【作者】 张路；

【导师】 郭伟；

【作者基本信息】 天津大学 ， 机械制造及其自动化， 2008， 硕士

【摘要】 推力轴承作为水轮发电机关键部件之一,直接关系到发电机的寿命和运行的可靠性,尤其是它的润滑性能备受关注。传统的分析大多是在假设轴瓦为刚性的前提下进行轴承的研究和设计,忽略了弹性变形对润滑性能的影响。而且,对分析计算软件并没有过多的进行研究。本文针对上述问题,在润滑分析中考虑了弹性变形的影响,从理论出发对推力轴承热弹性流体润滑进行了研究,建立了更为准确的润滑性能分析式,可以更精确的计算其润滑性能。设计开发了一套推力轴承润滑性能分析软件,方便了使用者的计算。论文主要进行了以下方面的工作:1、以解决推力轴承润滑性能问题为目标,从摩擦学的概念出发,研究了推力轴承润滑的基本理论,并就此建立了基本的润滑数学模型。联立求解了雷诺方程、能量方程、粘温方程和油膜厚度方程,描述了润滑的基本特征。2、考虑了弹性变形对润滑性能的影响。通过仿真计算对轴承的弹性变形进行了分析,在润滑分析中加入弹性变形的影响,使润滑性能分析更加准确。3、利用Visual Basic语言编写润滑计算程序。讨论了有限元分析软件的参数化问题,将ANSYS计算弹性变形的过程也包含在计算程序中。利用该程序可解出推力轴承的润滑性能,即压力场与温度场的分布。借助软件输入参数可变的优点分析了主要参数对润滑性能的影响情况。更多还原

【Abstract】 The thrust bearing of the hydrogenerator is one of the most design contents, and they are directly related to the life of generator and the reliability of operation, especially in lubrication performance. In the past, the research and design of bearing were taken on the premise of assuming the bearing is rigid, neglected the elastic deformation of bearing . It also did not care the program for calculation. This dissertation based on the theory of lubrication, studies the thermal elastohydrodynamic lubrication properties of the thrust bearings, including the elastic deformation of thrust bearing, making the analysis of lubrication performance improve. A analysis software of thrust bearing lubrication performance is designed for users.The content of this paper is:1. Aim at solved the thrust bearing lubrication performance problems, researches the basic of the thrust bearing lubrication, foundation on the principle of thetribology. Establishes of mathematical model of lubrication performance. Reynolds equation, energy equation, viscosity-temperature equation and oil film thickness equation of the lubricant are solved simultaneously in the program, and lubrication characteristics can be obtained.2. Consider the elastic deformation of thrust bearing for the lubricating performance. Thermo-elastic-deformation of thrust bearing is analyzed by means of ANSYS. It makes results more accurate.3. Lubrication calculation is programmed with Visual Basic. Discussed the parametric of the FEA software. The program is included the calculation of thermo-elastic-deformation by ANSYS. The lubrication performance of thrust bearing is solved by the program, just as pressure and temperature distribution venues. Research the main parameters of the bearings how to impact the lubrication performance by the program.更多还原