METHOD OF GAS TURBINE DRIVES DIAGNOSTICS AT HIT OF FOREIGN OBJECTS ON THEIR INLET Russian patent published in 2009 - IPC G01M15/14 

FIELD: physics, measuring.

SUBSTANCE: invention concerns field of measuring technics, namely for increase of efficiency and efficiency of diagnostics of a technical state of the gas turbine drives in the course of their manufacture, trials and operation. On a drive inlet register the electrical signal generated by alien subjects, getting on a drive inlet. A signal is registered using the electrostatic continuous input antenna iterating a contour of an air inlet, sweepping all stream which is erected in a place of an articulation of an air inlet and the drive. Carry out the additional statistical analysis of the registered electrostatic signal from the electrostatic antenna erected in an air inlet, in a place of its articulation and the drive, calculate a variance σ_j on sample from N points on the given interval of time of τ registered electrostatic signal from the input antenna, compare the calculated value of variances of signals of input and target antennas to the given reference quantities σ* for input and target antennas. Determine current value of duration of the abnormal signal of the input antenna - parametre k. At an exit of quantities σ_j for the input or target antenna and quantity k from the given gamuts, the signal about presence dangerous or not the dangerous anomaly caused by intraimpellent processes of fracture or from hit on its inlet of alien subjects stands out. On value of quantity of parametre k judge duration of process of hit on an inlet of the drive of the alien subjects which long action can damage drive devices.

EFFECT: possibility to distinguish the anomalies caused by intraimpellent processes of fracture or from hit of alien subjects on an inlet of the drive, maintenance of a split-hair accuracy of recording of the charged subjects, both getting on a drive inlet, and the microparticles which are present at aviation impellent jet streams, raising thereby safety of operation of the drive.

3 dwg