摘要
结合某台机组运行过程中发生动静碰摩故障的数据,利用MATLAB小波变换功能对数据进行分析结果表明,发生局部碰摩和全周碰摩时,转子振动信号中均存在基频和倍频信号;局部碰摩波形存在突变,全周碰摩波形无突变。
Combined with the data of impact - rubbing between movable and stationary parts occurred in opera- tion process of one unit, the said data have been analysed by using MATLAB wavelet transformation function. Analysis of said data shows that the fundamental frequency signal and multiple frequency signal are existing in the rotor vibration signal whether in local impact- rubbing or in full arc impact- rubbing;in the wave shape of local impact - rubbing sudden changes have appeared, but in the waveshape of full arc impact - rubbing, sudden changes haven＇t appeared.
出处
《热力发电》
CAS
北大核心
2011年第8期17-21,共5页
Thermal Power Generation
关键词
汽轮发电机组
小波变换
动静碰摩
振动信号
频率
turbo - generator set
wavelet transformation
impact - rubbing between movable and stationary parts
vibration signal
frequency
