Patent ID: 8932019
Filing Date: 2015-01-13
Classification: F04D,F05D,Y10S

Abstract:
1. A fan wheel in the form of a radial or diagonal fan, comprising a top plate with an inlet port, a base plate, and a plurality of fan blades arranged so as to be distributed around the inlet port and around an axis of rotation, as well as blade ducts between adjacent fan blades, said blade ducts leading from an inner region proximate to the inlet port radially or diagonally outward and forming blowout-ports in an outer region, the blade ducts, with respect to their effective flow cross-section being configured large enough to achieve a turbulent flow with a Reynolds number significantly larger than 2300 during operation, wherein at least one of the top plate and base plate has a profile with a rotationally asymmetrical geometry and with axial deviations forming a continuous contour in a circumferential direction at least across each fan blade, the rotationally asymmetrical geometry has a mathematically continuous contour in a direction parallel to the axis of rotation, wherein at least one of the top plate and the base plate has a wavy configuration, wherein a convex, outward curving section is formed between two adjacent fan blades and wherein in locations of the fan blades, two respectively adjacent, outward curving convex sections form mathematically continuous transitions between each other.