下支承摩擦副相对滑动的垂直转子的动力行为  

Dynamic behavior of vertical rotor with slip support pairs

作　　者：李正光[1] 董金平[1] 张小章[1] 

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第6期817-820,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：实际运行中垂直转子系统的下支承摩擦副之间存在相对滑动。为了了解这种相对滑动对转子系统动力行为的影响,建立了垂直转子动力学模型,并通过数值计算模拟了转子在稳态和非稳态时的振动特征。测量实际运行时垂直转子的振动特征,测量结果与理论分析结果吻合较好。这表明建立的动力学模型和采用的数值方法是有效的。分析结果表明:当摩擦力或油膜刚度增加时,系统的抗干扰能力随之提高;转速的升高使系统抗干扰能力减弱;摩擦力增加使系统低频进动频率升高;油膜刚度增加使系统低频进动频率降低。Slip occurs between the support pairs during the running of a vertical rotor. A dynamic model was developed to analyze the influence of the slip on the rotor dynamic behavior. The rotor vibration was simulated for stable and unstable conditions. The simulation results agree well with experimental measurements of the vibrations of a running rotor. The result shows that the dynamic model can predict the slip effects and resulting vibration. Further calculation shows that the increase of friction and oil film rigidity or the decrease of rotation speeds improves the dynamical stability and the precession frequency is proportional to the friction and inverse proportional to the oil film rigidity.

关 键 词：转子 摩擦 油膜刚度 低频进动 

分 类 号：TH133[机械工程—机械制造及自动化]