發(fā)布時(shí)間：2018-01-20 08:38

  本文關(guān)鍵詞： 流體動(dòng)力學(xué) 射流管伺服閥 瞬態(tài)流場(chǎng) 渦量 動(dòng)態(tài)響應(yīng)　出處：《儀器儀表學(xué)報(bào)》2017年07期 　論文類型：期刊論文

【摘要】：射流管電液伺服閥的噴嘴到接收孔間的流場(chǎng)較為復(fù)雜,尤其在射流管偏轉(zhuǎn)及閥芯運(yùn)動(dòng)的動(dòng)態(tài)情況下,會(huì)存在回流、漩渦等現(xiàn)象。以某型射流管電液伺服閥結(jié)構(gòu)為模型,結(jié)合射流管偏轉(zhuǎn)時(shí)的閥芯力平衡關(guān)系,得到閥芯的運(yùn)動(dòng)方程,應(yīng)用雷諾平均方程和標(biāo)準(zhǔn)兩方程模式的封閉方程,通過(guò)流體動(dòng)力學(xué)軟件FLUENT建立射流管伺服閥噴嘴到閥芯兩腔的三維可視化模型,仿真分析了噴嘴到接收孔的前置級(jí)瞬態(tài)流場(chǎng)及階躍響應(yīng)。仿真結(jié)果表明:接收孔中的渦量強(qiáng)度會(huì)影響射流管電液伺服閥的階躍響應(yīng),渦量強(qiáng)度越大、振蕩越大、階躍響應(yīng)越慢,并通過(guò)試驗(yàn)測(cè)試閥芯位移驗(yàn)證了數(shù)值計(jì)算的正確性,同時(shí)對(duì)比了不同接收孔間夾角的同時(shí)刻渦量及階躍響應(yīng),得到接收孔間夾角為45°的最優(yōu)設(shè)計(jì)。研究方法和結(jié)果對(duì)于提高射流管電液伺服閥的動(dòng)態(tài)響應(yīng)有重要參考價(jià)值。
[Abstract]:The flow field between the nozzle of the jet tube electro-hydraulic servo valve and the receiving hole is more complex, especially in the dynamic situation of the jet tube deflection and the movement of the valve core, there will be reflux. Taking the electro-hydraulic servo valve structure of a certain type of jet tube as a model and combining with the balance relation of the valve core force when the jet tube is deflecting, the motion equation of the valve core is obtained. Based on the closed equations of Reynolds mean equation and standard two-equation model, a three-dimensional visualization model of jet tube servo valve nozzle to valve core is established by using the fluid dynamics software FLUENT. The simulation results show that the vorticity intensity in the receiving hole will affect the step response of the electro-hydraulic servo valve, and the larger the vorticity intensity, the greater the oscillation. The slower the step response is, the correctness of the numerical calculation is verified by testing the valve core displacement, and the simultaneous vorticity and step response between different receiving holes are compared. The optimum design of 45 擄angle between the receiving holes is obtained. The research method and results have important reference value for improving the dynamic response of the electro-hydraulic servo valve of the jet pipe.
【作者單位】： 西北工業(yè)大學(xué)自動(dòng)化學(xué)院;
【基金】：航空基金(20150153002)項(xiàng)目資助
【分類號(hào)】：TH137.52
【正文快照】： 1引言電液伺服閥作為電液伺服控制的關(guān)鍵元件,不僅實(shí)現(xiàn)了電氣信號(hào)與液壓信號(hào)之間的轉(zhuǎn)換,而且能夠?qū)崿F(xiàn)功率放大,其性能會(huì)影響到整個(gè)系統(tǒng)的控制精度以及響應(yīng)速度。電液伺服閥按先導(dǎo)級(jí)不同主要分為滑閥式、噴嘴擋板式和射流管式,其中射流管伺服閥因其具有抗污染能力強(qiáng)、力矩馬達(dá)

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