Crack Detection System and Method of Diagnosis of Rotating Machinery

摘要

The present invention provides a simpler structure with a signal analyzer that can find the result of the reverse frequency response function using a complex modal testing method to detect the origin of cracks in a rotating rotor at an early stage. The present invention relates to a crack detection system of a rotating machine capable of performing accurate crack diagnosis and a diagnostic method thereof.;According to the present invention, in the crack detection system of a rotating machine that detects the cracks 21 generated in the rotors 11 and 12, excitation parts 210 and 211 which provide an excitation force so that the rotor 11 is excited. )Wow; A measurement unit (130, 140, 220) for measuring angle information, response and excitation force of the rotating body (11) excited by the excitation unit (210, 211); Random signal 108 for supplying the excitation signal to the excitation section (210, 211) and Fourier transform section (102, 103) Fourier transform (fourier transform) the signal input to the measuring section (130, 140, 220) A FFT and a signal analyzer 100 having a directional frequency response function 101 (dFRF) for obtaining a result of a reverse frequency response function required for diagnosing the crack 21 of the rotor 11, The directional frequency response function 101 of the signal analyzer 100 is attached with an alarm system 110 for generating an alarm by comparing the result of the reverse frequency response function with a set threshold. A detection system and diagnostic method thereof are provided.