挖掘机LUDV液压系统的能量流研究  

Energy Flow of a Hydraulic Excavator with Load Independent Flow Distribution

作　　者：张树忠[1] 邓斌[1] 曹树森[1] 张弓[1] 

机构地区：[1]西南交通大学机械学院,成都610031

出　　处：《机械科学与技术》2010年第1期94-99,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家"863"项目(2006AA09Z226)资助

摘　　要：基于挖掘机液压系统效率低的现状,以某型LUDV液压挖掘机为研究对象,建立了工作装置多刚体动力学、液压系统以及系统能量损耗模型。通过仿真研究,得出该挖掘机在标准工作循环中各个元件(回转马达、多路阀、管路和各液压缸)和子系统的能量传输比和损耗比,揭示了在不同动作时主要的能量损耗源,并计算出各个元件在该工作循环中潜在的可回收能量。最后,提出采用泵控系统或应用液压变压器的恒压网络系统取代LUDV系统,对动臂、斗杆以及转台的势能和制动能进行回收是降低系统能耗的有效途径。Aiming at the low efficiency of an excavator hydraulic system, multi-body dynamics, hydraulic system and system energy loss model is developed for the a LUDV （load independent flow distribution system） hydraulic excavator. Power transmission and dissipation is calculated for each component and subsystem, including main control valve, hydraulic motor, cylinders and transmission lines. The simulation results show the amount of dissipated energy, indicating the major loss sources during various operations. Furthermore, the potential recoverable energy during the working cycle is calculated. Analysis results show that energy utilization in LUDV excavator hydraulic systems can be improved by replacing the pump control system or constant pressure rail with hydraulic transformers, and by recovering the potential and braking energy of boom, stick and swing mechanism.

关 键 词：液压挖掘机 LUDV 能量流 损耗 

分 类 号：TH137.3[机械工程—机械制造及自动化]