【摘要】：推力滑動(dòng)軸承廣泛應(yīng)用于電站、鋼鐵和化工等大型機(jī)械設(shè)備中,作為其關(guān)鍵部件,推力滑動(dòng)軸承的性能直接關(guān)系到機(jī)器整體性能的發(fā)揮。隨著現(xiàn)代工業(yè)的迅速發(fā)展,機(jī)器的運(yùn)轉(zhuǎn)速度和載荷日益提高,對(duì)滑動(dòng)軸承提出了越來(lái)越高的要求。 1990年,朱均通過(guò)對(duì)國(guó)內(nèi)多家水電站的大型水輪發(fā)電機(jī)組中的推力滑動(dòng)軸承進(jìn)行了跟蹤調(diào)查,發(fā)現(xiàn)大型水輪發(fā)電機(jī)組由于推力軸承失效而發(fā)生的故障占水利機(jī)械總事故的55-70%。因此,迫切需要對(duì)推力滑動(dòng)軸承進(jìn)行深入研究。 本文建立可傾瓦推力滑動(dòng)軸承彈流潤(rùn)滑的數(shù)學(xué)模型,編制FORTRAN程序,建立一套分析軟件,對(duì)可傾瓦推理滑動(dòng)軸承的潤(rùn)滑性能作數(shù)值分析,以此來(lái)代替一部分昂貴的試驗(yàn)研究,同時(shí)也可以指導(dǎo)軸承設(shè)計(jì)。 本文第一章介紹了推力滑動(dòng)軸承彈流潤(rùn)滑研究的工程意義,從流體動(dòng)壓潤(rùn)滑、彈流潤(rùn)滑和實(shí)驗(yàn)研究等三方面講述了推力滑動(dòng)軸承彈流潤(rùn)滑的研究進(jìn)展,概述了推力滑動(dòng)軸承的總體結(jié)構(gòu)、支承結(jié)構(gòu)、軸瓦材料以及失效形式,并在此基礎(chǔ)上提出了本文的研究?jī)?nèi)容。 第二章在前人的基礎(chǔ)上建立了可傾瓦推力滑動(dòng)軸承彈流潤(rùn)滑的數(shù)學(xué)模型,主要包含雷諾方程、潤(rùn)滑油粘度溫度關(guān)系式、密度溫度關(guān)系式、油膜厚度方程、能量方程和彈性變形方程,以及它們的邊界條件。 第三章介紹了數(shù)學(xué)方程的無(wú)量綱、離散化、求解方法以及程序求解流程,編制了可傾瓦推力滑動(dòng)軸承流體動(dòng)壓潤(rùn)滑(THD)性能分析軟件,分析了載荷、轉(zhuǎn)速、油品和軸瓦材料等對(duì)軸承潤(rùn)滑性能的影響。 第四章分析了入口坡形對(duì)推力滑動(dòng)軸承THD潤(rùn)滑性能的影響,計(jì)算了三種不同坡形型式和四種不同坡形斜度的入口坡形THD潤(rùn)滑性能。 第五章編制了可傾瓦推力滑動(dòng)軸承彈流潤(rùn)滑(TEHD)性能分析軟件,對(duì)比了THD和TEHD兩種模型的計(jì)算結(jié)果,分析了載荷、轉(zhuǎn)速、油品對(duì)軸承潤(rùn)滑性能的影響。 第六章分析了軸線偏斜對(duì)可傾瓦推力滑動(dòng)軸承TEHD潤(rùn)滑性能的影響,計(jì)算了五組不同傾斜角下軸承的潤(rùn)滑性能,并將其與對(duì)中時(shí)的軸承潤(rùn)滑性能作對(duì)比分析。 第七章總結(jié)了本文的工作內(nèi)容,指出了下一步工作方向。
[Abstract]:Thrust sliding bearings are widely used in large mechanical equipment such as power station, steel and chemical industry. As the key components of thrust sliding bearings, the performance of thrust sliding bearings is directly related to the performance of the whole machine. With the rapid development of modern industry, the running speed and load of the machine are increasing day by day. By tracing and investigating the thrust sliding bearing of large hydroturbine generator set of many hydropower stations in China, Zhu Jun found that the failure of large hydrogenerator unit due to the failure of thrust bearing accounts for 55-70% of the total accidents of water conservancy machinery. Therefore, there is an urgent need for in-depth study of thrust sliding bearings. In this paper, the mathematical model of elastohydrodynamic lubrication of tilting pad thrust sliding bearing is established, FORTRAN program is compiled and a set of analysis software is established to make numerical analysis of lubricating performance of tilting pad inferential sliding bearing, so as to replace some expensive experimental research. At the same time can also guide bearing design. In the first chapter of this paper, the engineering significance of elastohydrodynamic lubrication of thrust sliding bearing is introduced. The research progress of elastohydrodynamic lubrication of thrust sliding bearing is described from three aspects: hydrodynamic lubrication, elastohydrodynamic lubrication and experimental study. The general structure, supporting structure, bearing material and failure form of thrust sliding bearing are summarized, and the research contents of this paper are put forward. In the second chapter, the mathematical model of elastohydrodynamic lubrication of tilting pad thrust sliding bearing is established, which includes Reynolds equation, lubricant viscosity and temperature relation, density temperature relation, oil film thickness equation, etc. Energy equation and elastic deformation equation, and their boundary conditions. In the third chapter, the infinitesimal, discretization, solving method and program flow of mathematical equation are introduced. The (THD) analysis software for hydrodynamic lubrication of tilting pad thrust sliding bearing is developed, and the load and rotational speed are analyzed. The influence of oil and bearing material on the lubricating performance of bearing. In chapter 4, the influence of inlet slope shape on THD lubrication performance of thrust sliding bearing is analyzed, and three different slope types and four different slope THD lubricating properties are calculated. In chapter 5, the (TEHD) software for elastohydrodynamic lubrication of tilting pad thrust sliding bearings is developed. The results of THD and TEHD models are compared, and the effects of load, speed and oil on the lubrication performance of bearings are analyzed. In chapter 6, the influence of axis deflection on TEHD lubrication performance of tilting pad thrust sliding bearing is analyzed. The lubrication performance of five groups of bearings with different inclination angles is calculated and compared with that of middle bearing. The seventh chapter summarizes the work of this paper, pointing out the next work direction.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類(lèi)號(hào)】：TH133.31

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 郅剛鎖,朱均;油膜流場(chǎng)可視化的實(shí)時(shí)性研究[J];計(jì)算機(jī)輔助設(shè)計(jì)與圖形學(xué)學(xué)報(bào);2004年01期

2 段芳莉,韋云隆;用柔度矩陣法對(duì)徑向滑動(dòng)軸承的彈流潤(rùn)滑分析[J];機(jī)械設(shè)計(jì)與研究;2000年04期

3 王志剛,蔣立軍,俞炳豐,朱均;可傾瓦推力軸承瞬態(tài)熱效應(yīng)的實(shí)驗(yàn)研究[J];機(jī)械科學(xué)與技術(shù);2000年06期

4 郅剛鎖,朱均;巨型推力軸承油膜的綜合可視化系統(tǒng)[J];機(jī)械科學(xué)與技術(shù);2002年02期

5 李忠,李自新,薛書(shū)文;推力軸承線性與非線性穩(wěn)定性研究[J];機(jī)械科學(xué)與技術(shù);2002年03期

6 李忠;秦大同;;可傾瓦推力軸承系統(tǒng)的穩(wěn)定性和失穩(wěn)轉(zhuǎn)速分析[J];機(jī)械科學(xué)與技術(shù);2008年02期

7 陳渭，，朱均，薛永寬;大型推力軸承熱彈流動(dòng)力潤(rùn)滑的性能計(jì)算[J];機(jī)械科學(xué)與技術(shù);1994年04期

8 李忠,王風(fēng)才,袁曉陽(yáng),朱均;螺旋面扇形瓦推力軸承熱動(dòng)力潤(rùn)滑性能分析[J];機(jī)械科學(xué)與技術(shù);1999年03期

9 李忠,袁小陽(yáng),朱均;可傾瓦推力軸承中進(jìn)口壓力對(duì)熱動(dòng)力潤(rùn)滑性能的影響[J];機(jī)械科學(xué)與技術(shù);1999年04期

10 陸懷民;于曉東;郭秀榮;李永海;邵俊鵬;;復(fù)合材料瓦面推力軸承彈性模量的研究[J];機(jī)械設(shè)計(jì);2007年02期

本文編號(hào)：2193574