液电混合装载机行走驱动系统动能回收与再利用

Kinetic Energy Recovery and Reuse of Traveling Drive System of Hybrid Hydraulic-electric Loader

装载机装卸作业过程中,行走系统频繁启制动,带来系统能耗高且驱动电机装机功率大的问题。提出一种液电混合装载机行走节能系统,阐述了其工作原理并设计了液压再生制动策略和能量辅助启动策略以协调电机和液压泵/马达的动力总成部件,在Simulation X中建立了仿真模型。结果表明,此方案有效回收和再利用了装载机行走的制动动能,驱动电机的峰值功率降低约39%,一次完整作业能量消耗减少约29%。

During the loading and unloading operation of a loader,the frequent starting and braking of the travel system brings the problem of high system energy consumption and high installed power of the drive motor.In this paper,we propose an energy-saving system for hybrid loader travel,describe its working principle and design a hydraulic regenerative braking strategy and an energy-assisted starting strategy to coordinate the powertrain components of electric motor and hydraulic pump/motor.Simulation models are built in Simulation X.The simulation results show that this scheme effectively recovers and reuses the braking kinetic energy of the loader walking,reduces the peak power of the drive motor by about 39%,and reduces the energy consumption of a complete operation by about 29%.