本文關(guān)鍵詞： 板式平衡閥 螺紋插裝式平衡閥 閥口面積 流場仿真 動態(tài)特性　出處：《蘭州理工大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：液壓平衡閥是平衡回路中的關(guān)鍵元件,在現(xiàn)代工程機(jī)械尤其是在起重機(jī)械中應(yīng)用廣泛。起重設(shè)備中的提升、變幅及伸縮等機(jī)構(gòu)在下降時,在運(yùn)動方向與負(fù)載作用方向相同的情況下,必須在回油處設(shè)置平衡閥,用以平衡負(fù)載,保證執(zhí)行元件平穩(wěn)運(yùn)行,從而提高液壓系統(tǒng)的穩(wěn)定性。平衡閥對液壓平衡回路系統(tǒng)整體的工作平穩(wěn)性、可靠性和系統(tǒng)效率有重要的影響。本文采用了理論分析和數(shù)值模擬相結(jié)合的研究方法,對板式平衡閥和螺紋插裝式平衡閥的工作原理、閥口面積計算、內(nèi)部流場及動態(tài)特性進(jìn)行分析比較與計算,研究主要參數(shù)對其性能的影響,為高性能平衡閥設(shè)計提供依據(jù)。 主要內(nèi)容如下: 第1章,闡述了本課題研究的背景和意義;概述了液壓平衡閥的研究現(xiàn)狀和存在的問題;概括了本文的主要研究內(nèi)容。 第2章,介紹幾種常用的液壓平衡閥的工作原理、結(jié)構(gòu)特點(diǎn)及存在的問題,并對板式平衡閥和螺紋插裝式平衡閥做了分析比較。 第3章,對板式平衡閥和螺紋插裝式平衡閥的閥口面積進(jìn)行了數(shù)值解析,得到這平衡閥閥口面積的曲線;利用Fluent軟件對板式平衡閥和螺紋插裝式平衡閥的內(nèi)部流場進(jìn)行了數(shù)值解析,得到平衡閥在不同閥口開度下的壓力、流速分布情況,并對數(shù)值計算結(jié)果進(jìn)行了分析比較。 第4章,運(yùn)用AMESim軟件建立帶有板式平衡閥的液壓平衡回路的AMESim仿真模型,得到板式平衡閥在各種工況下的動態(tài)響應(yīng)曲線。仿真分析了油缸負(fù)重和平衡閥內(nèi)阻尼孔、主閥芯節(jié)流槽類型、彈簧剛度主要參數(shù)對平衡閥及其回路動態(tài)特性的影響。結(jié)果表明油缸負(fù)重、平衡閥內(nèi)阻尼孔和節(jié)流槽類型對活塞桿下行運(yùn)動的速度平穩(wěn)性具有重要影響。 第5章,建立了帶有螺紋插裝式平衡閥的液壓平衡回路的AMESim仿真模型,仿真分析了油缸負(fù)重和平衡閥內(nèi)阻尼孔、閥口錐角、彈簧剛度等主要參數(shù)對平衡閥及其回路動態(tài)特性的影響。結(jié)果表明油缸負(fù)重、平衡閥內(nèi)阻尼孔和閥口錐角等對油缸下行運(yùn)動的速度平穩(wěn)性產(chǎn)生重要影響,本研究為螺紋插裝式平衡閥的設(shè)計及平衡回路參數(shù)匹配提供了指導(dǎo)。并與第四章中影響板式平衡閥動態(tài)特性參數(shù)進(jìn)行分析及比較,得出兩者在影響平衡閥結(jié)構(gòu)及平衡閥回路系統(tǒng)性能的區(qū)別。 最后,對本論文的研究工作和成果進(jìn)行了總結(jié),展望了下一步的研究工作。
[Abstract]:Hydraulic balancing valve is the key element in the balance circuit. It is widely used in modern construction machinery, especially in lifting machinery. When the movement direction is the same as the load direction, the balancing valve must be set at the return oil to balance the load and ensure the smooth operation of the actuator. In order to improve the stability of the hydraulic system, the balance valve for the hydraulic balance loop system as a whole work smoothly. Reliability and system efficiency have important influence. In this paper, the working principle of plate balance valve and threaded plug balance valve and the calculation of valve opening area are studied by combining theoretical analysis and numerical simulation. The internal flow field and dynamic characteristics are analyzed and calculated, and the influence of main parameters on the performance of the valve is studied, which provides the basis for the design of high performance balance valve. The main contents are as follows: In the first chapter, the background and significance of the research are described, the research status and existing problems of hydraulic balancing valve are summarized, and the main research contents of this paper are summarized. In chapter 2, the working principle, structural characteristics and existing problems of several kinds of hydraulic balancing valves are introduced, and the balance valves of plate type and threaded plug type are analyzed and compared. In chapter 3, the numerical analysis of the orifice area of the plate balance valve and the threaded plug balance valve is carried out, and the curve of the balance valve opening area is obtained. The internal flow field of plate balance valve and threaded plug balanced valve was analyzed by Fluent software, and the pressure and velocity distribution of the balance valve under different opening degrees were obtained. The numerical results are analyzed and compared. In chapter 4, the AMESim simulation model of hydraulic balancing circuit with plate balance valve is established by using AMESim software. The dynamic response curves of the plate balance valve under various working conditions were obtained. The cylinder load and damping hole in the balance valve and the main valve core throttling slot type were simulated. The main parameters of spring stiffness affect the dynamic characteristics of the balancing valve and its loop. The results show that the load of the cylinder, the damping hole in the balance valve and the type of throttling slot have an important influence on the speed and smoothness of the piston rod moving down. In chapter 5, the AMESim simulation model of hydraulic balancing circuit with threaded insert balancing valve is established, and the cylinder load and damping hole and valve orifice cone angle are simulated and analyzed. The influence of spring stiffness and other main parameters on the dynamic characteristics of the balancing valve and its loop. The results show that the load of the cylinder, the damping hole in the balance valve and the cone angle of the valve mouth have an important effect on the smoothness of the downward motion of the cylinder. This study provides guidance for the design of threaded insert balance valve and the matching of balance circuit parameters. It is also analyzed and compared with the dynamic characteristic parameters of the plate balance valve in Chapter 4th. The difference of the balance valve structure and the performance of the balance valve loop system is obtained. Finally, the research work and results of this paper 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)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH137.52

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉丹,劇引芳,馬彪,孫憲林;基于AMEsim的液力變矩器進(jìn)出口定壓閥動態(tài)仿真研究[J];車輛與動力技術(shù);2005年02期

2 廖義德,李壯云;帶壓力補(bǔ)償平衡閥的設(shè)計及性能研究[J];鍛壓裝備與制造技術(shù);2003年03期

3 馮開林,陳康寧,鄒廣德,高松;先進(jìn)液壓控制技術(shù)在工程機(jī)械的應(yīng)用研究[J];工程機(jī)械;2002年05期

4 黃建兵;輪式裝載機(jī)的發(fā)展方向與中國裝載機(jī)的出路[J];工程機(jī)械與維修;2004年05期

5 劉良臣;;中國裝載機(jī)開拓國際市場之路[J];工程機(jī)械與維修;2008年08期

6 冀宏;王東升;丁大力;譚正生;劉小平;;非全周開口滑閥閥口面積的計算方法[J];蘭州理工大學(xué)學(xué)報;2008年03期

7 姚征,陳康民;CFD通用軟件綜述[J];上海理工大學(xué)學(xué)報;2002年02期

8 趙雙龍;許長華;魏超;;滑閥穩(wěn)態(tài)液動力的計算和分析[J];火箭推進(jìn);2006年03期

9 賀勁;液壓步履式樁架起架機(jī)構(gòu)平衡回路的改進(jìn)設(shè)計[J];建設(shè)機(jī)械技術(shù)與管理;1995年04期

10 彭勇;FD型平衡閥工作原理[J];建設(shè)機(jī)械技術(shù)與管理;2002年07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3條

1 賀輝;新型工程機(jī)械液壓平衡閥的設(shè)計與試驗研究[D];湖南大學(xué);2002年

2 王東升;節(jié)流槽滑閥閥口流量系數(shù)及穩(wěn)態(tài)液動力計算的研究[D];蘭州理工大學(xué);2008年

3 譚正生;裝載機(jī)流量放大型轉(zhuǎn)向液壓系統(tǒng)的減振研究[D];蘭州理工大學(xué);2009年

，

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