液压挖掘机回转能量回收系统研究
Exploring Slewing Energy Recovery System of Hydraulic Excavator

为提高液压挖掘机的能量利用率,提出一种以液压蓄能器为储能元件的回转能量回收系统;对回收系统的主要元件进行数学建模,并在此基础上搭建回收系统仿真模型;对回收能量的再利用方案合理性、蓄能器参数对系统能量回收与再利用的影响以及增加能量回收系统后整机的操控性进行仿真评价。仿真结果表明:该能量回收系统在单回转工况下能够实现整机41.99%的能量回收与再利用,且能保证整机的良好操控性能。最后,通过实验验证能量回收与再利用方案的可行性以及仿真模型的正确性。
In order to raise the energy efficiency of a hydraulic excavator, we propose a slewing energy recovery system that uses an energy accumulator. The mathematical model of the energy recovery system is built, and its simulation is conducted. Through a number of computer simulations, we analyzes whether the energy recycle precept is proper, the influence of parameters of the energy accumulator on energy recovery ratio and how the added energy recovery system affects the control performance of the energy recovery system. The simulation results demonstrate that the energy recovery system can indeed raise the energy recovery and recycle ratio to 41.99%, while its great control performance is maintained. Finally, its practicability and the correction of the simulation results were tested and verified through experiments on sample machines