可倾瓦径向滑动轴承润滑特性研究

发布时间：2019-03-28 10:40

【摘要】：可倾瓦径向滑动轴承因具有摩擦功耗小、运转较平稳、具有自动调节能力等特点,被广泛地应用于大型的水轮机、压缩机和汽轮机等旋转机械上,作为旋转机械的关键部件,其工作性能直接影响整个机器的工作状态。随着现代旋转机械向高速、重载、高精度方向发展,对可倾瓦径向滑动轴承提出了越来越高的要求,因此,针对可倾瓦径向滑动轴承润滑特性的研究显得尤为重要。本文的主要内容如下:1、基于流体动压润滑理论,给出了可倾瓦径向滑动轴承不可压缩定常流动Reynolds方程,采用有限差分法对Reynolds方程进行求解,得到了 Reynolds边界条件下的油膜压力和厚度的3D分布图。2、建立了考虑支点摩擦力的可倾瓦径向滑动轴承润滑模型,计算得到了考虑支点摩擦力时的轴承静态特性和动态特性,并分析对比了可倾瓦径向滑动轴承在考虑支点摩擦力与不考虑支点摩擦力时的润滑特性差异。3、基于3D有限元法,建立了可倾瓦径向滑动轴承轴瓦弹性变形的数学模型,将求解轴瓦弹性变形的有限元法与求解油膜压力的有限差分法相耦合,求得了同时计及轴瓦弹性变形和支点摩擦力的油膜压力、油膜厚度、摩擦功耗等特性,分析了轴瓦弹性变形对可倾瓦径向滑动轴承润滑特性的影响。4、基于油膜温度场方程、轴瓦导热方程、温粘方程和广义Reynolds方程,考虑支点摩擦力,求解了可倾瓦径向滑动轴承油膜温度场、轴瓦温度场和油膜压力分布,分析了温粘热效应对轴承性能的影响。本文的研究工作可为可倾瓦径向滑动轴承的设计提供理论依据。
[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.
【学位授予单位】：西安理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH133.31

【参考文献】

相关期刊论文 前10条

1 朱光;郭红;李瑞珍;鲁兴学;;计入温黏效应的高速径向动压轴承特性分析[J];润滑与密封;2016年08期

2 王培勇;王建文;袁延昂;;瞬变载荷作用下五瓦可倾瓦滑动轴承特性分析[J];润滑与密封;2016年04期

3 邹争;董从林;毛树华;袁成清;;水润滑橡胶艉轴承变形程度影响因素分析[J];润滑与密封;2016年03期

4 陈园;刘桂萍;林禄生;;计及润滑流体热效应的高速静压滑动轴承性能分析[J];机械强度;2015年06期

5 李萌萌;王小静;蒋登峰;朱健申;;可倾瓦轴承支点静刚度的有限元分析[J];润滑与密封;2015年08期

6 姬英明;;可倾瓦滑动轴承轴瓦变形数值分析[J];科技视界;2014年31期

7 田大成;孙淑凤;孙立佳;高元景;;可倾瓦径向气体轴承支点分析[J];低温与超导;2014年10期

8 刘思涌;肖忠会;闫志勇;陈朱杰;;支点弹性、阻尼可倾瓦轴承动力特性数值仿真及试验研究[J];机械工程学报;2014年19期

9 吕芳蕊;孙丽军;张丽君;官永胜;钟海权;袁小阳;;径向滑动轴承变形与润滑耦合设计的双间隙协调法[J];汽轮机技术;2014年02期

10 张帆;钟海权;孙丽军;官永胜;袁小阳;;轴瓦热弹变形对大直径重载滑动轴承性能的影响[J];机械设计与研究;2014年02期

相关博士学位论文 前1条

1 王丽萍;可倾瓦轴承动力学建模及动力特性研究[D];复旦大学;2007年

相关硕士学位论文 前1条

1 柳江林;计及曲轴受载变形的曲轴轴承热弹性流体动力润滑分析[D];合肥工业大学;2007年

，

本文编号：2448787