液压挖掘机动臂节能系统分析

Analysis about Boom Energy Saving System of Hydraulic Excavator

针对液压挖掘机动臂下降过程中大量势能转化为热能的工况,对普通的动臂液压回路、动臂流量再生回路和动臂势能回收系统进行了分析和比较,根据动臂下降过程中能量的变化,改进设计了带势能回收的流量再生回路系统。以23t液压挖掘机为研究对象,分析并计算了4种回路的功率分配和能量损耗。采用仿真软件AMEsim建立仿真模型,对4种回路的运行参数和能量损耗进行对比,并对带势能回收的流量再生回路的关键参数进行分析。仿真结果表明:选择合适参数的带势能回收的流量再生回路大大降低了节流阀上能耗,具有较高的能量利用率。

Aiming at the situation of a lot of potential energy changing into heat during the hydraulic excavator＇s boom going down, the common boom hydraulic loop, boom flow-regeneration loop and boom potential energy recovery system were compared and analyzed. According to the energy changing in the process of boom going down, the flow-regeneration loop with energy recovery system was designed with improvement. By the study object of 23 ton hydraulic excavator, the power distribution and energy loss of the four loops were calculated analytically. The simulation model by AMEsim software was established, the running parameters and energy loss of the four loops were compared, and key parameters about the flow-regeneration loop with energy recovery device were analyzed. Sim- ulation results show that the flow-regeneration loop with energy recovery device can greatly reduce the energy loss on the throttle valve by choosing suitable parameters, and has high energy using efficiency.