汽轮发电机组轴系支撑系统连接刚度不足引起轴承座振动分.PDF

内蒙古电力技术 2018 年第36 卷第5 期 INNER MONGOLIA ELECTRIC POWER 23 doi:10.3969/j.issn. 1008-6218.2018.05.006 汽轮发电机组轴系支撑系统连接刚度不足 引起的轴承座振动分析 俎海东，朱生华，李晓波，焦晓峰 （内蒙古电力科学研究院，呼和浩特 010020 ） 摘要：以某汽轮发电机组为例，对轴承座振动大的原因进行分析。根据外部振动特性试 验结果及轴振波德图，判断其原因为轴承座基础与台板、台板与轴承底座之间存在接触不良、 连接刚度不足的问题。重新加装垫铁、增加垫铁数量，重新研刮台板、更换垫片后，轴承座振 动达到合格水平。 关键词：汽轮机；轴系支撑系统；连接刚度；轴承座；振动 + 文献标志码：B 中图分类号：TK268 .1 文章编号：1008-6218（2018 ）05-0023-04 Analysis of Vibration Problems Caused by Insufficient Joint Stiffness of Bearing Block of Steam Turbine Generator Set ZU Haidong, ZHU Shenghua, LI Xiaobo, JIAO Xiaofeng （Inner Mongolia Power Research Institute, Hohhot 010020, China） Abstract ：Taking a steam turbine generator set as an example, analyze the reasons for the large vibration of the bearing block. According to the test results of external vibration characteristics and the wave diagram of shaft vibration, it was judged that the reasons were the bad contact between the bearing block foundation and the platform, the platform and the bearing base, and the insufficient connection stiffness. The vibration of the bearing seat reached the qualified level after reinstalling the pad iron, increasing the number of pad iron, relapping the table plate and replacing the pad. Key words ：steam turbine; shafting support system; connection stiffness; bearing block; vibration 0 引言 位置，保证转子中心与汽缸中心一致，保持转子与