Experimental Research Of Condition Monitoring For Steam Turbine Blade Vibration

In this thesis the actuality and development of monitoring blade vibration inChina and other countries is summarized. In order to get the vibrant amplitude andfrequency of a turbine blade, a method capable of measuring each blade in a rotating row thatcalled tip-timing measurement is presented in this paper. The method offers some uniqueadvantages over traditional strain-gage method. Only two sensors over the top of blades andone synchronous sensor of the rotor aye used to get the exact vibrant amplitude and frequencyof the each blade in a rotating row, and at the same time more exact results are obtained andthe life of the system is prolonged. Moreover a high accuracy system of vibrationmeasurement on rotational blade has been developed in this dissertation, and a frequencycompute program is compiled. The validation and well foreground of the method is verifiedby an experiment.