DIAGNOSTIC OF PUMP UNIT ELECTRIC DRIVE Russian patent published in 2013 - IPC F04B51/00 G01M15/12 

FIELD: engines and pumps.

SUBSTANCE: at least, three vibration detectors are installed in axis of pump unit electric drive to estimate conditions of foundation. First, frequency first harmonic of foundation intrinsic vibrations is determined. Simultaneously, amplitudes of foundation horizontal vibrations are measured in said frequency to be compared to tolerable value A_0tol. In case current amplitude at i_th point exceed said A_0tol.value and observed are conditions A_0i-1<A_0i>A_0i+1, where A_0i and A_0i+1 are amplitudes of foundation horizontal vibrations in adjacent i_-1 and i₊₁ measurement points, electric drive is switched off. In area between i_th and i_-1 measurement points and between i_th and i₊₁ measurement points foundation body is checked for defects, damages and cracks to estimate state of foundation and safety of its further operation or necessity in repair.

EFFECT: safe operation, timely prevention of failures.

8 cl, 3 dwg