| 拖拉机液压底盘液控比例流量阀设计与试验 |
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| 引用本文： | 李明生,叶进,谢斌,杨仕,曾百功,柳剑.拖拉机液压底盘液控比例流量阀设计与试验[J].农业机械学报,2018,49(4):397-403. |
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| 作者姓名： | 李明生 叶进 谢斌 杨仕 曾百功 柳剑 |
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| 作者单位： | 西南大学工程技术学院;中国农业大学工学院; |
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| 基金项目： | 国家重点研发计划项目（2016YFD0701001）和中央高校基本科研业务费专项资金重点项目（XDJK2016B007） |
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| 摘 要： | 为提高液压驱动拖拉机行驶时的调速稳定性和低速行驶时的平顺性,设计了一种液控比例流量阀。该阀设计有压力补偿功能,以消除压力波动对流量的影响,提高了流量控制精度。通过传统计算和仿真验证的方法对该阀进行结构参数设计。基于阀口迁移理论设计了阀芯节流槽,以增大调速区间。仿真结果表明:该阀控制流量范围为0~5.67×10-3m3/s,流量变化平稳,流量调速控制压力区占总控制压力区间的68.4%;压力补偿阀控制补偿压力在0.3~0.7 MPa的范围内,可使比例换向阀流量稳定。试验结果表明:拖拉机空载、发动机怠速工况时,流量调速控制压力区占总控制压力区间的45%;拖拉机空载、发动机高速工况时,流量调速控制压力区占总控制压力区间的62%;拖拉机重载、发动机怠速工况时,流量调速控制压力区占总控制压力区间的49.5%;拖拉机重载、发动机高速工况时,流量调速控制压力区占总控制压力区间的48.5%;当控制压力为0.78 MPa时,液控比例阀流量稳定在8.33×10-5m3/s;当控制压力为0.84 MPa时,液控比例阀流量稳定在2.5×10-4m3/s。
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| 关 键 词： | 拖拉机 液控比例流量阀 节流槽 试验 |
| 收稿时间： | 2017/11/4 0:00:00 |
Design and Test of Hydraulic Proportional Flow Valve for Hydraulic Chassis in Tractor |
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| LI Mingsheng,YE Jin,XIE Bin,YANG Shi,ZENG Baigong and LIU Jian.Design and Test of Hydraulic Proportional Flow Valve for Hydraulic Chassis in Tractor[J].Transactions of the Chinese Society of Agricultural Machinery,2018,49(4):397-403. |
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| Authors: | LI Mingsheng YE Jin XIE Bin YANG Shi ZENG Baigong and LIU Jian |
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| Institution: | Southwest University,Southwest University,China Agricultural University,Southwest University,Southwest University and Southwest University |
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| Abstract: | In order to improve the speed stability of the hydraulic drive tractor and the ride comfort at low speed, a hydraulic proportional flow valve was designed. Pressure compensation function was used to eliminate the iMPact of pressure fluctuations on the flow. The structural parameters of the valve were designed by the method of traditional calculation and simulation. The simulation results showed that the flow rate range was 0~5.67×10-3m3/s and the flow rate was changed smoothly with the change of control pressure;the flow rate control pressure zone accounted for 68.4% of the total control pressure range;the range of the compensation pressure was 0.3~0.7MPa. The test results showed that the flow rate control pressure zone accounted for 45% of the total control pressure range when tractor was no-load and at idle engine speed;the flow rate control pressure zone accounted for 62% of the total control pressure range when tractor was no-load and at high engine speed;the flow rate control pressure zone accounted for 49.5% of the total control pressure range when tractor was high-duty and at idle engine speed;the flow rate control pressure zone accounted for 48.5% of the total control pressure range when tractor was high-duty and at high engine speed;the flow rate of the valve was stabilized at 8.33×10-5m3/s when the control pressure was set to be 0.78MPa and it was stabilized at 2.5×10-4m3/s when the control pressure was set to be 0.84MPa. |
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| Keywords: | tractor hydraulic proportional flow valve throttle test |
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