液压驱动控制的偏心回转系统同步特性

Synchronization Characteristics Research of Eccentric Gyration System Controlled by Hydraulic Driving

以液压振动桩锤这种大功率惯性振动机械为对象,用机电液耦合动力学理论研究液压驱动控制的偏心回转系统的自同步特性问题。建立无相位差监控的惯性振动机同步系统的机电液耦合模型,对该模型进行仿真研究,分析摩擦转矩、动刚度、动阻尼、激振器结构参数和液压马达泄漏等各种因素对自同步系统稳定工作过程和过渡过程的影响。建模和仿真结果显示,上述各种因素之间及其与振动机的机体之间相互影响、具有复杂的耦合关系,可以通过修正阻尼、刚度、泄漏系数及激振器结构参数等,来提高同步效果,其中刚度和泄漏系数调节效果最明显。研究表明,建模仿真正确反映了上述各种因素影响与振动机的机体之间的耦合关系,对于优化液压驱动的振动机械机电液系统设计具有理论指导意义。

A high-power inertial vibration machine-hydraulic vibratory pile hammer is taken as the object, and mechanical-electrical-hydraulic coupling dynamics theory is used to study the self-synchronization characteristics problem of eccentric gyration system controlled by hydraulic driving. A mechanical-electrical-hydraulic coupling model of inertial vibration machine synchronization system without phase difference monitoring is established. Simulation study on this model is carried out, and the effects of various factors, such as friction torque, dynamic stiffness, dynamic damping, exciter structure parameters ~ad hydraulic motor leakage, on the stable working and transition processes of self-synchronization system. Modeling and simulation results show that there are interactions and complex coupling relationships among the above-mentioned factors and between the factors and the body of vibration machine. The synchronization effect can be improved by amending damping, stiffness, leakage coefficient and exciter structure parameters, etc. Among them, the effects of regulations of stiffness and leakage coefficient are most obvious. Research shows that the modeling and simulation correctly reflect the influences of the said factors and the coupling relations between the factors and body of vibration machine, which has a theoretical guiding significance to the optimized design of mechanical-electrical- hydraulic system of the hydraulic-driven vibration machine.