MODE AND ARRANGEMENT FOR ACOUSTIC CONTROL OF MONOLITHIC DISKS OF THE ROTOR OF A TURBO-MACHINE Russian patent published in 2006 - IPC G01N29/00 

FIELD: the invention refers to a frequency control of monolithic bladed disks according to their vibrator acoustic characteristics.

SUBSTANCE: the essence is in that the disk is set in rotation. Each blade on the disk is exposed to stimulation. Its acoustic response is checked and a corresponding electrical signal is generated. According to Fourier's method of rapid transformation its frequency response is determined. The electric signal and corresponding frequency response are memorized. The characteristic frequencies for each blade of the disk are determined. The disk is either accepted or rejected as defective depending on whether the obtained distribution of frequencies coincides with the preliminary defined set of prohibited frequency distributions. An additional stage is also envisaged for identification of the blade's defects by way of comparing its frequency response with preliminary defined frequency responses which are characteristic for standard defects.

EFFECT: increases efficiency and rapid operating speed of control, provides possibility of carrying on the control online and during the process of definition of the type of the defect.

7 cl, 2 dwg