摘要
介绍了一台国产300MW机组通流改造后突发性低频振动现象,通过具体的振动试验分析诊断为高中压转子发生汽流激振故障。在明确故障类型和原因后果断采取整改措施,包括:改变轴承供油方式增加阻尼,减小轴瓦工作面增大比压,封堵上瓦乌金槽起到类似减小轴瓦顶隙的作用,有效提高了高中压转子-轴承系统的稳定性,消除了低频振动分量。故障处理思路及具体改造措施可为大型机组在处理同类型故障时提供技术参考。
Low-frequency vibration after retrofitting flow path of 300MW domestic steam turbine was described in this paper, the steam-excited fault was affirmed by vibration test. The treatments of changing the oil supply line, decreasing the bearing working area, plugging the gold slot of up-bearing eliminate the low-frequency and improve the stability of the systems. These strategies and techniques have practical application value in promoting the technology of similar vibration faults for turbo-generator units with large capacity.
出处
《汽轮机技术》
北大核心
2016年第1期69-71,共3页
Turbine Technology
基金
国网浙江省电力公司科技项目资助(5211DS14005B)
关键词
通流改造
汽流激振
稳定性
低频振动
retrofitting flow path
domestic steam
stability
low-frequency vibration
