汽轮发电机组滑动轴承稳定性优化设计及分析

Optimized Analysis of Stability of Turbogenerator Sliding Bearings

分析了200 MW汽轮发电机组稳定性,以稳定裕度、失稳转速和灵敏度为目标对椭圆轴承的主要参数进行优化分析。结合汽轮发电机组的工作特性提出稳定性优化的主目标法,建立了灵敏度分析的表达式,给出了优化分析的结果和轴承参数优化下低频模态的特征值与振型。

The stability of the 200 MW turbogenerator is analyzed and optimized analysis is made for the major parameters of its oval bearings, including the stability margin, speed instability and sensitivity. The main objectives of stability optimization are proposed in respect to the working characteristics of the turbogenerator. Furthermore, the expression of sensitivity analysis is estab- lished, and the results of optimized analysis, the eigenvalue and oscillation in low-frequency mode of the optimized bearing parameters are provided.