MEASURING APPARATUS OF VIBRATION FREQUENCY FOR BLADE OF GAS TURBINE

摘要

PURPOSE: A measuring apparatus for vibration frequency of a blade of a gas turbine prevent rapid damage of the turbine due to resonance phenomena by avoiding accord of natural frequency of the turbine and the blade. CONSTITUTION: A measuring apparatus for vibration frequency of a blade of a gas turbine includes a holding fixture(104) and a sensor. The holding fixture is formed to have a complementary shape as a dovetail of the gas turbine to clamp the dovetail. The sensor measures vibration frequency of the blade of the gas turbine. The holding fixture includes a stopper, a push rod and a hydraulic ram(108). The stopper limits a movement of the dovetail. The push rod pushes the other side of the dovetail until one side of the dovetail adheres to the stopper. The hydraulic ram pressurizes an end of the dovetail to be stuck to the holding fixture. A sensor frame(111) fixes the sensor to measure vibration frequency. A vibroisolating pad(107) is included to minimize influence of noise and vibration.