Clean vacuum system for engine plume test study and vacuum pumping repressing method thereof
A vacuum system and engine technology, which is used in engine testing, aerodynamic testing, machine/structural component testing, etc. to ensure cleanliness and full-scale high precision.
Inactive Publication Date: 2012-02-22
BEIHANG UNIV
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[0005] Aiming at the problems existing in the prior art, the present invention provides a new type of clean vacuum system specially used for engine plume test research, a clean vacuum system for engine plume test research and its vacuuming and repressurization method. The vacuum system can obtain various vacuum degrees required by the plume test according to the flow rate of the engine. The system is clean and pollution-free, the pumping speed of the system is adjustable, and the system has various working modes. The flow rate of the supply system can be automatically adjusted, and the pre-pumping, pre-cooling and regeneration of the cryopump are convenient and fast. The solution to the above technical problems increases the cleanliness, reliability, practicability and economy of the operation of the vacuum plume effect test system
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[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0040] A kind of clean vacuum system that is used for engine plume test research of the present invention, as figure 1 As shown, it includes a low vacuum system 100, a low vacuum liquid nitrogen cold trap system 200, a high vacuum system 300, a high vacuum liquid nitrogen cold trap system 400, a cryopump liquid nitrogen supply system 500, an air recompression system 700, and a nitrogen recompression system 800, container vacuum measurement system 900, residual gas analysis system 1000, liquid helium heat sink 2000, liquid nitrogen heat sink 3000, plume adsorption pump 4000.
[0041] The low vacuum system 100 is a Roots pump unit, which includes a screw pump 101, a butterfly valve A103, a resistance gauge A105, a solenoid valve A107, a Roots pump 109, a butterfly valve C111 and a gate valve A113. The screw pump 101 is connected to the inlet of the liquid nitr...
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The invention provides a clean vacuum system for engine plume test study and a vacuum pumping repressing method thereof, which belong to the technical field of engine vacuum science. The clean vacuum system comprises a low vacuum system, a low vacuum liquid nitrogen cold trap system, a high vacuum system, a high vacuum liquid nitrogen cold trap system, a low temperature pump liquid nitrogen supply system, an air repressing system, a nitrogen gas repressing system, a container vacuum measuring system, a residue gas analysis system and a liquid helium hot sinking liquid nitrogen hot sinking andplume absorption pump. The vacuum obtaining is mainly completed through the clean low vacuum system, the high vacuum system and the liquid helium hot sinking liquid nitrogen hot sinking and plume absorption pump, which are used for obtaining various clean vacuum degrees required by the plume test, the highest ultra-high dynamic vacuum degree capable of being obtained is 10 to 6Pa, wherein the lowvacuum system and the high vacuum system are respectively provided with the liquid nitrogen cold trap system and are used for absorbing oil steam generated when a mechanical pump works, and the cleanness of a vacuum container is ensured.
Description
technical field [0001] The invention belongs to the field of engine vacuum science and technology. The invention relates to a vacuum system design for a vacuum container, in particular to a clean vacuum system and a vacuuming and repressing method for engine plume test research. Background technique [0002] An important prerequisite for the study of the plume effect is to ensure the rapid adsorption of the plume gas, so that the environmental vacuum can reach the specified index. [0003] At present, there is no vacuum environment simulation equipment specially used for engine plume test research in China. Space environment simulation equipment such as KM4 and KM6 are mainly used for research on static or low-velocity gas satellites and other thermal vacuum experiments. Good pumping speed, while the engine plume test is mainly used to study the characteristics of the dynamic high-temperature, high-speed plume gas flow field distribution, pollution measurement, etc., so KM4,...
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IPC IPC(8): G01M9/06G01M15/02
Inventor 蔡国飙凌桂龙王文龙李晓娟黄本诚张国舟
Owner BEIHANG UNIV