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大功率拖拉機(jī)電液提升器比例提升閥設(shè)計
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“十一五”國家科技支撐計劃資助項目（2009BADB5B01）和“十二五”國家科技支撐計劃資助項目（2011BAD20B02）


Design of Proportional Raise Valve in Electro-hydraulic Lifting Mechanism of Big-power Tractor
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    摘要:

    針對大功率拖拉機(jī)電液提升器，設(shè)計了比例提升閥，對4種不同型式節(jié)流口的流量特性進(jìn)行了對比。基于狀態(tài)空間法，建立比例提升閥的動態(tài)數(shù)學(xué)模型及仿真模型，在Matlab/Simulink中進(jìn)行仿真及參數(shù)優(yōu)化設(shè)計，并進(jìn)行了室內(nèi)試驗。結(jié)果表明，采用半圓形節(jié)流口的閥芯行程短且具有良好的小流量特性；經(jīng)參數(shù)優(yōu)化之后，比例提升閥控制電流與流量曲線線性度決定系數(shù)為0.9986，動態(tài)階躍響應(yīng)超調(diào)量為6.25%，調(diào)整時間為0.3 s。

    Abstract:

    A proportional raise valve was designed to meet the requirement of electro-hydraulic rockshaft on big-power tractors. The flow rate characteristics of four types of regulator orifice were analyzed. The mathematical model of the valve was established based on state space method, then the stable performance and dynamic performance of the valve were simulated by using Matlab/Simulink. An indoor test-bed was built to test the designed proportional raise valve. The results showed that the valve core with half-round regulator orifice had shorter travel and better low-flow rate characteristics. The coefficient of determination of the linearity of flow rate curve due to the control current change was 0.9986. The overshoot of step response was 6.25% and the set up time was 0.3 s.

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李明生,朱忠祥,毛恩榮,宋正河,謝斌,李長林.大功率拖拉機(jī)電液提升器比例提升閥設(shè)計[J].農(nóng)業(yè)機(jī)械學(xué)報,2012,43(10):31-35,89. Li Mingsheng, Zhu Zhongxiang,Mao Enrong, Song Zhenghe, Xie Bin, Li Changlin. Design of Proportional Raise Valve in Electro-hydraulic Lifting Mechanism of Big-power Tractor[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(10):31-35,89.

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  • 在線發(fā)布日期: 2012-10-19
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