小弹簧支撑式推力轴承润滑计算及影响因素分析  

Calculation of lubricity and analysis of influencing factors for small spring-supported thrust bearing

作　　者：支发林[1] 胡伟强 阎宗国[3] 王正伟[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [2]杭州力源发电设备有限公司,杭州311202 [3]中国农业大学水利与土木工程学院,北京100083

出　　处：《水力发电学报》2015年第4期157-162,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(51279205)

摘　　要：小弹簧支撑式推力轴承具有承载力强及散热性好等优点,在水电机组中应用广泛。对小弹簧支撑式推力轴承进行了三维润滑计算,提出了一种新的弹簧刚度等效方法,同时计算了推力瓦弹性变形、热变形及弹簧压缩变形的影响。并研究了转速、进油温度和轴瓦厚度等参数的变化对推力轴承性能的影响,讨论了不同的弹簧布置方式与推力轴承性能的关系,发现进油区域及推力瓦径向中部区域的弹簧数量,直接关系到推力轴承性能的好坏,设计时应进行合理优化。Small spring-supported thrust bearing, advantageous in great bearing capacity and good heat dissipation, is widely used in the hydro turbine. To study this type of bearing, we calculated three-dimensional thermo-elastic hydrodynamic lubrication and developed a new method of equivalent spring stiffness. And we examined the influences of the thrust pad＇s elastic deformation and thermal deformation and the spring＇s compression deformation, including the factors of thrust bearing performance, i.e. rotation speed, initial temperature, thickness of thrust pad, etc. This paper presents the results and a discussion on the relationship of bearing performance versus different arrangement of the spring and comes to a conclusion that the performance depends on the number of springs in the oil region and central thrust pad＇s radial region and the number should be optimized at the design stage.

关 键 词：水轮发电机 推力轴承 小弹簧 润滑计算 

分 类 号：TV734[水利工程—水利水电工程]