used to vacuumize the inlet pipe of the engine.

Description

technical field [0001] The invention relates to the field of aerospace engine tests, in particular to a high-altitude low-temperature environment simulation device before an attitude control engine ignition test. Background technique [0002] With the further development of weapon model development, the performance requirements of the attitude control engine during use are further improved. In addition to the basic engine performance tests, various mechanical performance tests and environmental tests are required in the engine development process. According to the high-altitude and low-temperature environmental conditions in which the engine is in use, more proposals are made for the high-altitude and low-temperature environment simulation tests during engine development. It also puts forward more stringent requirements for the ability of high-altitude and low-temperature environment simulation tests. At present, during the development process of many attitude control engin...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems that the existing high-altitude and low-temperature environment of the engine cannot meet the temperature control accuracy requirements of the engine test, the preparation pe

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