摘要
汽车起重机卷扬升降作业时,其液压控制回路的微动特性与整机的平稳性以及安全性密切相关。以卷扬液压系统为研究对象,通过系统仿真、系统与元件实时联合仿真以及试验测试并行的研究方法,分析了其微动特性。结果表明:原始主阀杆因阀口面积梯度突变而产生节流拐点现象,通过优化主控阀节流阀口与回油阀口结构,有效改善了主控阀的节流特性;原有大通径三口阀因弹簧预紧力过大、刚度相对较小时呈现“速关、速开”响应状态,通过按比例缩放三口阀通径、减小调压弹簧预紧力以及合理匹配其刚度参数和优化其阀口面积曲线,有效改善了卷扬系统回路压力超调的问题。
When the winche of automobile crane are lifting and lowering,the micro-motion characteristics of its hydraulic control circuits are closely related to the smoothness and safety of the whole machine.The winch hydraulic system is taked as the research object,and its micro-motion characteristics is analyzed,which is based on the parallel research method of system simulation,real-time joint simulation of the system and components,and experimental test.The results show that the original main valve stem experienced a throttling inflection point due to a sudden change in valve port area gradient.This study effectively improved the throttling characteristics of the main control valve by optimizing the structure of the throttle valve port and return valve port.The original large diameter three port valve exhibited a"quick closing,quick opening"response state due to excessive spring preload and relatively low stiffness.This study effectively improved the problem of pressure overshoot in the winch system circuit by scaling the three port valve diameter proportionally,reducing the preload force of the pressure reducing spring,and reasonably matching its stiffness parameters and optimizing its valve port area curve.
作者
高名乾
贺建强
李固
冀宏
郭敏杰
GAO Mingqian;HE Jianqiang;LI Gu;JI Hong;GUO Minjie(Guangxi Zhongyuan Machinery Co.,Ltd.,Liuzhou,Guangxi 505007;Guangxi Liugong Machinery Co.,Ltd.,Liuzhou,Guangxi 545007;College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050)
出处
《液压与气动》
北大核心
2025年第3期81-89,共9页
Chinese Hydraulics & Pneumatics
基金
广西科技计划项目(AB22035040)。
关键词
卷扬液压回路
动态特性
实时联合仿真
性能改善
试验测试
winch hydraulic circuit
dynamic characteristics
real-time co-simulation
performance improvement
experimental test
作者简介
高名乾,男,1982年生,辽宁锦州人,高级工程师,硕士,主要研究方向为现代液压元件及系统的开发应用。E-mail:gaomq@liugong.com;通信作者:贺建强,男,1997年生,甘肃会宁人,工程师,硕士,主要研究方向为流体传动与控制。E-mail:3475824112@qq.com;李固,男,1989年生,湖北咸宁人,工程师,学士,主要研究方向为现代液压元件及系统的开发应用。E-mail:ligu@liugong.com;冀宏,男,1972年生,陕西宁陕人,教授,博士,主要研究方向为现代液压元件基础理论及其应用。E-mail:jihong@lut.edu.cn;郭敏杰,男,1998年生,广西桂平人,工程师,硕士,主要研究方向为流体传动与控制。E-mail:491450674@qq.com。
