Discrimination of Vibration Phenomena on Model Turbine Rotor using In-Place Fast Haar Wavelet Transform

In this paper we present the results of applying the in-place fast Haar wavelet transform to visualization of vibration phenomena on a model turbine rotor. It is required to detect typical vibration of the turbine and the generator accurately. Modern power plants usually use one-high pressure and one or two lower pressure turbines. We made the model turbine with three rotors supported with journal bearings and simulated abnormal conditions. The vibrations accompanied by the abnormal conditions were measured with accelerometers, displacement meters and acoustic emission sensors. The acceleration signals were visualized in the time-frequency domain by the in-place fast Haar wavelet transform. The in- place fast Haar wavelet transform can clearly detect the components accompanied by the abnormal conditions.