正铲液压挖掘机水平推压作业时液压缸流量特性研究

Research on flow characteristics of cylinders during horizontal pushing operation of forward hydraulic excavator

建立某大型正铲液压挖掘机的三维虚拟样机模型,将铲斗齿尖设定为匀速水平运动,借助MATLAB进行运动学逆解计算,得出实现匀速水平推压作业时各液压缸的运动速度和流量特性。在Pro/E中以工作液压缸的速度为控制信号,输入三维模型中进行仿真,验证了匀速水平推压效果。所得结论为改善正铲液压挖掘机作业效果并降低工作装置的振动冲击提供了参考。

The 3D virtual prototype model of a large forward hydraulic excavator was built up, and the tip of the bucket tooth was set as constant-speed horizontal motion. MATLAB was applied to conduct inverse kinematics solution, and the motion speed and flow characteristics of various cylinders during constant-speed horizontal pushing operation were obtained. And then, in Pro/E, the speed of operating cylinders served as control signal to input into the 3D model to conduct simulation, so as to verify the constant-speed horizontal pushing effects. The results offered reference for improving the operation effects of the forward hydraulic excavator and reducing the vibration and impact of the working device.