一种高速脉冲阀动态特性  

Dynamics of Three Stage High Speed Pulse Valve

作　　者：魏超[1] 吴维[1] 林硕[1] 苑士华[1] 

机构地区：[1]北京理工大学车辆传动国家重点实验室,北京100081

出　　处：《机械工程学报》2011年第6期138-142,130,共6页Journal of Mechanical Engineering

基　　金："十一五"国家部委基础科研资助项目(A2220060053)

摘　　要：介绍一种三级高速脉冲阀结构,研究其动态特性并讨论其影响因素。高速脉冲阀的主阀和次阀均采用锥阀,在结构分析的基础上,分析其工作原理,建立系统动态特性数学模型并进行仿真分析,结合试验结果对高速脉冲阀动作过程进行研究,同时分析其动态特性的关键影响因素。研究结果表明高速脉冲阀的先导阀和次阀先后控制主阀芯动作的模式,具有开关响应速度快和通流能力强的特点。主阀通径根据流量需求确定,次阀通径根据主阀响应要求确定,先导阀响应速度决定了主阀所能达到的最高响应速度,同时需要有效减小背压腔容积和阀芯间隙。高速脉冲阀开阀瞬间阀芯开度大,响应时间在10 ms以内,阀芯开度与流量需求呈自适应关系。The structure of a three-stage high-speed pulse valve is introduced,its dynamic performances studied and its influencing factors discussed.The main valve and the secondary valve of the high-speed pulse valve are cone valves.Based on the structural analysis of the valve,the operating principle is investigated.The mathematical model of the dynamic performance of the system is built and simulation analysis is carried out.The action process of the high-speed pulse valve is studied by combining with experimental results,and the key factors influencing its dynamic performances are analyzed.The results indicate that the mode of the main spool action is controlled by the pilot and secondary valves of the high-speed pulse valve one after another,thus achieving a high-speed on-off response and a high flow capacity.The main valve diameter of the high-speed pulse valve is determined by the demand for flow while the secondary valve diameter is determined by the response requirement of the main valve.The response speed of the pilot valve limits the max response speed of the main valve.The volume of the backpressure chamber and the gap between spools need to be reduced.The high-speed pulse valve reaches a large flow area in the instantaneous moment of opening,with a response time less than 10 ms.The relationship between the valve flow area and flow requirement is self-adapted.

关 键 词：液压元件 脉冲阀 动态特性 仿真 

分 类 号：TH-55[机械工程]