Simulation Analysis of Slewing System for Hybrid Hydraulic Excavator

In order to recover the braking energy from braking process of slewing platform of hydraulic excavator,a hybrid hydraulic excavator energy recovery system was proposed in which accumulator was used to recover the braking energy.The differences of the principle of the slewing hydraulic system between the hybrid hydraulic excavator and the ordinary excavator were elaborated.The simulation model was built based on AMESim.Simulation results show that using the hybrid hydraulic excavator,the power loss of the hydraulic pumps and the pressure fluctuations of the hydraulic motors are reduced.In the energy saving aspect,the energy recovery efficiency of the accumulator can reach 70%,and the reuse efficiency of the hydraulic energy can reach 72.8%.So the system has high recovery efficiency and the energy saving purpose is achieved.