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超低温气动阀门驱动机构及其防卡滞技术.pdf 12页

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Mechanical Engineering and Technology 机械工程与技术, 2019, 8(4), 303-313 Published Online August 2019 in Hans. /journal/met /10.12677/met.2019.84037 Driving Mechanism of Ultra-Low Temperature Pneumatic Valve and Anti-Sticking Technology 1 1 1 2 2 2 Wei Zhou , Yeru Xu , Ying Zhao , Zhe Deng , Yankun Wang , Hai Jin 1 Beijing Aerospace Propulsion Institute, Beijing 2 Capital Aerospace Machinery Co., Ltd., Beijing st th rd Received: August 1 , 2019; accepted: August 16 , 2019; published: August 23 , 2019 Abstract The design of driving mechanism and its anti-sticking technology is a key design technology for valves of cryogenic liquid hydrogen and liquid oxygen engines. Improving the design level of the driving mechanism, preventing valve sticking and improving the reliability of the driving me- chanism motion are an important part of the ultra-low temperature pneumatic valve design, espe- cially in ultra-low temperature environment, driving mechanism is more prone to stuck dead fault. Such failures often occur after several actions, not easily discovered. So it’s like a “time bomb”, it often becomes the greatest threat to valve reliability design. This paper mainly introduces the de- sign technology of valve driving mechanism for hydrogen-oxygen engine in China. The an- ti-sticking technology and its improvement effect of typical faults in a hydrogen-oxygen engine are discussed in detail. This paper can be used as a reference for cryogenic valve designers in design and development. Keywords Ultra Low Temperature, Drive Mechanism, Anti Blocking 超低温气动阀门

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