正流量控制挖掘机液压系统压力损失分析  

Analysis of Pressure Loss in Hydraulic System of Excavator with Positive Flow Control

作　　者：宋佳 尹满义 孟俊晓 王维福 孔祥东[1,3,4] 艾超[1,3,4] SONG Jia;YIN Man-yi;MENG Jun-xiao;WANG Wei-fu;KONG Xiang-dong;AI Chao(School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei 066004;SANY Heavy Machinery Co. , Ltd. , Kunshan, Jiangsu 215300;Hebei Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao, Hebei 066004;Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University)

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]三一重机有限公司,江苏昆山215300 [3]燕山大学河北省重型机械流体动力传输与控制实验室,河北秦皇岛066004 [4]先进锻压成型技术与科学教育部重点实验室(燕山大学),河北秦皇岛066004

出　　处：《液压与气动》2020年第6期12-21,共10页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51775476);河北省自然科学基金优秀青年基金(E2018203388)。

摘　　要：以大型正流量控制挖掘机液压系统为研究对象,理论分析液压系统压力损失,建立机电液联合仿真模型,重点分析挖掘机典型工况下整机液压系统压力损失,探究出了不同动作整机压力损失具体数值以及压力损失分布情况。仿真结果表明:由于斗杆挖掘多路阀具有回油再生功能,管道中流量最大,达到910 L/min,使得斗杆挖掘液压系统压力损失较高,泵1侧进油路压力损失为3.31 MPa,泵2侧进油路压力损失为3.91 MPa。通过实验验证了仿真结果的准确性,为正流量控制挖掘机能量损失研究和性能提升奠定基础,提高挖掘机研发效率。Taking hydraulic system of large positive flow control excavator as the research object,the pressure loss of hydraulic system is analyzed theoretically,and the electro-mechanical-hydraulic model is established.This paper focuses on the pressure loss of excavator hydraulic system under typical working conditions,and explores the specific value and distribution of the pressure loss under different working conditions.Results show that the dipper handle excavation multi-way valve has the function of oil return and regeneration,and the flow rate in the pipeline is the maximum,reaching up to 910 L/min.Furthermore,the pressure loss of pump 1 side is 33.1 MPa and the pressure loss of pump 2 side is 3.91 MPa.The accuracy of simulation results is verified by experiments,which lays a foundation for the research and performance improvement of energy loss of positive flow control excavator,and improves the efficiency of excavator research and development.

关 键 词：正流量控制 液压系统仿真 联合仿真 压力损失 

分 类 号：TH137[机械工程—机械制造及自动化]