高速透平发电机轴向碰摩故障的试验  

Experimental Study on Axial Rub-impact Fault of a High-speed Turbine Generator

作　　者：边技超[1] 付忠广[1] 杨金福[2] 于明涛[1] 王正威[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]中国科学院工程热物理研究所,北京100190

出　　处：《噪声与振动控制》2015年第3期149-152,162,共5页Noise and Vibration Control

基　　金：国家科技支撑计划项目(2012BAA11B02);中央高校基本科研业务费专项资金资助(13XS10);中央高校基本科研业务费专项资金项目(2014ZZD04)

摘　　要：采用气体静压径向—止推联合轴承支承的双止推面、四磁盘结构轴承—转子系统对高速透平发电机出现的轴向碰摩故障展开试验研究。分析时间三维谱图、频谱结构、轴心轨迹等给出了由于轴向力变化导致的轴向碰摩的典型特征,并分析轴向碰摩产生的机理、发展过程及解决措施。试验结果表明,由于轴向力变化导致的轴向碰摩一般伴随着转速突降、轴心轨迹突变及频谱结构存在较宽工频频带等故障特征。试验结果能够为轴向碰摩故障的在线监测、模式识别及故障诊断提供参考。The axial rub-impact fault of a high-speed turbine generator was studied. The high-speed aerostatic bearingrotor system with the structure of single span and four disks was considered. The time-frequency-amplitude waterfall diagrams, spectrum structure and shaft center trajectory were analyzed to obtain the typical features of the axial rub-impact caused by the change of axial forces. The mechanism, development process and improvement measures of the axial rub-impact were analyzed. Experimental results show that the axial rub-impact is usually accompanied by sudden speed drop and sudden change of the shaft center trajectory, and wide working frequency band. The experiment may provide a reference for on-line monitoring, pattern recognition and fault diagnosis for axial rub-impact of turbine generators.

关 键 词：振动与波 机械学 透平发电机 轴向碰摩 故障诊断 

分 类 号：TH113.1[机械工程—机械设计及理论]