汽封力作用下的转子-轴承系统稳定性研究  

Studying on Stability of Rotor-bearing System Subjected to the Labyrinth Seal Force

作　　者：赵三星[1] 孟光[2] 荆建平[2] 李鸿光[2] 

机构地区：[1]武汉科技大学机械自动化学院,武汉430081 [2]上海交通大学振动冲击噪声国家重点试验室,上海200240

出　　处：《汽轮机技术》2007年第4期280-284,共5页Turbine Technology

基　　金：国家863项目(2002AA52613-8);上海市优秀学科带头人计划(04XD14012)支持

摘　　要：通过分析汽封力对轴承静态平衡点的影响,表明汽封力能够改变轴承的静、动特性。计算了滑动轴承油膜力和汽封力共同作用下的系统一阶临界转速和一阶对数衰减率,并用实验进行了验证。研究表明,汽封力对系统稳定性的影响是复杂的,其影响因素包括进出口压力、进口预选速度、密封参数等。The influence of labyrinth seal force on the static equilibrium position of the journal bearing has been studied profoundly. It indicates that the labyrinth seal force can change both the static and dynamic characteristics of the bearing, The first critical speed and its log-decrement ratio for the rotor system have been computed when the labyrinth seal force with accompany with the oil-film force have been taken into consideration. It shows that the influence of labyrinth seal force on the stability is complicated, and there exist many influencing factors such as inlet and discharge pressure, inlet circumferential speed, labyrinth seal parameters, etc.

关 键 词：汽封力 滑动轴承 动特性系数 稳定性 

分 类 号：TH133.3[机械工程—机械制造及自动化]