Radial pump operating noise and casing-vibration analyses

V prispevku je podana teoretična in eksperimentalna študija dinamičnih tekočinskih vibracij in hrupa. Eksperimentalne meritve so izvedene na enostopenjski radialni črpalki, ki obratuje s čisto hladno vodo. Pri različnih obratovalnih režimih (vrtalnih frekvencah rotorja) so izvedene meritve naslednnjih obratovalnih karakteristik: dušilna krivulja, pretok - izkoristek, pretok - obratovalni hrup in pretok - amplituda vibracij okrova. Rezultati meritev so podani v časovnem in frekvenčnem prostoru.This paper surveys theoretical and experimantal studies of fluid mechanic vibration and noise. The experimental measurements were carried out in a radial one-stage pump which operates with clean cold water. Several experimental measurements were carried out on a radial one-stage pump which operates with clean cold water. Several experimental measurements on the operating characteristics such as capacity-head, capacity-efficiency, capacity-operating noise and capacity-pump casing vibration amplitudes under different operating regimes (different impeller speed) were performed. Measurement results are given in time and frequency domains