燃气轮机齿轮耦合转子系统的动力学特性  

Dynamic characteristics research of gear coupling rotor system in gas turbine

作　　者：秦大同[1] 钱恩[1] 石万凯[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2010年第1期19-24,共6页Journal of Chongqing University

基　　金：国家科技支撑计划项目(2006BAF01B07-01)

摘　　要：在考虑滑动轴承的基础上,利用传递矩阵法分别建立了两单轴转子的弯曲振动分析模型,推导了人字齿轮耦合单元的传递矩阵,应用整体传递矩阵法建立了人字齿轮转子系统的弯扭耦合振动分析模型,对某燃气轮机齿轮-转子-轴承系统进行了振动特性分析。通过数值计算与分析,获得齿轮转子系统的特征值、对数衰减率及临界转速。结果表明该齿轮-转子-轴承系统的工作转速远离临界转速,具有工作的稳定性和安全性。Taking the sliding bearing into account, the lateral vibration analysis models of two single rotor were built respectively using the transfer matrix method. The transmission matrix of herringbone gear coupled unit is derived. Using whole transfer matrix method, the lateral-torsional coupling analysis model of herringbone gear-rotor system is set up, and the vibration characteristics of gear rotor bearing system in gas turbine is analyzed. Through numerical calculation and anlysis, the eigenvalue of gear-rotor system, the Logarithmic decrement and the critical speed are obtained. The result shows that the working speed of this gear-rotor-bearing system is far away from the critical speed, therefore the system is stable and safe.

关 键 词：转子 弯扭耦合 临界转速 人字齿轮 传递矩阵法 

分 类 号：TH113[机械工程—机械设计及理论]