基于HB-AFT方法的水轮发电机组转子-轴承系统振动特性分析  

Vibration Characteristics Analysis of Rotor-bearing System of Hydrogenerator Set Based on HB-AFT Method

作　　者：汪广明 何滔 熊玺 李峰 WANG Guangming;HE Tao;XIONG Xi;LI Feng(State Energy Dadu River Shaping Power Generation Co.,Ltd.,Leshan 614304,China;School of Information Engineering,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]国能大渡河沙坪发电有限公司,四川乐山614304 [2]西南科技大学信息工程学院,四川绵阳621010

出　　处：《机械制造与自动化》2024年第6期103-106,共4页Machine Building & Automation

摘　　要：水轮发电机组在运行过程中会发生水轮机水力振动状况,形成突出特征的轴系振动故障。为了进一步分析发电机组转子-轴承系统振动特性,设计一种基于HB-AFT方法的振动信号分析方法。研究结果表明:周期运动结果跟R-K方法计算结果达到了良好吻合度,大幅缩短运算时间,实现了更高的控制精度并达到省时的效果,表明HB-AFT方法可以满足发电机组转子-轴承系统的精确周期分析。选择HB-AFT方法进行解析的结果形成了与R-K方法相近的轨迹。处于某些轴颈间隙下时,系统表现为不稳定的变化特征,从而实现分岔结果。该研究可以拓宽到其它传动设备的振动信号分析领域,具有很宽的应用价值。In the operation of hydro-generator set,the hydraulic vibration of turbine may occur,leading to the shaft vibration fault with prominent characteristics.In order to further analyze the vibration characteristics of rotor-bearing system of generator set,a vibration signal analysis method based on HB-AFT method is designed.The research results show that the results of periodic motion are in good agreement with those calculated by R-K method,the calculation time is significantly shortened,the higher control accuracy is achieved and time is saved.The results show that HB-AFT method can satisfy the accurate period analysis of rotor-bearing system of generator set.The result of HB-AFT method is similar to that of R-K method.Under certain journal clearance,the system manifests unstable change characteristics,thus achieving bifurcation results.This research,with a wide range of application value,can be extended to the vibration signal analysis field of other transmission equipment.

关 键 词：水轮发电机组 转子-轴承系统 振动特性 HB-AFT方法 

分 类 号：TH133.3[机械工程—机械制造及自动化]