注塑机液压系统能耗分析及升压节能仿真分析

Energy consumption analysis of the hydraulic system of an injection molding machine and its simulation analysis of energy saving after boosting pressure

针对注塑机液压系统受预塑马达压力限制导致的工作压力偏低、流量较大,系统能量损耗高等问题,通过采用高压液压元件,可以提高注塑机液压系统的工作压力,实现注塑机液压系统高压化,从而降低注塑机能量损耗,并基于仿真分析研究其节能效果。在注塑机工作负载不变的情况下,液压系统所需输出功率不变,系统工作压力提高后,系统输入流量反比例减少,液压阀口和管路的局部阻力损失均随之降低。基于AMESim仿真环境建立注塑机液压系统的仿真模型,比较合模油缸升压前后系统压力损失及能耗。仿真结果表明,在开、合模阶段,系统压降减少70%,压降能耗降低85%,总功耗损耗减少3.7%。

Aiming at the problems of a low working pressure,a large input flow and a high energy consumption caused by the pressure limitation of hydraulic motors in the hydraulic system of an injection molding machine,this paper studies the energy-saving effect based on simulation analysis.The use of high-pressure hydraulic componentsincreases the working pressure of the hydraulic system.In this view,the high-pressure hydraulic system of an injection molding machine is realized so as to reduce the energy loss of the machine.Under the condition that the working load of the machine remains unchanged,the output power of the hydraulic system is constant.By increasing the working pressure of the system,the input flow of the system reducesin an inverse proportion,thereby reducing the local resistance loss of both the valve port and the pipeline.Based on the AMESim,the simulation model of the hydraulic system of an injection molding machine is established.The case in point lies in the clamping cylinder,in which the system pressure loss and energy consumption before and after the pressure boosting are compared.The results show that,during the opening and clamping stages,system pressure drop reduces by 70%,energy consumption pressure drop reduces by 85%,and the total power consumption reduces by 3.7%.