平面磨床泵控液压系统速度特性研究  

Speed characteristics of pump-controlled hydraulic system of surface grinding machine

作　　者：李斌[1] 赵瑞 张天贵 孙琦 闫桂山 艾超[1] LI Bin;ZHAO Rui;ZHANG Tian-gui;SUN Qi;YAN Gui-shan;AI Chao(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;School of Intelligent Systems Engineering,Sun Yat-Sen University,Guangzhou 510275,China)

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]中山大学智能工程学院,广东广州510275

出　　处：《机电工程》2023年第5期723-730,756,共9页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(52275066);河北省重点研发计划项目(20314402D);新疆维吾尔自治区自然科学基金资助项目(2021D01A63);河北省高等学校科学技术研究项目(ZD2021340)。

摘　　要：针对平面磨床泵控液压系统中的速度特性问题,采用S型曲线规划伺服电机转速,配合使用蓄能器添加阻尼的方法,并结合仿真与实验对其展开了研究。首先,从系统数学模型入手,建立了伺服电机、定量泵与阻尼等关键元件的数学模型;然后,利用AMEsim仿真软件搭建了系统的仿真模型,对系统中蓄能器与阻尼的使用配合S型电机速度曲线进行了验证,提高了液压系统运行的稳定性;最后,为了验证仿真结果的可靠性,搭建了一个平面磨床泵控液压系统实验平台,对负载运行的速度特性进行了实验研究,并将实验数据与仿真结果进行了对比分析。研究结果表明:液压系统优化后,插装阀阀芯动作的稳定性、准确性、系统压力波动与油缸运行速度平稳性得到了改善,最终速度超调量减小了79.3%;同时,实验结果与仿真结果基本吻合,液压缸压力与运动速度稳定性都有所提升,系统整体运行品质得到了改善。Aiming at the problem of speed characteristic of pump-controlled hydraulic system of surface grinding machine,the S-shaped curve was used to plan the speed of the servo motor and the method of adding damping by accumulator,and it was studied by combining simulation and experiment.Firstly,from the mathematical model of the system,the mathematical model of key components such as servo motor,quantitative pump and damping was established.Then,the simulation model of the system was built by using AMEsim simulation software to inprove the stability of the hydraulic system by using the accumulator and damping in the system with the speed curve of the S-type motor.Finally,in order to verify the reliability of the simulation results,an experimental platform of pump-controlled hydraulic system of surface grinder was built,and the experimental research was conducted for the speed characteristics of load operation,and the experimental data were compared with the simulation results.The research results show that,after the optimization of hydraulic system,the stability and accuracy of the cartridge valve core action,the system pressure fluctuation and the smoothness of the cylinder running speed are improved,and the final speed overshoot is reduced by 79.3%.At the same time,the experimental verification results are basically consistent with the simulation results.The stability of the hydraulic cylinder pressure and the movement speed is improved,and the overall operation quality of the system is improved.

关 键 词：平面磨床 泵控系统 速度波动 仿真模型 AMESIM 插装阀阀芯 

分 类 号：TH137.52[机械工程—机械制造及自动化]