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| 挖掘机正流量泵控液压系统的特性分析 | |
| 引用本文： | 贾文华,殷晨波,曹东辉,陈克雷.挖掘机正流量泵控液压系统的特性分析[J].南京工业大学学报(自然科学版),2011,33(6):98-101. |
| 作者姓名： | 贾文华 殷晨波 曹东辉 陈克雷 |
| 作者单位： | 1. 南京工业大学车辆与工程机械研究所,江苏南京210009;南京工程学院机械工程学院,江苏南京211167; 2. 南京工业大学车辆与工程机械研究所,江苏南京,210009 3. 三一重机有限公司,江苏昆山,215300 |
| 摘 要： | 采用泵控挖掘机液压系统特性分析方法,在分析泵的输出特性的基础上,给出确定先导压力信号和控制泵排量的方法,并对泵的输出特性进行了仿真和实验研究。结果表明:正流量控制下,泵的排量由执行器流量需求和油泵的p-Q曲线动态实时调节,系统具有良好的负载流量适应性和负载敏感性,其液压系统中不存在负压,只有约0.5 MPa的背压,回油功率损失几乎为0。 |
| 关 键 词： | 挖掘机 液压系统 正流量 |
Analysis on positive flow pump control system of hydraulic excavator |
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| JIA Wenhua,YIN Chenbo,CAO Donghui,CHEN Kelei.Analysis on positive flow pump control system of hydraulic excavator[J].Journal of Nanjing University of Technology,2011,33(6):98-101. | |
| Authors: | JIA Wenhua YIN Chenbo CAO Donghui CHEN Kelei |
| Institution: | 1.College of Mechanical and Power Engineering,Nanjing University of Technology,Nanjing 210009,China; 2.College of Mechanical Engineering,Nanjing Institute of Technology,Nanjing 211167,China; 3.SANY Co.,Ltd.,Kunshan 215300,China) |
| Abstract: | Some problems were studied for the positive flow control of pump system of hydraulic excavator.Based on the analysis of pump output characteristics,the control method for pilot pressure and the pump displacement was given.The pump output characteristics were investigated by simulation and experiment.Results showed that flow was adjusted by flow required by actuator and the p-Q curve of main pump.For the positive system,the excavator had good load flow adaptability and load sensitivity.The power loss of returning oil path was almost zero.In the returning path,the negative pressure was only 0.5 MPa for the positive system. |
| Keywords: | excavator hydraulic system positive flow |
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