Patent ID: 9546661
Date: 2017-01-17
CPC Classifications: F04D,F05D

Claim:
1. A rotor machine configured to function as a liquid pump or as an agitator in a fluid, the rotor machine comprising: a pump casing with an impeller mounted in bearings in a manner that allows rotation around an axis (X), an axial suction inlet with a defined area of opening (Ain); a radial pressurised outlet with a defined area of opening (Aut); and a series of radially extending blades that, distributed around a circumference of the impeller, form between them a number (n) of flow channels that each has a nominal cross-sectional area (Avs) and which channels together form a total nominal area of opening (Atot-impl) through the impeller, wherein the rotor machine has three principal flow pathways (Ain, Aut, Atot-impl), the area of opening (Ain) of the suction inlet, the area of opening (Aut) of the pressurised outlet and the total nominal area of opening (Atot-impl) of the flow channels that extend through the impeller are mutually designed such that a ratio of areas of opening between any two of the three principal flow pathways (Ain, Aut, Atot-impl) of the rotor machine lies in a range of 0.9-1.1.