摘要
动静压差是气体减压阀一项主要性能指标,分析了一种航天发射领域广泛应用的气体减压阀动静压差产生的原因,通过理论推导得到了基于动态数据计算对应静态压力和动静压差的公式,然后通过该公式研究了进出口压力、气体流量、敏感活塞面积等影响减压阀动静压差的因素,得到了以下结论:动静压差随着出口压力、气体流量的增加而增大,随敏感活塞面积增加呈"U"字形趋势,最后通过试验验证了所得公式的正确性。提出的研究方法也可供其他类型气体减压阀的动静压差分析提供参考。
Static and dynamic pressure difference is a main performance index of gas pressure reducing valve. We explain the reason of the occurrence of static and dynamic pressure difference in a gas pressure reducing valve widely used in space launch. A formula for calculating the corresponding static pressure and static and dynamic pressure difference based on dynamic data is deduced. On the basis of the formula, the factors influencing the static and dynamic pressure difference including inlet and outlet pressure, flow rate, and sensing piston area are studied. The results are as follows: the static and dynamic pressure difference keeps increasing with an enlarging outlet pressure and gas flow rate, and shows a U-shaped trend with the augment of sensing piston area. A series of experiments are conducted and they prove the correctness of the formula. The proposed method can be used as a reference for static and dynamic pressure difference analysis of other types of gas pressure reducing valve.
作者
郭珣
樊蕾
GUO Xun;FAN Lei(Beijing Institute of Space Launch Technology, Beijing100076)
出处
《液压与气动》
北大核心
2019年第5期87-91,共5页
Chinese Hydraulics & Pneumatics
关键词
气体减压阀
动静压差
理论推导
试验验证
gas pressure reducing valve
static and dynamic pressure difference
theoretical deduction
experiment test
