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兩級徑向流蜿蜒式磁流變閥結構設計與動態(tài)性能分析
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國家自然科學基金項目(51165005,、51475165、11462004)和江西省自然科學基金項目(20151BAB206035)


Structure Design and Dynamic Performance Analysis of Two-stage Radial Type Magnetorheological Valve with Meandering Fluid Flow Paths
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    摘要:

    設計了一種具有復雜液流通道結構的兩級徑向流蜿蜒式磁流變閥,其液流通道主要由2段圓環(huán)軸向流,、4段圓盤徑向流及3段中心小孔流組成,。闡述了兩級徑向流蜿蜒式磁流變閥的工作原理,,并推導了其壓降數(shù)學模型,。采用有限元法(FEM)對兩級徑向流蜿蜒式磁流變閥電磁場進行了建模仿真,,分析了磁流變閥壓降變化規(guī)律,,仿真結果表明加載電流為0.8A時壓降為5.81MPa。搭建了磁流變閥壓降性能及響應特性測試實驗臺,,對不同加載電流及不同模擬負載下的磁流變閥壓降性能進行了實驗分析,,結果表明加載電流為0.8A時壓降可達5.77MPa,與仿真結果基本相符,。同時,,對磁流變閥壓力響應時間進行了測試分析,實驗結果表明所設計的磁流變閥響應迅速,,響應時間在3~7ms之間,;并且響應上升時間比下降時間短;負載對響應時間沒有影響,;激勵電流越大,,響應越快。

    Abstract:

    Magnetorheological (MR) valve is a kind of smart control mechanism that using magnetorheologcial fluid as the working fluid. The advantages of regulating pressure drop and fast response time make the valve have a promising application prospects in the field of vibration attenuating system. Such as, it can be used as a bypass valve to control the MR damper, which can be formed a MR valve controlled cylinder mechanism to apply in the vehicle suspension system. A two-stage radial type MR valve with meandering fluid flow paths was developed, the fluid flow paths consisted of two annular fluid flow channels, four radial fluid flow channels and three centric pipe fluid flow channels. The working principle of the proposed MR valve was expounded in detail, and the mathematical model of pressure drop was also derived based on the Bingham model. The electromagnetic field model of the MR valve was built up by using the finite element method. The changes of pressure drop under different applied currents were analyzed, the simulation results showed that the pressure drop was 5.81MPa at applied current of 0.8A. At the same time, the experimental test rig was set up to investigate the pressure drop and response time of the proposed MR vale under different applied currents and different loading cases, the experimental results showed that the pressure drop was 5.77MPa at applied current of 0.8A, which was accorded with the simulation results. The response time was also tested, and the test results indicated that the response time was between 3ms and 7ms;the results also showed that the rising response time was shorter than the falling response time. Furthermore, the response time was independent of the loading cases, and the bigger the applied current of the excitation coil was, the faster the response time was.

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胡國良,鐘芳,張海云,徐明.兩級徑向流蜿蜒式磁流變閥結構設計與動態(tài)性能分析[J].農業(yè)機械學報,2016,47(10):376-382,389. Hu Guoliang, Zhong Fang, Zhang Haiyun, Xu Ming. Structure Design and Dynamic Performance Analysis of Two-stage Radial Type Magnetorheological Valve with Meandering Fluid Flow Paths[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(10):376-382,389.

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  • 收稿日期:2016-04-21
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  • 在線發(fā)布日期: 2016-10-10
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