氢能源汽车车载超高压气动减压阀的机理与特性分析  

Mechanism and property analysis on ultrahigh-pressure pneumatic decompressing valve for hydrogen vehicles

作　　者：訚耀保[1] 陈洁萍[1] 罗九阳[1] 马建新[2] 

机构地区：[1]同济大学机械工程学院,上海201804 [2]同济大学汽车学院,上海201804

出　　处：《中国工程机械学报》2008年第3期310-314,323,共6页Chinese Journal of Construction Machinery

基　　金：国家"八六三"高技术研究发展计划资助项目(2007AA05Z119);上海市浦江人才计划资助项目(06PJ14092);国家自然科学基金资助项目(50775161)

摘　　要：分析了车载超高压气动减压阀的工作机理、基本特性及其影响因素.气动减压阀阀芯与阀套在结构上形成压力反馈腔,将负载压力反馈给弹簧,稳定出口压力.分析结果表明:阀内流道的等效阻尼长度和压力反馈腔体积是影响阀出口压力的重要因素.流道等效阻尼越小,阀口关闭越快,出口压力波动越小;压力反馈腔体积越大,其压力缓冲作用越明显,出口压力波动越小,但延迟时间越长.In this study, the mechanisms, properties and impacts are analyzed on the ultrahigh-pressure pneumatic decompressing valve for hydrogen vehicles. Owing to the structure of valve case and axle, a decompressing chamber is formed. Accordingly, the pressure can be decompressed via the spring to stabilize the orifice pressure. To this end, it is detected from the simulation results that the equivalent valve damping length and decompressing chamber volume significantly affect the outlet pressure. In details, the orifice pressure fairly fluctuates due to small equivalent damping and fast-closed orifice. In the same manner, small orifice pressure fluctuation is associated with large decompressing chamber volume in terms of high buffering and delaying.

关 键 词：气动 氢能源汽车 减压阀 阻尼长度 压力反馈腔 

分 类 号：TH138.52[机械工程—机械制造及自动化]