FIELD: machine building.
SUBSTANCE: invention relates to power equipment engineering and can be used during centrifugal pumps state technical diagnostics. Method of pump efficiency determining includes working fluid pumping through pump, establishing pump operating mode with rated head, pumped working fluid part sampling and throttling until inlet pressure, fluid pressure measurement at pump inlet and outlet, fluid temperature measurement at pump inlet and in throttled flow and calculation of efficiency according to measured parameters. At that, pumped fluid inlet temperature measurement is downstream of bypass pipeline connection point.
EFFECT: invention is aimed at increasing accuracy of pump technical condition evaluation during its efficiency determination.
1 cl, 1 dwg
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