电液双控负载敏感比例多路阀流量控制研究
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摘要
针对某连续运输设备行走速度不够,设备行走回路实际流量比设计流量低的问题,采用理论分析、AMESim仿真和实验验证三种方法对其进行了研究。首先结合液压元件原理和现场测试结果,从理论上分析了出现故障的原因,得出解决流量不足故障的理论依据;然后利用AMESim仿真软件对电液双控负载敏感比例多路阀控系统进行建模仿真,验证理论解决方案的正确性;最后通过实验对分析结果进行验证。结果显示,在电液双控负载敏感比例多路阀系统中,较长的先导管路沿程压力损失是造成该系统流量故障的主要原因。数字仿真和试验结果皆表明,增大长管道管径减小压损,或增加先导油源使长管道入口压力增大来补偿先导长管路造成的压力损失,将有效改善行走系统流量不足的问题。
Aimed at the problem that walking speed of a continuous transport equipment is not enough and actual flow rate of equipment walking circuit is lower than designed flow, method of theoretical analysis,AMESim simulation and experimental verification are used to study it.Firstly, combined with principle of hydraulic components and the results of field tests, the cause of failure is analyzed theoretically, and the theoretical basis for solving the problem of insufficient flow is obtained.Then, the simulation software AMESim is used to simulate an electro-hydraulic double-controlled load sensitive ratio multi-channel valve control system to verify correctness of the theoretical solution.Finally, the results are verified by experiments.It is found that long pressure loss along a pilot pipeline is the main reason for flow failure of the system in electro-hydraulic double-controlled load sensitive ratio multi-way valve system.Digital simulation and experimental results show that increasing diameter of long pipeline to reduce the pressure loss, or increasing inlet pressure of long pipeline to compensate for the pressure loss caused by the long pipeline, will effectively improve the problem of insufficient flow of the walking system.
Aimed at the problem that walking speed of a continuous transport equipment is not enough and actual flow rate of equipment walking circuit is lower than designed flow, method of theoretical analysis,AMESim simulation and experimental verification are used to study it.Firstly, combined with principle of hydraulic components and the results of field tests, the cause of failure is analyzed theoretically, and the theoretical basis for solving the problem of insufficient flow is obtained.Then, the simulation software AMESim is used to simulate an electro-hydraulic double-controlled load sensitive ratio multi-channel valve control system to verify correctness of the theoretical solution.Finally, the results are verified by experiments.It is found that long pressure loss along a pilot pipeline is the main reason for flow failure of the system in electro-hydraulic double-controlled load sensitive ratio multi-way valve system.Digital simulation and experimental results show that increasing diameter of long pipeline to reduce the pressure loss, or increasing inlet pressure of long pipeline to compensate for the pressure loss caused by the long pipeline, will effectively improve the problem of insufficient flow of the walking system.
引文
[1]刘昕辉,陈晋市.AMESim仿真技术在液压系统设计分析中的应用[J].液压与气动,2015,(11):1-6.LIU Xinhui,CHEN Jinshi.Application of AMESim in the Design and Analysis of Hydraulic System[J].Chinese Hydraulics&Pneumatics,2015,(11):1-6.
[2]刘宗宏,李亚,王征峥.负载敏感系统压力脉动控制方法的研究[J].液压与气动,2012,(6):40-42.LIU Zonghong,LI Ya,WANG Zhengzheng.Study on Pressure Pulsation Control Method for Load-sensing System[J].Chinese Hydraulics&Pneumatics,2012,(6):40-42.
[3]徐志刚.负载敏感泵控系统流量控制方法研究[J].液压与气动,2014,(12):51-54.XU Zhigang.Flow-control Method for Load-sensing Pump Hydraulic System[J].Chinese Hydraulics&Pneumatics,2014,(12):51-54.
[4]何志勇,何清华,李自光.液压脉动滤波器试验研究[J].液压与气动,2011,(7):101-103.HE Zhiyong,HE Qinghua,LI Ziguang.Experimental Study of Hydraulic Pulsation Attenuator[J].Chinese Hydraulics&Pneumatics,2011,(7):101-103.
[5]ROCCATELLO A,MANCO S,NERVEGNA N.Modeling a Variable Displacement Axial Piston Pump in a Multibody Simulation Environment[J].Journal of Dynamic Systems,2007,129(4):456-682.
[6]马冲,孔晓武.负载敏感液压泵稳定性仿真与参数优化[J].机电工程,2011,(5):548-552.MA Chong,KONG Xiaowu.Stability Simulation and Parameter Optimization of Load Sensing Pump[J].Journal of Mechanical&Electrical Engineering,2011,(5):548-552.
[7]宋海涛,吴晓光,殷新胜,等.负载反馈油管对负载敏感液压系统动态特性影响的探讨[J].机械设计与制造,2009,(1):200-201.SONG Haitao,WU Xiaoguang,YIN Xinsheng,et al.The Influence of the Feed Back Pipe to Load Sensing System Dynamic Characteristic[J].Machinery Design&Manufacture,2009,(1):200-201.
[8]付永领,祁晓野.AMESim系统建模和仿真[M].北京:北京航空航天大学出版社,2005.FU Yongling,QI Xiaoye.AMESim System Modeling and Simulation[M].Beijing:Beihang University Press,2005.
[2]刘宗宏,李亚,王征峥.负载敏感系统压力脉动控制方法的研究[J].液压与气动,2012,(6):40-42.LIU Zonghong,LI Ya,WANG Zhengzheng.Study on Pressure Pulsation Control Method for Load-sensing System[J].Chinese Hydraulics&Pneumatics,2012,(6):40-42.
[3]徐志刚.负载敏感泵控系统流量控制方法研究[J].液压与气动,2014,(12):51-54.XU Zhigang.Flow-control Method for Load-sensing Pump Hydraulic System[J].Chinese Hydraulics&Pneumatics,2014,(12):51-54.
[4]何志勇,何清华,李自光.液压脉动滤波器试验研究[J].液压与气动,2011,(7):101-103.HE Zhiyong,HE Qinghua,LI Ziguang.Experimental Study of Hydraulic Pulsation Attenuator[J].Chinese Hydraulics&Pneumatics,2011,(7):101-103.
[5]ROCCATELLO A,MANCO S,NERVEGNA N.Modeling a Variable Displacement Axial Piston Pump in a Multibody Simulation Environment[J].Journal of Dynamic Systems,2007,129(4):456-682.
[6]马冲,孔晓武.负载敏感液压泵稳定性仿真与参数优化[J].机电工程,2011,(5):548-552.MA Chong,KONG Xiaowu.Stability Simulation and Parameter Optimization of Load Sensing Pump[J].Journal of Mechanical&Electrical Engineering,2011,(5):548-552.
[7]宋海涛,吴晓光,殷新胜,等.负载反馈油管对负载敏感液压系统动态特性影响的探讨[J].机械设计与制造,2009,(1):200-201.SONG Haitao,WU Xiaoguang,YIN Xinsheng,et al.The Influence of the Feed Back Pipe to Load Sensing System Dynamic Characteristic[J].Machinery Design&Manufacture,2009,(1):200-201.
[8]付永领,祁晓野.AMESim系统建模和仿真[M].北京:北京航空航天大学出版社,2005.FU Yongling,QI Xiaoye.AMESim System Modeling and Simulation[M].Beijing:Beihang University Press,2005.