关键词: 液压挖掘机, 混合动力, 能量回收效率, 回转系统

Abstract:

In order to improve the fuel economy and reduce the emission of hydraulic excavators,a hydraulic hybrid excavator with the configuration based on the Common Pressure Rail is constructed. Then,by taking into consideration
the high energy consumption and great energy recovery potential of the swing system,a simulation model of the swing system is established with Simulation X,and the main factors affecting the energy recovery efficiency ( ERE) are analyzed. The results show that the proposed swing system effectively recovers the energy in breaking,and that the ERE increases with the hydraulic accumulator volume and the initial braking speed. In addition,some experiments are carried out to verify the conclusions drawn by simulation,finding that there exists a good accordance between the simulated and the experimental results.

Key words: hydraulic excavator, hybrid power, energy recovery efficiency, swing system