负载口独立控制系统的节能边界

为了找寻负载口独立控制系统的极限节能边界,并明晰其节能机理,建立传统阀控系统和负载口独立控制系统的静态效率与静态能耗模型,利用归一化处理使模型转化为无量纲形式。选取与传统阀控系统可比拟的2种工况,即同泵源压力和同阀口开度,在负载口独立控制系统处于节能极限时(出油阀口全开)进行对比。仿真分析不同工况下2种系统的静态效率与能耗对比情况,并绘制效率分布谱获取全工况下效率分布对比情况。结果表明:同泵源压力下,负载口独立控制系统最多能提升阀控液压系统效率约5.7%,降低能耗约22.7%;同阀口开度下,负载口独立控制系统最多能提升阀控液压系统效率约19.4%,降低能耗约53%。负载口独立控制系统能够降低阀口节流损耗,进而降低阀控液压系统能耗。

Energy Saving Boundary of the Independent Metering System

In order to find the ultimate energy saving boundary and clarify the energy saving mechanism of the independent metering system (IMS), static efficiency models and static energy consumption models of the conventional valve-controlled system (CVS) and the IMS are established, and then simplified to non-dimensional form by normalization method. Two kinds of working conditions which can be compared with the CVS are selected, that is, the same pump pressure source conditions and the same orifices area conditions. The comparison is made when the IMS is in the ultimate energy saving condition (the meter-out orifice is full-opened). Finally, the static efficiency and static energy consumption of two systems under different working conditions are analyzed by simulation. The comparison of efficiency distributions under all working conditions is obtained by the efficiency mapping. The results show that under the same pump source pressure, the IMS can improve the efficiency by about 5.7% and reduce the energy consumption by about 22.7% at most. Under the same orifices area, the IMS can improve the efficiency by about 19.4% and reduce the energy consumption by about 53% at most. The IMS can reduce the throttling loss of the orifices, and thus reduce the energy consumption of the CVS.