基于电气式能量回收的液压挖掘机转台节能驱动系统

发布时间：2019-01-27 19:43

【摘要】：为了使液压挖掘机达到节能的目的,考虑到混合动力挖掘机具有电量储存单元的特点,针对传统挖掘机转台加速和制动过程中的溢流损耗,提出了一种基于液压马达-发电机的溢流损耗能量回收的转台节能驱动系统。分析了一种基于先导操作手柄压力和回转马达进出口压力的转台工作模式辨别准则。考虑到大惯性负载引起的反转问题和转台冲击,提出了一种基于转台转速的回收马达进口压力动态调整方法以及防反转控制方法。最后建立了多种驱动系统的数学模型,并进行了节能效果和操控性能的仿真研究。结果表明:该系统不仅可以实现转台制动动能的回收,而且可回收转台加速过程中的溢流损耗,同时在防反转控制和防止转台加速度冲击方面均具有良好的控制效果;相对于原驱动系统,新型驱动系统节能约38%。
[Abstract]:In order to save energy for hydraulic excavator, considering the characteristics of electric storage unit in hybrid excavator, the overflow loss during acceleration and braking of rotary table of traditional excavator is discussed. An energy-saving drive system for turntable based on hydraulic motor-generator overflow loss energy recovery is proposed. In this paper, a turntable operating mode discrimination criterion based on pilot operating handle pressure and rotary motor inlet and outlet pressure is analyzed. Considering the inversion problem caused by large inertial load and the impact of turntable, a method of dynamic adjustment of inlet pressure and anti-inversion control method of recovery motor based on turntable speed is proposed. Finally, the mathematical models of various driving systems are established, and the simulation of energy saving effect and control performance is carried out. The results show that the system can not only recover the braking kinetic energy of the turntable, but also recover the overflow loss in the acceleration process of the turntable. At the same time, the system has good control effect in the aspects of anti-inversion control and preventing the acceleration impact of the turntable. Compared with the original drive system, the new drive system about 38 energy saving.
【作者单位】：华侨大学机电及自动化学院;浙江大学流体动力与机电系统国家重点实验室;
【基金】：国家高技术研究发展计划(“八六三”计划)重点项目(2010AA044401) 国家自然科学基金项目(51205140) 福建省高校产学合作科技重大项目(2013H6015) 流体动力与机电系统国家重点实验室开放基金项目(GZKF-201111) 华侨大学中青年教师科研提升计划项目(ZQN-YX201) 华侨大学科研启动费项目(11BS409)
【分类号】：TU621

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