转速数对滑动轴承动力学系数影响研究  

Effects of rotor speed on plain bearing dynamic coefficients

作　　者：马文生[1,2,3] 陈照波[2] 焦映厚[2] Kirk R G 

机构地区：[1]中航工业沈阳发动机设计研究所,沈阳110015 [2]哈尔滨工业大学机电工程学院,哈尔滨150001 [3]弗吉尼亚理工大学转子动力学实验室,美国24061

出　　处：《振动与冲击》2014年第5期8-13,共6页Journal of Vibration and Shock

基　　金：国家自然基金(10872054;10872055);高等学校学科创新引智计划(B07018);国家留学基金(批准号:2009612139);黑龙江省自然科学基金重点项目(ZD200905);高等学校博士学科点专项基金资助项目(20092302110009)

摘　　要：建立了滑动轴承的基于短轴承非线性油膜力模型,通过转速对轴承动力学特性的影响研究,得到了偏心率、最小油膜厚度、最大油膜压力、摩擦功耗、温升、临界轴颈质量、刚度系数、阻尼系数、二维和三维油膜压力的影响因素研究;在对三维油膜压力分析时发现转速存在一个临界值,当转速低于这个临界值时,转速对最大油膜压力影响较大,当转速高于这个临界值时,转速对最大油膜压力影响不大。Two bearing dynamic models were introduced,including the traditional eight-parameter bearing model and the short-bearing oil film force model.The effects of rotor speed and Sommerfeld number on bearing dynamic characteristics were studied,and the influencial factors were inspected,such as the eccentricity,minimum film thickness, maximum film pressure,friction power,temperature,critical journal mass,stiffness coefficient,damping coefficient,and 2D and 3D film pressure.It was shown that there exists a critical rotor speed when analyzing 3D film pressure,the maximum film pressure is greatly affected by the rotor speed when the rotor speed is below the critical speed,and the maximum film pressure is slightly affected when the rotor speed is higher than the critical speed.

关 键 词：转速数 动力学系数 REYNOLDS方程 DYNAMIC ROTOR-BEARING system (DyRoBes) 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]