Liquid nitrogen temperature zone vibration test device of low temperature pressure accumulator for carrier rocket

2013 
A liquid nitrogen temperature zone vibration test device of a low temperature pressure accumulator for carrier rocket includes a supply air pressurization system, an air cushion pressure control system, and a vibration environment system. The vibration environment system comprises a vibration table and a vibration tooling; the low pressure accumulator is installed on the vibration table through the vibration tooling; at a beginning of a test, a liquid nitrogen is poured into a shell of the low temperature pressure accumulator; the supply air pressurization system injects helium into a diaphragm capsule of the low temperature pressure accumulator, so that a pressure in the diaphragm capsule is consistent with an actual working pressure of the diaphragm capsule; the air cushion pressure control system is internally provided with a gas cylinder; the gas cylinder is communicated with an inner cavity of the shell of the low temperature pressure accumulator; the supply air pressurization system fills the gas cylinder with the nitrogen, and fills the shell of the low temperature pressure accumulator with a gas-liquid mixed lower temperature nitrogen, so that the pressure in the gas cylinder is consistent with the pressure in the shell of the low temperature pressure accumulator; and in a vibration test, the air cushion pressure control system controls to maintains pressure stability in the shell of the low temperature pressure accumulator.
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