The kind of pump improves greatly the control efficient and control accuracy and simply the design of hydraulic system with proportionalregulation and save the energy of hydraulic systems.
Experimental results have shown that the system features precise speed control and simple design as compared to the sensing circuit controlled by T-type proportional speed regulation valve.
试验结果表明，与比例三通调速阀控制的敏感回路相比，该系统速度控制精度高，结构简单。
3
The winch adopted valve-controlled proportional speed regulation hydraulic drive and PLC control to realize stepless speed change of the winch drum and coordinating control of the cable layer.