两种电液比例快锻系统能耗特性实验研究

Experimental research on energy consumption in two kinds of electro-hydraulic proportional high-speed hydraulic press

从能耗角度出发,以采用四通道负载口独立控制的电液比例快锻系统和采用蓄势器的电液比例快锻系统为研究对象,介绍了两种快锻系统的工作和控制原理,并建立了其能耗计算模型,以0.6 MN快锻液压机实验平台为依托,进行了快锻工况下两种系统的控制特性和能耗特性的实验研究,得到了两种系统能耗分布规律。实验结果表明:两种快锻系统的位置跟随特性良好,加载时位置误差均小于1 mm,但是都存在较严重的溢流和节流损失,两者有用功占总输入功的比重低下,其中采用四通道负载口独立控制的快锻系统有用功仅为5.4%,采用蓄势器的电液比例快锻系统有用功仅为7.8%。

For the electro-hydraulic proportional high-speed forging hydraulic presses controlled by four-channel MIMO and accumulator respectively according to the energy consumption,their working and control principles were introduced,and the energy consumption calculation models were set up respectively. According to experiment platform of forging hydraulic press 0. 6 MN,the experimental researches on control characteristic and energy consumptions were carried out under high-speed forging conditions respectively,and their energy consumption distribution rules were obtained respectively. Result shows that both these two systems have good position tracking and their position error under loading can be limited within 1 mm. However,they have serious overflow and throttling losses,and the proportion of useful work to the total input power is low,which is 5. 4% and 7. 8% in the high-speed forging hydraulic press system by four-channel MIMO control and accumulator respectively.