直驱泵控伺服液压机节能分析及试验研究

Analysis and Experiment Research on Energy-saving Mechanism of Direct Drive Pump-controlled Servo Hydraulic Press

直驱泵控伺服液压机采用定量泵和交流永磁同步电机作为动力单元,该伺服液压系统依靠改变电机转速实现系统流量调节,从而实现对液压系统的控制。与传统的阀控系统相比,具有体积小、高效节能、可靠性高等特点,是目前电液驱动技术发展的一个新方向。以拉深工艺为例,分析系统的节能原理,进行了普通液压机和伺服液压机能耗对比的试验研究。分析泵控伺服液压机的主要节能环节:容积调速、待机停止。通过样机试验可得:直驱泵控伺服液压机比普通多功能拉深液压机节约了20%以上的能量。

Direct drive pump-controlled servo hydraulic press which combines the fixed displacement pump and permanent-mag-net motor together is a new electromechanical integration power unit of energy-saving. This hydraulic servo system is controlled by dif-ferent pump＇s flow,which is realized by changing the speed of the motor. Comparing with the traditional valve-controlled system,it has the advantages of small volume,energy saving,high efficiency,high reliability. So it is considered to be a new direction of electric-hy-draulic drive technology. Taking the drawing process as example,based on the principle of energy conservation,the energy comparison experimental study of ordinary hydraulic and servo hydraulic was carried out. The servo controlled hydraulic pump main energy saving loops：volume control,standby stops,were analyzed. The prototype testing results indicate that the direct drive pump-controlled servo hydraulic press saves over 20% energy compared to the traditional hydraulic press.