大型汽轮发电机组现场动平衡试验研究进展  

Research Progress of Field Dynamic Balancing Test of Turbo-Generator Units

作　　者：李卫军 吴文健 李东[2] 蔡文方 马思聪 刘若楠 LI Wejun;WU Wenjian;LI Dong;CAI Wenfang;MA Sicong;LIU Ruonan(Hangzhou Yineng Electric Technology Co.,Ltd.,Hangzhou 310014,Zhejiang,China;College of Intelligence and Computing,Tianjin University,Tianjin 300350,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,Zhejiang,China)

机构地区：[1]杭州意能电力技术有限公司,浙江杭州310014 [2]天津大学智能与计算学部,天津300350 [3]国网浙江省电力有限公司电力科学研究院,浙江杭州310014

出　　处：《电力大数据》2023年第2期79-85,共7页Power Systems and Big Data

摘　　要：对于高参数、高效率、复杂轴系的大型超临界汽轮发电机组,启停成本过高,提高轴系动平衡的精度与效率成为降低轴系动平衡的成本的关键要素。本文分析了转子不平衡故障机理与振动特征,梳理了基于振动信号处理及深度学习的轴系不平衡故障识别方法,并列举了多种轴系动不平衡量的计算方法,建立了现场轴系动平衡治理框架。该框架融合了转子不平衡识别、动平衡修正以及轴系动平衡的影响系数数据库的建立,以提高现场动不平衡识别精度。分析表明,高效动平衡能有效降低轴系振动,并成功应用于转子热弯曲、动静碰磨等多种故障预防中,提高汽轮发电机组的安全可靠性。同时,若加重量较大时,应采用高密度平衡块,能降低不平衡块的分散度,可进一步提高动平衡的效果。For large steam turbine generator units with high parameters,high efficiency and complex shaft system,the startstop cost is too high.Improving the precision and efficiency of shaft system dynamic balance becomes an important factor to reduce the cost of the shaft system dynamic balancing.The mechanism and vibration characteristics of the rotor unbalance fault were introduced,the identification method of the shaft system unbalance based on vibration signal processing and deep learning was sorted out,and several calculation methods of the shaft system dynamic unbalance were listed,the dynamic balance management framework of the on-site shaft system was established.This framework integrates rotor unbalance identification,dynamic balance correction and influence coefficient database of the shaft system dynamic balance to improve the accuracy of onsite dynamic unbalance identification.The analysis shows that the efficient dynamic balance can effectively reduce the vibration of shafting,and has been successfully applied to prevent a variety of fault prevention like the thermal bending of rotor and rubbing to improve the safety and reliability of the steam turbine generator units.At the same time,if the weight is large,the high density balance block should be used,which can reduce the dispersion of the unbalanced block and further improve the dynamic balance effect.Meanwhile,if the weight is larger,the high-density balance weight should be used,which can reduce the dispersion of the unbalanced weight and improve the effect of the dynamic balance.

关 键 词：汽轮发电机组 动平衡 信号处理 深度学习 故障诊断 

分 类 号：TK268.1[动力工程及工程热物理—动力机械及工程]