摘要
开关容积减压是为提高效率而提出的一种新型减压方法。对其关键元件超高压大流量气动开关阀的原理、动态特性进行详细的理论和试验研究。利用气动力平衡,解决超高压主阀心驱动力大和响应慢的难题,设计出小流量驱动大开口的超高压大流量开关阀。提出以定容积过程和变容积过程为单元,以控制腔转折点气体压力为标志,对超高压气动开关阀的开启和关闭动态过程进行细分的原则;建立了基于动态过程细分原则的非线性数学模型;分析了超高压气动开关阀动态特性的影响因素、改善措施。仿真和试验表明,所建立的数学模型和理论分析与试验结果是吻合的。
The extra-high pressure pneumatic on-off valve is
very important part in a new pressure reducing method by ex-
pander that is used for enhancing the efficiency of extra-high
pressure pneumatic power system. The operation principle and
dynamic property of the valve are detailedly investigated by
means of theoretical and experimental way. The problem of
needing large driving power and slowing response in extra-high
pressure pneumatic on-off valve is solved by means of pneu-
matic dynamic force balance method. A two-stage valve that
used a pilot solenoid spherical valve to control a large flow-rate
poppet valve is developed. The definitions and rules of dynamic
processes based on the control chamber volume changing or not,
and on the key pressure points in the control chamber are put
forward. The mathematical models of the valve are obtained
based on above definitions and rules. Some influencing factors
to the valve are analyzed. The results show that the dynamic
property of the valve is corresponding between simulation and
test.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2004年第5期77-81,共5页
Journal of Mechanical Engineering
基金
国家自然科学基金(50122115)
关键词
超高压气动
大流量气动开关阀
建模
动态特性
Extra-high pressure pneumatic
Pneumatic on-off valve
Model Dynamic property