高速开关阀控液压马达系统性能对比研究  

Comparative Research on the Performance of Hydraulic Motor High Speed On/Off Control System

作　　者：王喆[1] 施光林[1] WANG Zhe;SHI Guanglin(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《机床与液压》2023年第23期97-101,共5页Machine Tool & Hydraulics

摘　　要：采用一款高响应电液伺服阀并使其处于阀口开、关两种极限工况下工作的高速开关控制方式,构建一种阀控液压马达系统,实现对液压马达输出转速及扭矩的控制,以探究液压马达高速开关控制方法的基本特性。完成该高速开关阀控液压马达系统的设计及AMESim仿真模型的搭建。利用PWM信号控制高响应电液伺服阀实现对液压马达的高速开关控制,并通过仿真获得转速等参数随占空比和频率的变化规律。开发基于高响应电液伺服阀的高速开关阀控液压马达系统实验样机,进行实验与仿真结果的对比研究。结果表明:实验与仿真结果较为一致,液压马达转速随着占空比的增大而增大,随着外负载的增大逐渐降低;而仿真结果中负载的增加会轻微加快液压马达转速的稳定时间的结论,在实验中无法得到印证。Using a high-response electro-hydraulic servo valve and making it work under the two extreme working conditions of valve port opening and closing,a valve-controlled hydraulic motor system was constructed to realize the control of the output speed and torque of the hydraulic motor,so as to explore the basic characteristics of the high-speed switch control method of the hydraulic motor.The design of the high-speed on/off valve-controlled hydraulic motor system and the construction of the AMESim simulation model were completed.The PWM signal was used to control the high-response electro-hydraulic servo valve to realize the high-speed switc-hing control of the hydraulic motor,and the variation law of parameters such as rotation speed with duty cycle and frequency was ob-tained through simulation.An experimental prototype of a high-speed on/off valve-controlled hydraulic motor system based on a high-response electro-hydraulic servo valve was developed,and the experimental and simulation results were compared.The results show that the experimental and simulation results are consistent,and the speed of the hydraulic motor increases with the increase of duty cy-cle,and gradually decreases with the increase of external load.However,the conclusion that the increase of load will slightly acceler-ate the stability time of the hydraulic motor speed in the simulation results cannot be confirmed in the experiments.

关 键 词：高速开关控制 阀控液压马达系统 PWM信号 占空比 频率 转速 

分 类 号：TH137[机械工程—机械制造及自动化]