Experimental Research on Steam-Turbine Rotor Vibration Fault Diagnosis Based on the Fractal Box Counting Dimension

The rotor is the main component during turbine fault forecasting and diagnosing.Vibration signal and state parameter are usually selected as the monitored signals to equipment diagnosis.The steam-turbine vibrating is experimentally simulated on the Bently facility.Using box counting dimension method the different type of turbine fault with fractal characteristic is numerically researched.The result shows that the axis track under mass unbalance is smooth and its box counting dimension reaches the small-est.The axis track under friction presents disorder and its box counting dimension is the largest.The box counting dimension of un-countershaft and loosing are in the middle.As a result,the box counting dimension possesses better distinguish during steam-turbine rotor fault type diagnosing.