摘要
针对液压马达驱动负载系统中,马达输出轴的转速波动特性直接影响负载工作稳定性和可靠性的问题,建立典型液压马达-负载系统的动力学模型,阐明液压马达等效弹簧扭转刚度的计算方法;根据非线性动力学原理,分析等效液压弹簧扭转刚度和摩擦转矩对系统转速波动特性的影响机制,提出利用高频采样计数方法对转速波动进行测试与分析。理论分析与实验结果均表明:非线性摩擦转矩、输出容积脉动、负载转矩、油液有效体积弹性模量等因素的变化影响系统的转速波动特性。
In hydraulic motor driving load system,speed fluctuation characteristics of motor shaft directly affect the stability and reliability of load.The dynamic model of typical hydraulic motor-load system was established,and the calculation method of equivalent spring torsional stiffness of hydraulic motor was expounded.According to the principle of nonlinear dynamics,the influence mechanism of torsional stiffness and friction torque on the speed fluctuation characteristics of the system was analyzed,and the high frequency sampling and counting method of the speed fluctuation measurement and analysis was put forward.The theoretical analysis and experimental results consistently indicate that the variation of nonlinear friction torque,output volume ripple,load torque and effective bulk elastic modulus of oil affect the speed fluctuation characteristics of the system.
作者
刘佳敏
孟帅
谷立臣
LIU Jiamin;MENG Shuai;GU Lichen(College of Mechanical Engineering,Shaanxi Polytechnic Institute,Xianyang Shaanxi 712000,China;Xi’an Aviation Brake Technology Co.,Ltd.,Xi’an Shaanxi 710038,China;School of Mechatronic Engineering.Xi’an University of Architecture and Technology,Xi’an Shaanxi 710055,China)
出处
《机床与液压》
北大核心
2023年第6期25-30,共6页
Machine Tool & Hydraulics
基金
国家自然科学基金项目(51675399)
陕西工院引进高层次人才科研启动经费(BSJ 2021-11)。
关键词
液压马达
转速波动
非线性
机液耦合
Hydraulic motor
Speed fluctuation
Nonlinear
Mechanic-hydraulic coupling
