FIELD: machine building.
SUBSTANCE: disclosed here method of diagnostics of self-oscillations of turbo-machine impeller consists in measurement of case vibration and in recording moment of self-vibration occurring upon reaching specified value of ratio of change of case vibration at diagnostics frequency to change of frequency of impeller rotation. As a feature distinguished from known, here there is observed the moment, when case vibration at diagnostics frequency, not multiple to rotation frequency of the impeller, reaches a specified threshold value; this is registered as the moment of self-oscillations occurrence.
EFFECT: raised efficiency and reliability of diagnostics of turbo-machine impeller self-oscillations.
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