| 重型拖拉机电液提升器多路换向阀仿真与试验 |
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| 引用本文： | 赵建军,朱忠祥,宋正河,毛恩荣,刘守荣,刘东铃.重型拖拉机电液提升器多路换向阀仿真与试验[J].农业机械学报,2014,45(S1):1-9. |
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| 作者姓名： | 赵建军 朱忠祥 宋正河 毛恩荣 刘守荣 刘东铃 |
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| 作者单位： | 中国农业大学农业部土壤-机器-植物系统技术重点实验室;中国农业大学农业部土壤-机器-植物系统技术重点实验室;中国农业大学农业部土壤-机器-植物系统技术重点实验室;中国农业大学农业部土壤-机器-植物系统技术重点实验室;中国农业大学农业部土壤-机器-植物系统技术重点实验室;中国农业大学农业部土壤-机器-植物系统技术重点实验室 |
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| 基金项目： | 国家高技术研究发展计划（863计划）资助项目（2013AA100307）和中央高校基本科研业务费专项资金资助项目（2014JD035） |
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| 摘 要： | 以多路换向阀为研究对象，分析了多路换向阀的工作原理和结构特点，利用压力-流量方程、孔道流量连续性方程及阀芯力平衡方程建立了多路换向阀的状态方程，并运用Matlab/Simulink软件，选择四阶龙格-库塔算法对其进行了动、静态性能仿真分析。基于闭心式负载传感液压系统试验平台，对多路换向阀进行了试验研究，试验结果表明：整个液压系统的压力损失在1.5MPa左右，负载压力阶跃变化时，多路换向阀可实现负载补偿功能；手动换向阀芯位移阶跃变化时，多路换向阀内压力冲击小、响应特性好；系统流量仅与多路换向阀调速节流口开度大小有关，不受负载变化影响，调速性能良好，满足重型拖拉机电液悬挂系统对多路换向阀的性能要求。
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| 关 键 词： | 重型拖拉机 多路换向阀 负载传感 仿真 试验 |
| 收稿时间： | 2014/7/30 0:00:00 |
Simulation and Experiment on Multi-directional Valve of Heavy Tractor Electro-hydraulic Hitch |
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| Zhao Jianjun,Zhu Zhongxiang,Song Zhenghe,Mao Enrong,Liu Shourong and Liu Dongling.Simulation and Experiment on Multi-directional Valve of Heavy Tractor Electro-hydraulic Hitch[J].Transactions of the Chinese Society of Agricultural Machinery,2014,45(S1):1-9. |
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| Authors: | Zhao Jianjun Zhu Zhongxiang Song Zhenghe Mao Enrong Liu Shourong and Liu Dongling |
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| Abstract: | Taking the multi--directional valve as the research object, this paper analyzed the working principle and structure features of the valve, and the state equations of the multi-directional valve were built by using the pressure-flow equation, flow continuity equation and valve spool force balance equation, then the static and dynamic characteristics of the valve were simulated by using the Fourth-Order Runge-Kutta algorithm in the software Matlab/Simulink. Based on the test platform of closed center load-sensing hydraulic system, experimental study of the multi-directional valve were conducted, results showed that pressure loss of the whole hydraulic system was about 1.5MPa. During step changes of the displacement of valve spool, the pressure shock of multi directional valve was small and the response characteristics were good. In addition, the function of load compensation can be realized under the step changes of load pressure, meanwhile, the system flow rate was only concerned with the opening size of the flow control orifice in the multi-directional control valve, so it had a good speed regulating performance without being affected by load variations. The multi-directional valve can meet the requirements of heavy tractor electro-hydraulic hitch. |
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| Keywords: | Heavy tractor Multi directional valve Load sensing Simulation Experiment |
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