300MN模锻水压机水阀启闭动作响应的研究  

Research on Response of Opening and Closing Movement of Water Valve for 300 MN Die Forging Hydraulic Press

作　　者：孙康[1,2] 吴欣[1] 陈晖[2] 

机构地区：[1]江西理工大学机电工程学院,江西赣州341000 [2]中南大学机电工程学院,湖南长沙410083

出　　处：《机床与液压》2015年第1期24-27,共4页Machine Tool & Hydraulics

基　　金：国家科技重大专项(2009ZX04005-031);国家重点实验室开放基金(GZKF-201023);江西省自然科学基金项目(20122BAB206030)

摘　　要：以带先导卸荷阀结构的大型水压机高压大流量水阀为研究对象。对高压大流量水阀的结构及原理进行分析,建立其机制的动态数学模型,系统地研究了该水阀的启闭动作时间响应问题,分析工作水压、系统增益以及凸轮磨损量对水阀启闭动作响应时间的影响规律。利用matlab/simulink数值仿真软件,对该模型进行数值模拟仿真分析,得到了水阀响应时间、系统增益、系统水压以及凸轮磨损量之间的相互关系。仿真结果表明:水阀开启响应具有瞬变性,并且主阀的开启速度越快,瞬变性越明显;在同一水压下,随着增益的增加,主阀的响应越快。仿真结果证明了研究的有效性,由于水阀启闭动作时间直接影响水压机的操作性能,水阀启闭时间的滞后是导致驱动系统出现故障的主要原因。研究结果为水阀的开启优化、液压机的故障诊断以及液压机的正确使用及维护提供了参考。The water valve with the leading discharged valve under high pressure and large flux of a large hydraulic press was re？searched as an object. The structure and principle of high pressure and large flow water valve was analyzed, its dynamic mathematical model of the mechanism was established, and the problem of opening and closing movement response time of the valve was researched systematically. The influence law of the operation water pressure, system gain and cam wear on the valve opening and closing movement response time were analyzed. By using the Matlab/Simulink numerical simulation software to analysis the model, the interrelations be？tween the water valve’ s response time and the system gain, the system pressure and cam wear were obtained. The simulation results show that the water valve has a transient nature in response, and the faster the main valve is opened, the more obvious is the transient nature. Under the same water pressure, as the gain increased, the response of the main valve becomes faster. The simulation results prove the effectiveness of this research, the opening and closing movement time of the valve directly affects the performance of hydraulic machine operation, so the opening and closing time lag of the valve is the main cause of the drive system malfunction. The research re？sults provide references to the optimization for opening and closing of the water valve, the hydraulic machine fault diagnosis, proper use and maintenance of hydraulic press.

关 键 词：水压机 系统参数 响应时间 操作性能 故障诊断 

分 类 号：TG315[金属学及工艺—金属压力加工]