发电机转子超速动平衡试验台加固分析  

Strengthening Analysis of Dynamic Balancing Tester for Electric Generator Rotors

作　　者：宣伟慧[1] 汪崖 晏金炜[1] 

机构地区：[1]上海市机电设计研究院有限公司,上海200040

出　　处：《结构工程师》2011年第6期113-116,共4页Structural Engineers

摘　　要：因产品更新需要,发电机厂对动平衡试验台进行了改造,改造计划目标能完成60万千瓦的发电机转子动平衡试验。经改造后,转子的轴振、瓦振及基础振幅都严重超标,致使动平衡试验无法继续进行。经动力特性测试及有限元分析,得出超标主要原因为新老混凝土结合面脱开及原有基础刚度略显不足。采取凿除原有结合不佳的混凝土基础部分进行重新浇筑,并在底部局部加厚增加质量和刚度的加固方案。对加固后的结构模型进行了多工况的动力响应时程分析,分析结果显示,加固后的基础结构能满足业主要求的各种转子的动平衡试验。To meet the need of products updates,a generating plant rebuilt the dynamic balancing tester.The vibration amplitude was above-norm severely after rebuilding,resulting in the balancing test could not be continued.The main reasons are that the new old concrete could not work together well,and the stiffness of the existing foundation was not enough.The foundation was reinforced by removing the concrete which was not well cast,increasing the thickness of the foundation.Result of dynamic time-history analysis showed that after reinforcement the foundation structure can meet the requirements of various rotor dynamic balance tests.

关 键 词：动平衡试验 加固分析 时程分析 动力特性 

分 类 号：TU375[建筑科学—结构工程]