超超临界汽轮机转子系统稳定性分析及试验研究  

Ultra-supercritical Steam Turbine′s Rotor System′s Stability Analysis and Experimental Study

作　　者：沈小要[1] 赵玫[1] 荆建平[1] 

机构地区：[1]上海交通大学振动冲击噪声国家重点实验室,上海200240

出　　处：《机械科学与技术》2006年第10期1139-1142,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家"863"项目(2002AA52613-8)资助

摘　　要：从有限元法出发,把转子和不转动的轴承-基础系统作为一个耦合的整体处理,开发了能够计入汽流激振的计算程序。通过带有迷宫式密封的超超临界汽轮机转子系统模拟试验台测试的临界转速与有限元分析结果的比较,验证了算法所用数学模型的正确性。然后,利用该程序对模拟试验台进行了转子系统稳定性分析,分析结果表明汽流激振对转子系统稳定性有较大影响。Starting form the finite element （FE） method, the paper treated the rotational rotor and the stationary bearings and foundation systems as a coupled whole. It developed a computational program that can count steam-excited vibrations. A comparison of the critical rotational speeds tested from an experimental platform which simulates the rotor system of an ultra-supercritical steam turbine with the FE analysis results testifies the correctness of the mathematical model used. Furthermore, the program was used to analyze the stability of the simulated rotor system, the results of which indicate that the steam-excited vibrations have great influence on the rotor systemg stability.

关 键 词：超超临界汽轮机 转子系统 汽流激振 稳定性 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程] TH113[机械工程—机械设计及理论]