摘要
以应用于某电力系统中电力开关精密控制的电液执行系统为研究对象,针对其工作特性不满足工程实际需求的问题,从其关键组成部件——流量匹配阀的结构参数研究入手,对电液执行系统的工作特性进行了理论分析、仿真分析以及试验测试。首先,对阀门内部结构和系统工作原理进行了分析;然后,建立了该电液执行系统的数学模型及仿真模型,经试验验证了该仿真模型的可行性与准确性;最后,探究了流量匹配阀的单因素结构参数对电液执行系统工作特性的影响规律,设计并进行了正交试验,得到了可选范围内的最优结构参数组合方案。研究结果表明:流量匹配阀的阀座钢球密封弹簧预紧力、阀座钢球密封弹簧刚度以及阀口初始遮盖量等结构参数对电液执行系统的工作特性都有重要影响,最优结构参数方案相较于原方案,系统的响应时间由133 ms缩短为42 ms,定位精度由0.261%提高至0.096%,可有效缩短系统响应时间,提高系统定位精度,满足工程实际需求。
Taking the electro-hydraulic actuator system used for precision control of power switches in a certain power system as the research object,in view of the problem that its working characteristics do not meet the actual needs of the project,taking a study for the structural parameters of the flow matching valve as a key component,theoretical analysis,simulation analysis,and experimental testing were conducted on the working characteristics of the electro-hydraulic actuator system.Firstly,the internal structure of the valve and the working principle of the system were analyzed.Then,the mathematical model and simulation model of the electro-hydraulic actuator system were established,and the feasibility and accuracy of the simulation model were verified through experiments.Finally,the influence of the single-factor structural parameters of the flow matching valve on the operating characteristics of the electro-hydraulic actuator system was explored,the orthogonal tests were designed and conducted,and the optimal structural parameter combination scheme within the optional range was obtained.The research indicates that the structural parameters such as the preload force of the valve seat steel ball seal spring,the stiffness of the valve seat steel ball seal spring,and the initial covering amount of the valve port of the flow matching valve have an important impact on the working characteristics of the electro-hydraulic actuator system.Comparing with the original plan,the optimal structural parameters scheme,the system response time is shortened from 133 ms to 42 ms,and the positioning accuracy is improved from 0.261% to 0.096%,which can effectively shorten the system response time,improve the system positioning accuracy,and meet the actual needs of the project.
作者
张天爱
张宏
孙娜
刘日麟
吴阔
ZHANG Tianai;ZHANG Hong;SUN Na;LIU Rilin;WU Kuo(School of Mechanical Engineering,Dalian University of Technology,Dalian 116023,China;National Key Laboratory of High Performance Precision Manufacturing,Dalian University of Technology,Dalian 116023,China;China Shipbuilding Industry Group Co.,Ltd.,Harbin 150036,China)
出处
《机电工程》
CAS
北大核心
2024年第6期969-979,共11页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(52175044)。
关键词
液压控制阀
电液执行系统
流量匹配阀
AMESIM
响应时间
定位精度
正交试验
hydraulic control valve
electro-hydraulic actuator
flow matching valve
AMESim
response time
positioning accuracy
orthogonal test
