Specification of Impeller/Radial impeller/Mixed flow impeller /Axial flow impeller/Peripheral impeller /Closed single-vane impeller/impeller with cylindrical vanes
An impeller is a rotating component equipped with vanes or blades used in turbomachinery (e. g. centrifugal pumps). Flow deflection at the impeller vanes allows mechanical power (energy at the vanes) to be converted into pump power output.
In accordance with EUROPUMP TERMINOLOGY and DIN 24250, a distinction is made between counter-clockwise and clockwise impellers, as viewed in inlet flow direction.
Depending on the fluid flow pattern in multistage pumps and the impellers' arrangement on the pump shaft impeller design and arrangements are categorised as: single-stage, multistage, single-entry, double-entry, multiple-entry, in-line (tandem) or back-to-back arrangement. Typical impeller arrangements are illustrated in Figs. 17 to 19 Impeller.
Depending on the flow line pattern in the impeller (especially in the outer impeller diameter area), impellers are subdivided into the following types:
Impeller types
Radial impeller See Figs. 1, 2 Impeller
Mixed flow impeller See Figs. 3, 4, 6 Impeller
Axial flow impeller See Figs. 5 Impeller
Peripheral impeller See Figs. 15 Impeller
