發(fā)布時(shí)間：2018-07-25 20:12

【摘要】：液壓電機(jī)泵是將電動(dòng)機(jī)、液壓泵及孔板離心泵融合為一體的新型液壓動(dòng)力單元,具有結(jié)構(gòu)緊湊、靜音、效率高、無外泄漏等優(yōu)點(diǎn),液壓電機(jī)泵已經(jīng)成為液壓動(dòng)力單元的一個(gè)重要的發(fā)展方向。本文主要是對(duì)液壓電機(jī)泵內(nèi)部流動(dòng)問題開展研究,采用理論分析、數(shù)值仿真與試驗(yàn)相結(jié)合的方法,對(duì)液壓電機(jī)泵中孔板離心泵的增壓作用進(jìn)行深入分析。應(yīng)用Fluent流場(chǎng)仿真軟件對(duì)不同進(jìn)油方式下的液壓電機(jī)泵主泵吸油流場(chǎng)進(jìn)行仿真計(jì)算,研究不同進(jìn)油方式對(duì)孔板離心泵增壓作用的影響。并在此基礎(chǔ)上對(duì)液壓電機(jī)泵內(nèi)部流道進(jìn)行了進(jìn)一步的優(yōu)化,同時(shí)對(duì)不同轉(zhuǎn)速條件下的主泵吸油流場(chǎng)進(jìn)行數(shù)值計(jì)算,獲得孔板離心泵增壓作用隨轉(zhuǎn)速變化規(guī)律。搭建液壓電機(jī)泵樣機(jī)測(cè)試系統(tǒng),對(duì)液壓電機(jī)泵的流量、轉(zhuǎn)速、容積效率、噪聲等進(jìn)行測(cè)量,并與同規(guī)格電機(jī)油泵組實(shí)驗(yàn)數(shù)據(jù)進(jìn)行對(duì)比分析。本論文對(duì)液壓電機(jī)泵吸油流道的設(shè)計(jì)具有重要的參考價(jià)值,并對(duì)研制高效液壓電機(jī)泵與改善液壓泵自吸性能具有普適的指導(dǎo)意義。 論文的主要內(nèi)容如下： 第1章,闡述了本課題的研究背景及意義；系統(tǒng)介紹了液壓電機(jī)泵的研究及發(fā)展概況,概括并總結(jié)了本論文的主要研究?jī)?nèi)容。 第2章,對(duì)液壓電機(jī)泵的內(nèi)部結(jié)構(gòu)進(jìn)行了說明,并詳細(xì)闡述了液壓電機(jī)泵的工作原理；應(yīng)用Fluent流場(chǎng)仿真軟件,對(duì)不同進(jìn)油方式下的液壓電機(jī)泵主泵吸油流場(chǎng)進(jìn)行仿真計(jì)算,研究不同進(jìn)油方式對(duì)孔板離心泵增壓作用的影響。并在此基礎(chǔ)上對(duì)液壓電機(jī)泵內(nèi)部流道進(jìn)行了進(jìn)一步的優(yōu)化,對(duì)修改后的主泵吸油流場(chǎng)進(jìn)行仿真計(jì)算,結(jié)果表明：改進(jìn)后的孔板離心泵增壓作用較之改進(jìn)前有了顯著的提升,能夠有效提高主泵吸油性能；簡(jiǎn)化了液壓電機(jī)泵進(jìn)油結(jié)構(gòu),有利于工作過程中的散熱。 第3章,通過流場(chǎng)仿真軟件Fluent對(duì)修改后的液壓電機(jī)泵主泵吸油流場(chǎng)進(jìn)行仿真計(jì)算,獲得主泵吸油流場(chǎng)在不同轉(zhuǎn)速下的總壓分布云圖并進(jìn)行對(duì)比分析,得到如下結(jié)論：隨著轉(zhuǎn)速的不斷升高,主泵吸油流場(chǎng)中的吸油流道負(fù)壓不斷增大；孔板離心泵的增壓作用隨轉(zhuǎn)速的升高而增強(qiáng)；孔板離心泵出口(主泵吸油腔進(jìn)口)總壓分布并不均勻,出口總壓的最大值可以作為評(píng)定孔板離心泵提升主泵吸油性能的指標(biāo),總壓最大值隨著轉(zhuǎn)速的升高而升高,呈現(xiàn)近似線性的變化規(guī)律。孔板離心泵的增壓效果隨轉(zhuǎn)速的升高而增強(qiáng),為主泵充分供油,提高主泵的吸油性能。 第4章,搭建了液壓電機(jī)泵樣機(jī)性能試驗(yàn)系統(tǒng),并應(yīng)用該系統(tǒng)對(duì)液壓電機(jī)泵與同等規(guī)格電機(jī)油泵組進(jìn)行對(duì)比試驗(yàn),獲得了流量、轉(zhuǎn)速、容積效率、壓力、噪聲等實(shí)驗(yàn)數(shù)據(jù)。通過試驗(yàn)可以得知：孔板離心泵可明顯地促進(jìn)主泵充分吸油,液壓電機(jī)泵與同規(guī)格電機(jī)油泵組相比容積效率高1.25%左右；當(dāng)轉(zhuǎn)速低于1395r/min后,液壓電機(jī)泵容積效率開始低于電機(jī)油泵組,會(huì)對(duì)主泵吸油產(chǎn)生不利影響,壓力上升至22MPa時(shí),液壓電機(jī)泵容積效率相對(duì)降低2.7%。結(jié)合流場(chǎng)仿真計(jì)算結(jié)果,最終總結(jié)出了孔板離心泵增壓效應(yīng)的確切含義。液壓電機(jī)泵噪聲聲級(jí)明顯比電機(jī)油泵組低,當(dāng)輸出壓力上升至16MPa時(shí),液壓電機(jī)泵噪聲聲級(jí)低13.5dB,噪聲頻譜以低頻噪聲為主,孔板離心泵為主泵充分供油,有效減少了因吸油不足而產(chǎn)生的氣穴噪聲。 最后,對(duì)本論文的研究工作和成果進(jìn)行了總結(jié),并展望了下一步的研究工作。
[Abstract]:The hydraulic motor pump is a new type of hydraulic power unit which combines the motor, the hydraulic pump and the hole plate centrifugal pump. It has the advantages of compact structure, quiet, high efficiency, no leakage and so on. The hydraulic motor pump has become an important development direction of the hydraulic power unit. This paper mainly studies the internal flow problem of the hydraulic motor pump. Using the method of theoretical analysis, numerical simulation and experiment, the pressurization of the hole plate centrifugal pump in the hydraulic motor pump is analyzed in depth. The simulation calculation of the oil absorption flow field of the main pump of the hydraulic motor pump under different oil intake mode is carried out by using the Fluent flow field simulation software, and the effect of the different oil intake mode on the turbocharging of the hole plate centrifugal pump is studied. On the basis of this, the internal flow path of the hydraulic motor pump is further optimized. At the same time, the flow field of the main pump in the main pump under different rotational speeds is calculated, and the law of the pressure change with the speed of the hole plate centrifugal pump is obtained. The test system of the hydraulic motor pump prototype is built, and the flow, speed, volume efficiency and noise of the hydraulic motor pump are set up. This paper has an important reference value for the design of the oil suction flow channel of the hydraulic motor pump, and has the universal guiding significance for the development of the high efficiency hydraulic motor pump and the improvement of the self-priming performance of the hydraulic pump.
The main contents of the paper are as follows:
In the first chapter, the background and significance of the research are expounded, the research and development of the hydraulic motor pump are introduced systematically, and the main contents of this paper are summarized and summarized.
In the second chapter, the internal structure of the hydraulic motor pump is explained, and the working principle of the hydraulic motor pump is expounded in detail. The simulation software of the Fluent flow field simulation software is used to simulate the oil absorption flow field of the main pump of the hydraulic motor pump under different oil intake modes, and the influence of different oil intake modes on the turbocharging of the orifice centrifugal pump is studied. The internal flow path of the hydraulic motor pump is further optimized. The simulation calculation of the oil absorption flow field of the modified main pump is carried out. The result shows that the booster effect of the improved hole plate centrifugal pump has a remarkable improvement compared with that before the improvement. It can effectively improve the oil absorption performance of the main pump, and simplify the oil intake structure of the hydraulic motor pump, which is beneficial to the work. Heat dissipation in the course.
The third chapter, through the flow field simulation software Fluent, simulated the oil absorption flow field of the modified hydraulic motor pump main pump, and obtained the total pressure distribution cloud chart of the main pump oil absorption flow field at different rotational speeds and carried on the contrast analysis. The following conclusion is drawn: with the continuous increase of the speed, the suction flow channel negative pressure in the oil suction flow field of the main pump increases continuously; The supercharging effect of the plate centrifugal pump increases with the speed. The total pressure distribution of the outlet of the orifice plate centrifugal pump (the inlet of the main pump suction chamber) is not uniform. The maximum value of the total pressure of the outlet can be used as an index to evaluate the oil absorption performance of the main pump, and the maximum total pressure increases with the increase of the speed, and presents an approximate linear change rule. The supercharging effect of the orifice centrifugal pump increases with the increase of speed, and the main pump provides sufficient oil to improve the oil absorption performance of the main pump.
In the fourth chapter, the performance test system of the hydraulic motor pump prototype is built, and the experimental data of the flow, speed, volume efficiency, pressure and noise are obtained by using the system to compare the hydraulic motor pump with the same specifications of the motor oil pump, and the test can be found that the hole plate centrifugal pump can obviously promote the full oil absorption of the main pump and the hydraulic motor. The volume efficiency of the pump is about 1.25% higher than that of the same size motor oil pump group. When the speed is lower than 1395r/min, the volume efficiency of the hydraulic motor pump begins to be lower than the motor oil pump group. It will have a negative effect on the oil absorption of the main pump. When the pressure rises to 22MPa, the volume efficiency of the hydraulic motor pump decreases relative to the simulation result of the flow field of 2.7%. combined with the simulation result. Finally, the results are summed up. The noise level of the hydraulic motor pump is obviously lower than that of the motor oil pump group. When the output pressure rises to 16MPa, the noise level of the hydraulic motor pump is low 13.5dB, the noise spectrum is mainly low frequency noise, and the hole plate centrifugal pump is the main pump, which reduces the cavitation noise caused by the lack of oil absorption.
Finally, the research work and achievements of this thesis are summarized, and the next research work is prospected.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH137.51

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 高殿榮;劉金慧;溫茂森;;軸向柱塞液壓電機(jī)泵內(nèi)部流場(chǎng)的分析[J];燕山大學(xué)學(xué)報(bào);2010年06期

2 ;Exploitation of Renewable Energy—A Strategic Choice for Sustainable Development of Power Industry[J];Electricity;2005年01期

3 高殿榮;王有杰;陸向輝;李徐佳;喬海軍;;基于CFD技術(shù)的新型軸向柱塞液壓電機(jī)泵流場(chǎng)計(jì)算與分析[J];機(jī)床與液壓;2010年05期

4 冀宏;張立升;王崢嶸;王金林;;電動(dòng)液壓動(dòng)力單元的一體化演變[J];機(jī)床與液壓;2011年19期

5 付永領(lǐng);李祝鋒;安高成;張猛;齊海濤;薛晶;;電液泵發(fā)展現(xiàn)狀與關(guān)鍵技術(shù)綜述[J];機(jī)床與液壓;2012年01期

6 楊爾莊;;現(xiàn)代運(yùn)動(dòng)、傳動(dòng)技術(shù)展望[J];機(jī)電產(chǎn)品市場(chǎng);2006年10期

7 楊爾莊;;環(huán)保節(jié)能、電子化和液壓技術(shù)[J];機(jī)電產(chǎn)品市場(chǎng);2007年04期

8 王益群,張偉;流體傳動(dòng)及控制技術(shù)的評(píng)述[J];機(jī)械工程學(xué)報(bào);2003年10期

9 劉曉紅;于蘭英;劉桓龍;柯堅(jiān);;液壓軸向柱塞泵配流盤氣蝕機(jī)理[J];機(jī)械工程學(xué)報(bào);2008年11期

10 冀宏;丁大力;王崢嶸;王秀勇;孫磊;胡啟輝;;液壓電機(jī)泵內(nèi)置孔板離心泵的流場(chǎng)解析與優(yōu)化[J];機(jī)械工程學(xué)報(bào);2009年06期

相關(guān)博士學(xué)位論文 前1條

1 冀宏;液壓閥芯節(jié)流槽氣穴噪聲特性的研究[D];浙江大學(xué);2004年

相關(guān)碩士學(xué)位論文 前6條

1 蘭博杰;液壓電機(jī)葉片泵樣機(jī)的改進(jìn)與實(shí)驗(yàn)[D];蘭州理工大學(xué);2011年

2 劉金慧;軸向柱塞液壓電機(jī)泵流場(chǎng)數(shù)值模擬、效率分析與實(shí)驗(yàn)測(cè)試[D];燕山大學(xué);2011年

3 孫明智;軸向柱塞泵軸向流道的研究[D];西南交通大學(xué);2007年

4 武俊合;液壓電機(jī)葉片泵的振動(dòng)模態(tài)分析[D];蘭州理工大學(xué);2012年

5 孫天健;液壓電機(jī)泵轉(zhuǎn)子支撐方式對(duì)轉(zhuǎn)子動(dòng)特性的影響[D];蘭州理工大學(xué);2012年

6 王金林;一體化電機(jī)葉片泵液壓動(dòng)力單元噪聲特性的研究[D];蘭州理工大學(xué);2012年

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本文編號(hào)：2144947