Fan for cooling electric machine - has drum rotor with dividing wall parallel to cover disc, and inlet vanes to produce vortex-free axial flow

摘要

The large capacity radial fan is formed as a drum rotor, the dividing wall of which is positioned parallel to the cover disc of the rotor. An additional inlet vane is positioned in the interior, concentric to an outer vane, so that the radially incoming medium is deflected vortex-free into an axial direction. The inner vane is positioned on the axial outer casing. The cover disc defines a spacing less than 5% of the rotor dia. with the dividing wall and the fan has a short axial length.