摘要
为解决某电厂主蒸汽管道高负荷时振动问题,并寻求解决该管系振动故障方法,采用检查、试验、仿真相结合的管道振动多元化分析及定制化治理技术路径,通过现场检查与试验发现管道内温度测点套管引发了圆柱绕流现象,并产生低频激扰力,实测及模态仿真结果表明主蒸汽管系刚性偏弱,两因素叠加作用下导致了管道出现低频冲击共振故障。移除管道异常结构,瞬态振动波动故障消失,调整支吊架系统增加管系刚性及阻尼等针对性治理工作,振动速度从39.8 mm/s降低至10.2 mm/s,消除了管道振动故障。
To solve the vibration problem in the high-load steam pipeline of a certain power plant and seek solutions for the vibration fault in the pipe system,a diversified analysis and customized treatment technology path for pipeline vibration is adopted,combining inspection,testing,and simulation.Through on-site inspection and testing,it was found that the thermocouple sleeve inside the pipeline caused circular cylinder flow phenomenon and generated low-frequency exciting force.Measurement and modal simulation results showed that the main steam pipe system had weak rigidity,and the combination of these two factors resulted in low-frequency impact resonance fault in the pipeline.By removing the abnormal structure of the pipeline,the transient vibration fluctuation fault disappeared.Targeted treatment work was carried out,including adjusting the support and hanger system to increase the rigidity and damping of the pipe system.As a result,the vibration velocity was reduced from 39.8 mm/s to 10.2 mm/s,effectively eliminating the pipe vibration fault.
作者
林乐平
李小武
赖勇能
刘明
杨加瑶
LIN Leping;LI Xiaowu;LAI Yongneng;LIU Ming;YANG Jiayao(JXIC Energy Tech.Research Institute Co.,Ltd.,Nanchang 330096,China;Xingguo County Huagan Environment Co.,Ltd.,Ganzhou 342400,Jiangxi,China)
出处
《能源研究与管理》
2023年第4期188-194,共7页
Energy Research and Management
基金
江西江投能源技术研究有限公司科技项目“火电机组旋转机械与管道振动传递特性及分布式减振技术研究”(NYYJKJXM-004)。
关键词
管道
圆柱绕流
模态分析
低频冲击共振
支吊架
pipeline
circular cylinder
modal analysis
low-frequency impact resonance
support and hanger systems
