高水基大流量比例换向阀设计及动静态特性分析  

Design and Dynamic and Static Characteristics Analysis of High Water-Based and Large-Flow Proportional Directional Valve

作　　者：王雷雷 廉自生[1,2] 席文韬 张喆 WANG Leilei;LIAN Zisheng;XI Wentao;ZHANG Zhe(College of Mechanical Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;Shanxi Key Laboratory of Fully Mechanized Coal Mining Equipment,Taiyuan University of Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]太原理工大学机械工程学院,山西太原030024 [2]太原理工大学,煤矿综采装备山西省重点实验室,山西太原030024

出　　处：《机床与液压》2025年第1期95-102,共8页Machine Tool & Hydraulics

基　　金：国家自然科学基金面上项目(52175058)。

摘　　要：针对煤矿综采工作面液压支架智能化发展的需要,为提高液压支架动作的控制精度并减小工作过程的冲击载荷,提出一种采用双先导阀控制的新型高水基大流量比例换向阀。该阀由两个先导阀与主阀组成,两先导阀分别为二位三通常闭电磁先导阀与二位二通常开高速开关阀。建立换向阀数学模型,并由此建立主阀的MATLAB-Simulink仿真模型,分析反馈口宽度、阀芯受力面积等参数对主阀动静态特性的影响。同时,采用AMESim软件进行建模及仿真,并与Simulink仿真结果相互验证。结果表明:斜坡信号输入下,占空比与进液阀芯位移成近似比例关系,滞环指标约为12%;阶跃响应下,比例阀开启时间约37 ms,关闭时间约40 ms;不同占空比信号输入下,阀芯位移均能保持稳定。Aiming at the need of intelligent development of hydraulic support in fully mechanized mining face in coal mine,to improve the control accuracy of hydraulic support action and reduce the impact load in the working process,a new type of high water-based and large-flow proportional directional valve controlled by double pilot valves was proposed.The valve was composed of two pilot valves and a main valve,the two pilot valves were two-position three-way closed electromagnetic pilot valve and two-position two-way opened high-speed on-off valve respectively.A mathematical model of the valve was built,the MATLAB-Simulink simulation model of the main valve was established,and the influence of key parameters on its dynamic and static characteristics was analyzed.At the same time,AMESim software was used for modeling and simulation,and the simulation results were mutually verified with Simulink.The simulation results show that there is an approximate proportional relationship between duty cycle and valve core displacement under ramp signal input,and the hysteresis index is approximately 12%.Under the step response,the opening time of proportional valve is about 37 ms,and the closing time is about 40 ms.Under different duty cycle signal inputs,the displacement of the valve core can remain stable.

关 键 词：比例换向阀 流量反馈 仿真分析 动态特性 

分 类 号：TH137.52[机械工程—机械制造及自动化]