DEVICE FOR DIAGNOSTICS OF SELF-VIBRATIONS OF TURBO MACHINE ENGINE DISK Russian patent published in 2008 - IPC G01M15/14 

FIELD: engineering industry; power-plant enginnering.

SUBSTANCE: there is signal-conditioner box, first and second amplitude detector, threshold device and comparator, which lead to the device of diagnostics of self-vibrations of turbo machine engine disk containing two active tunable band pass filters, AND circuit with the outlet connected to the indicator through a matching amplifier. The first device inlet is the first tunable active bandpass filter information inlet, and the second one is the signal-conditioner box inlet, and the third device inlet is the second tunable active bandpass filter information inlet, the driving points of the first and second tunable bandpass filters being connected to each other and to the first signal-conditioner box outlet, which has its second outlet connected to the threshold device driving point; the first tunable active bandpass filter outlet is connected through the first amplitude detector to the threshold device information outlet, which in turn is connected with its outlet to one of the AND circuit outlets; the second active tunable bandpass filter is connected to another AND circuit inlet through the cascade connection of the second amplitude detector and the comparator circuit; the second comparator circuit is connected to the reference-voltage source, and the device outlet is connected to the matching amplifier outlet.

EFFECT: effectiveness and reliability increase of diagnostics of self-vibrations of turbo machine engine disk vanes in real time mode.

3 cl, 3 dwg