【摘要】：可傾瓦徑向滑動軸承因具有摩擦功耗小、運轉(zhuǎn)較平穩(wěn)、具有自動調(diào)節(jié)能力等特點,被廣泛地應(yīng)用于大型的水輪機、壓縮機和汽輪機等旋轉(zhuǎn)機械上,作為旋轉(zhuǎn)機械的關(guān)鍵部件,其工作性能直接影響整個機器的工作狀態(tài)。隨著現(xiàn)代旋轉(zhuǎn)機械向高速、重載、高精度方向發(fā)展,對可傾瓦徑向滑動軸承提出了越來越高的要求,因此,針對可傾瓦徑向滑動軸承潤滑特性的研究顯得尤為重要。本文的主要內(nèi)容如下:1、基于流體動壓潤滑理論,給出了可傾瓦徑向滑動軸承不可壓縮定常流動Reynolds方程,采用有限差分法對Reynolds方程進行求解,得到了 Reynolds邊界條件下的油膜壓力和厚度的3D分布圖。2、建立了考慮支點摩擦力的可傾瓦徑向滑動軸承潤滑模型,計算得到了考慮支點摩擦力時的軸承靜態(tài)特性和動態(tài)特性,并分析對比了可傾瓦徑向滑動軸承在考慮支點摩擦力與不考慮支點摩擦力時的潤滑特性差異。3、基于3D有限元法,建立了可傾瓦徑向滑動軸承軸瓦彈性變形的數(shù)學(xué)模型,將求解軸瓦彈性變形的有限元法與求解油膜壓力的有限差分法相耦合,求得了同時計及軸瓦彈性變形和支點摩擦力的油膜壓力、油膜厚度、摩擦功耗等特性,分析了軸瓦彈性變形對可傾瓦徑向滑動軸承潤滑特性的影響。4、基于油膜溫度場方程、軸瓦導(dǎo)熱方程、溫粘方程和廣義Reynolds方程,考慮支點摩擦力,求解了可傾瓦徑向滑動軸承油膜溫度場、軸瓦溫度場和油膜壓力分布,分析了溫粘熱效應(yīng)對軸承性能的影響。本文的研究工作可為可傾瓦徑向滑動軸承的設(shè)計提供理論依據(jù)。
[Abstract]:Tilting tile radial sliding bearing is widely used in large-scale rotating machinery such as turbine, compressor and steam turbine because of its low friction power consumption, stable operation and automatic regulating ability. It is the key component of rotating machinery. Its working performance directly affects the working state of the whole machine. With the development of modern rotating machinery to the direction of high speed, heavy load and high precision, the requirements of tilting tile radial sliding bearing are more and more high. Therefore, it is very important to study the lubrication characteristics of tilting tile radial sliding bearing. The main contents of this paper are as follows: 1. Based on hydrodynamic lubrication theory, the incompressible steady flow Reynolds equation of tilting tile radial journal bearing is presented, and the Reynolds equation is solved by finite difference method. The 3D distribution diagram of oil film pressure and thickness under Reynolds boundary condition is obtained. 2. The lubrication model of tilting tile radial sliding bearing considering the friction of fulcrum is established, and the static and dynamic characteristics of bearing considering the friction of fulcrum are calculated. The lubrication characteristics of tilting pad radial sliding bearing with and without fulcrum friction are analyzed and compared. 3. Based on 3D finite element method, a mathematical model of elastic deformation of tilting tile radial sliding bearing is established. The finite element method for solving the elastic deformation of bush is coupled with the finite difference method for solving oil film pressure. The characteristics of oil film pressure, oil film thickness and friction power dissipation are obtained, which take into account the elastic deformation of the bearing and the friction force at the fulcrum at the same time. The influence of elastic deformation of bush on lubrication characteristics of tilting bearing is analyzed. 4. Based on oil film temperature field equation, bearing heat conduction equation, temperature viscosity equation and generalized Reynolds equation, the friction of fulcrum is considered. The oil film temperature field, bush temperature field and oil film pressure distribution of tilting pad radial sliding bearing are solved, and the effect of thermal effect of temperature viscosity on bearing performance is analyzed. The research work in this paper can provide a theoretical basis for the design of tilting tile radial plain bearings.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH133.31

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