减振结构对600MW汽轮发电机组轴系扭振抑制作用的研究  

Effects of Damping Structure on the Suppression of Torsional Vibration in a 600 MW Turbo-Generator Shaft System

作　　者：徐鼎杰 李录平[1] 周子健 卢绪祥[1] 牛晓瑞 陈逸爽 XU Dingjie;LI Luping;ZHOU Zijian;LU Xuxiang;NIU Xiaorui;CHEN Yishuang(School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410014,China)

机构地区：[1]长沙理工大学能源与动力工程学院,长沙410014

出　　处：《动力工程学报》2020年第5期392-397,共6页Journal of Chinese Society of Power Engineering

基　　金：中国南方电网公司科技资助项目;长沙理工大学资助项目(CX2018SS12)。

摘　　要：以国产某亚临界600MW汽轮发电机组轴系为研究对象,采用Solidworks软件对该机组轴系进行三维实体建模,并对有无减振结构时的振幅进行对比分析。结果表明:有减振结构时汽轮发电机组轴系振幅明显下降;在三相短路故障激励下时间节点0.2s时出现最大振幅;减振结构使转轴最大振幅下降,同时使振幅衰减速度明显加快,验证了减振结构对轴系扭振抑制的有效性。Taking the torsional vibration characteristics of the shaft system in a domestic 600MW sub-critical turbo-generator set as the object of study,a 3Dsolid model was established using Solidworks software to comparatively analyze the vibration amplitude for the system with and without damping structures.Results show that the amplitude of torsional vibration decreases obviously in the shaft system with damping structures,and the maximum amplitude appears 0.2safter the excitation of a three-phase short-circuit fault;the damping structure could not only reduce the maximum value of torsional vibration,but also accelerate the attenuation of vibration amplitude,proving the damping structure to be effective in the suppression of torsional vibration in the shaft system.

关 键 词：汽轮发电机组 轴系扭振 减振结构 有限元分析 

分 类 号：TK268.1[动力工程及工程热物理—动力机械及工程]