摘要
针对燃气轮机支承座的设计目的,使得转子振幅尽量降低,以现有的转子系统动力学方程模型下,在三维坐标系中建立出支承刚度、阻尼和转子质点无量刚振幅的曲面关系。通过软件开发与计算,得到刚度-阻尼平面的一个区域内,多个不同的偏心率下最大振幅云图以及所产生振幅的转速云图。根据这些云图总结出转子系统在启动或停止时,偏心率的不同使可能造成事故的刚度、阻尼匹配点分布的变化规律,引入了极大振幅线的概念,并从中讨论了高速转子启动和停止时支承参数适合选择的位置。结果表明支承参数的选取在稳定情况下使转子处于最小振幅时反而是不安全的,应当在低偏心率变化下,极大振幅线快速划过的区域选取刚度-阻尼点。
According to the purpose of the gas turbine supporter design,the rotor amplitude is made to decrease,under the existing rotor system dynamics equation model,a surface relationship of rotor＇s nondimensional amplitude,supporter＇s stiffness and damping is established in a 3D coordinate system.According to these nephogram,it is sumed up that the rotor system when in start or stop,under different eccentricity the distribution change rule of stiffness which may lead to accident,and damping matching point,introducing the concept of maximum amplitude line,and discussing the position that supporting parameter is suitable to choose when high-speed rotor starts or stops.The results show that the selection of supporting parameters in stable condition makes rotor in minimum amplitude which is not safe,and should under low eccentricity change,chooses the stiffness,damping point in area that the maximum amplitude line fast goes across.
出处
《机械设计与制造》
北大核心
2013年第1期134-136,共3页
Machinery Design & Manufacture
基金
国家自然科学基金(11072209)
国家重点基础研究发展计划(973计划)(2007CB707706)支持项目
关键词
燃气轮机
支承座
参数匹配
刚度
阻尼
Gas Turbine
Supporter
Matching Parameter
Stiffness
Damping
