行走工程机械液压混合动力技术

Hydraulic hybrid technology of moving construction machinery

对比了行走工程机械与公路车辆的作业特点,分析了行走工程机械的节能潜力。针对其频繁起停、往复运动的作业特点,提出液压混合动力系统的节能方案,设计了再生制动策略和能量利用策略,开发了混合动力装载机和混凝土搅拌车样车。试验结果表明,行走机械液压混合动力系统能够实现各种工作模式的合理切换,有效地回收和再利用整机的制动动能,降低燃油消耗,提高整机的动力性能。

The operating characteristic of moving construction machinery is analyzed and the energy saving potential is evaluated. In view of the characteristics that moving construction machinery frequently start and stop, different energy saving schemes are proposed. Regenerative braking strategy and energy reuse strategy are designed based on the advantage of high power density of hydraulic accumulator. Prototypes of hydraulic hybrid loader and hydraulic hybrid concrete mixer truck are developed. Experiment results show that the hydraulic hybrid system can effectively recover and reuse the braking energy. The control strategies reasonably switch among various operation modes, reduce fuel consumption and improve the dynamic performance of the machine.