汽轮机自带冠叶片碰撞减振的研究现状与发展  

Impact-damping studies for integral shroud blades of a turbine machinery

作　　者：卢绪祥[1,2] 黄树红[1] 刘正强[2] 李录平[2] 徐大懋[2] 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074 [2]长沙理工大学能源与动力工程学院,长沙410114

出　　处：《振动与冲击》2010年第2期11-16,共6页Journal of Vibration and Shock

基　　金：湖南省自然科学基金重点项目(06JJ20040)

摘　　要：自带冠叶片冠间接触碰撞减振结构具有减振、方便安装与检修、制造精度要求低等优点,已广泛用于汽轮机设计制造并在多台汽轮机上安全运行多年,但目前对这种结构的减振机理和减振效果的研究却很不全面。结合国内外碰撞振动理论的研究成果,从自带冠叶片的碰撞振动特性、动力学模型、数值方法和实验研究等方面来介绍该领域的研究现状,着重阐述对该领域相关发展方向的一些看法,最后展望该领域以后需深入研究的几个关键问题。Integral shroud blades with a contact-impact damping structure in tips have advantages of vibration reduction,convenient installation and low precision for manufacturing.They were successfully applied in stream turbines for safe operation many years ago.But,the study on the damping mechanism and damping effect of such a structure was rather limited.Combined with study developments of vibro-impact theory,the research situation of integral shroud blades was summarized from the aspects,such as,characteristics of vibro-impact,dynamic model,numerical method and experimental studies.Several key problems for future study were also presented.

关 键 词：汽轮机 自带冠叶片 碰撞减振 进展 

分 类 号：TK263[动力工程及工程热物理—动力机械及工程]