Patent ID: 7794206
Filing Date: 2010-09-14
Classification: F04D,F05D

Abstract:
1. A radial fan impeller, in particular for using in gas fans with a steep fan characteristic curve, with the following features: a plurality of blades distributed around the periphery; wherein the blades extend from an inner inlet region to an outer discharge region in a radial direction; the blades extend in an axial direction parallel to a direction of a rotation axis between an inlet side and an axially opposite hub side; the blades are connected on the inlet side by means of their radial extension as far as the discharge region to a covering disc which has a central inflow opening out into the inlet region; the blades are only connected on the hub side by their radial inner end regions to a central hub; the blades and the covering disc define an outer fan impeller diameter which is at least ten times an axially measured flow discharge width of the blades provided in the discharge region; and each blade has an overall length in the axial direction which is less than an overall length in the radial direction.