摘要
为解决液体火箭增压输送系统气体减压阀在生产和飞行试验中出现的出口压力长时间持续下降问题,基于实测摩擦力提出了O形圈黏弹摩擦特性对减压阀出口压力的影响机理。使用修正摩擦力后的减压阀仿真模型复现了该减压阀出口压力长时间持续下降现象,并提出改进方案。样机验证试验表明,改进后减压阀出口压力长时间下降现象明显改善,减压阀精度提高约30%,验证了改进方案的有效性和O形圈黏弹摩擦特性对减压阀出口压力影响机理的正确性。
The effects of rubber O-rings viscous friction characteristics on pneumatic reducing valve pressure performance were put forward based on experiment measured friction to solve the valve outlet pressure long-term decreasing problem during production and flight testing,which pneumatic reducing valve that was used in liquid rocket pressurization system.Based on the valve simulation model using the modified friction force,the outlet pressure long-term decreasing phenomenon was repeated and improved scheme was proposed.The prototype experiments show that,the valve outlet pressure long-term decreasing phenomenon was obviously improved and the valve accuracy was increased by about 30%.Finally,the effectiveness of the improved schemes and the theory correctness of the effects of rubber O-rings viscous friction characteristics on pneumatic reducing valve outlet pressure performance were validated.
作者
张明
臧辉
郭志海
杨丽曼
石玉鹏
ZHANG Ming;ZANG Hui;GUO Zhi-hai;YANG Li-man;SHI Yu-peng(Aerospace System Engineering Shanghai,Shanghai 201109;School of Automation Science and Electric Engineering,Beihang University,Beijing 100191)
出处
《液压与气动》
北大核心
2022年第12期168-176,共9页
Chinese Hydraulics & Pneumatics
关键词
减压阀
压力性能
O形圈
黏弹特性
摩擦力
reducing valve
pressure performance
O-rings
viscous characteristics
friction
作者简介
张明(1986-),男,湖北汉川人,硕士,主要从事火箭增压输送系统阀门设计与仿真工作。
