本文選題：電液比例 + 軸向柱塞變量泵��； 參考：《南華大學(xué)》2011年碩士論文

【摘要】：電液比例控制技術(shù)是近年發(fā)展起來(lái)的一種新型液壓控制技術(shù),該技術(shù)主要利用電信號(hào)控制液壓信號(hào),使輸出與輸入成正比,可以方便的對(duì)系統(tǒng)的壓力和流量進(jìn)行高精度控制。 電液比例變量柱塞泵具有結(jié)構(gòu)緊湊、簡(jiǎn)化系統(tǒng)設(shè)計(jì)和便于實(shí)現(xiàn)自動(dòng)控制,眾多國(guó)內(nèi)外企業(yè)都積極對(duì)電液比例軸向變量泵的開(kāi)的和推廣,它的發(fā)展使液壓系統(tǒng)向高壓、高效率、高功率密度方向邁進(jìn)。為了節(jié)約成本,縮短研制周期、分析相關(guān)的技術(shù)難題,可采用計(jì)算機(jī)進(jìn)行仿真,為泵的仿真提供理論依據(jù)和參考。電液比例泵是液壓系統(tǒng)的動(dòng)力源,變量柱塞泵可以通過(guò)改變泵的排量與負(fù)載所需流量相適應(yīng),從而實(shí)現(xiàn)節(jié)能的目的。對(duì)變量柱塞泵的壓力進(jìn)行控制,使其與外負(fù)載相適應(yīng),最終實(shí)現(xiàn)流量控制。對(duì)變量軸塞泵的壓力——流量實(shí)現(xiàn)雙比例控制,可以更好實(shí)現(xiàn)多級(jí)壓力——流量液壓系統(tǒng)的節(jié)能要求。 本文利用流體力學(xué)方程,對(duì)閉環(huán)電液比例柱塞泵中的各元件建立單獨(dú)的數(shù)學(xué)模型。在壓力控制與流量控制狀態(tài)下,對(duì)單個(gè)模型進(jìn)行組合簡(jiǎn)化并得出傳遞函數(shù)框圖,分別建立壓力控制子系統(tǒng)和流量控制子系統(tǒng),最后在Simulink中進(jìn)行仿真,得出其壓力控制與流量控制的動(dòng)態(tài)曲線(xiàn)。 影響系統(tǒng)壓力的主要元件有壓力閥及液阻R4。壓力閥的結(jié)構(gòu)參數(shù)中關(guān)系較大的有先導(dǎo)閥直徑、彈簧剛度。通過(guò)研究液阻大小、壓力閥直徑、彈簧剛度對(duì)壓力響應(yīng)和流量響應(yīng)的影響,可以得到改善泵的壓力動(dòng)態(tài)響應(yīng)和穩(wěn)態(tài)響應(yīng)。影響系統(tǒng)流量的主要元件有節(jié)流閥和泵。節(jié)流閥的開(kāi)度大小,閥口形狀,液阻大小都會(huì)對(duì)泵的系統(tǒng)壓力產(chǎn)生影響。通過(guò)仿真可以了解復(fù)合控制泵在一些特定狀態(tài)下的動(dòng)態(tài)特性,為電液比例泵的設(shè)計(jì)和改進(jìn)提供理論依據(jù)。
[Abstract]:Electro-hydraulic proportional control (EHPC) is a new hydraulic control technology developed in recent years. It mainly uses electric signals to control hydraulic signals, which makes the output proportional to the input, and can easily control the pressure and flow rate of the system with high precision. Electro-hydraulic proportional variable piston pump has compact structure, simplifies system design and facilitates automatic control. Many enterprises at home and abroad are active in opening and popularizing electro-hydraulic proportional axial variable pump. Its development makes hydraulic system high pressure and high efficiency. Move in the direction of high power density. In order to save the cost, shorten the development period and analyze the related technical problems, computer simulation can be used to provide theoretical basis and reference for pump simulation. The electro-hydraulic proportional pump is the power source of the hydraulic system. The variable piston pump can adapt the displacement of the pump to the required flow rate of the load so as to achieve the purpose of energy saving. The pressure of variable piston pump is controlled to fit the external load and the flow control is realized. The double proportional control of the pressure and flow of the variable axial plug pump can better meet the energy saving requirements of the multistage pressure-flow hydraulic system. In this paper, a separate mathematical model of the components in the closed loop electro-hydraulic proportional piston pump is established by using the hydrodynamic equation. Under the condition of pressure control and flow control, the single model is simplified and the block diagram of transfer function is obtained. The pressure control subsystem and the flow control subsystem are established respectively. Finally, the simulation is carried out in Simulink. The dynamic curves of pressure control and flow control are obtained. The main components affecting system pressure are pressure valve and liquid resistance R 4. Among the structural parameters of pressure valve, there are pilot valve diameter and spring stiffness. By studying the effects of hydraulic resistance, pressure valve diameter and spring stiffness on pressure response and flow response, the pressure dynamic response and steady state response of the pump can be improved. The main components affecting system flow are throttle valves and pumps. Throttle valve opening size, valve shape, liquid resistance will affect the pump system pressure. The dynamic characteristics of the compound control pump under some special conditions can be understood by simulation, which provides a theoretical basis for the design and improvement of the electro-hydraulic proportional pump.
【學(xué)位授予單位】：南華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類(lèi)號(hào)】：TH137.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 那焱青,那成烈,李書(shū)澤,王崢嶸;軸向柱塞泵配流盤(pán)液壓支承力的計(jì)算[J];甘肅工業(yè)大學(xué)學(xué)報(bào);2003年02期

2 鄭淑麗;二通插裝閥及其液壓系統(tǒng)實(shí)例分析[J];山東科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2003年02期

3 荊琴,楊國(guó)來(lái);電液比例徑向柱塞泵控制系統(tǒng)用在注塑機(jī)上的節(jié)能效果分析[J];液壓與氣動(dòng);2004年10期

4 徐繩武;PCY恒壓變量泵的改進(jìn)和發(fā)展[J];液壓氣動(dòng)與密封;2005年01期

5 張力鈞,黃人豪,胡偉民,濮鳳根;二通插裝閥統(tǒng)一建模方法的研究[J];液壓氣動(dòng)與密封;2003年03期

相關(guān)博士學(xué)位論文 前1條

1 鄧斌;水壓軸向柱塞泵的特性研究與分析[D];西南交通大學(xué);2004年

相關(guān)碩士學(xué)位論文 前5條

1 張紅偉;基于現(xiàn)代設(shè)計(jì)方法的軸向柱塞變量泵柱塞的研究[D];重慶大學(xué);2003年

2 尹文波;可壓縮流體工作介質(zhì)軸向柱塞泵配流及瞬時(shí)流量仿真研究[D];蘭州理工大學(xué);2003年

3 楊智煒;軸向柱塞泵虛擬樣機(jī)仿真技術(shù)研究[D];浙江大學(xué);2006年

4 賴(lài)士興;精密注射裝置的研究[D];北京化工大學(xué);2007年

5 范卓立;基于虛擬樣機(jī)技術(shù)的軸向柱塞泵運(yùn)動(dòng)及動(dòng)力特性仿真分析[D];燕山大學(xué);2007年

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