US 2011/0211963 A1 · RADIAL OR DIAGONAL FAN WHEEL

Abstract

A fan wheel (1) is designed as a radial or diagonal fan, comprising a top plate (2) with an inlet port (4), a base plate (6) and a plurality of fan blades (8) distributed around the inlet port (4) and around an axis of rotation (Z). Blade ducts extend (10) respectively between the adjacent fan blades (8). The blade ducts lead radially or diagonally outward from the area of the inlet port (4) and form blow-out ports in the outer region. The blade ducts (10) are designed, with respect to their effective flow cross-section, as large enough that during operation, a turbulent flow with a Reynolds number markedly greater than 2300 is achieved. The top plate (2) or the base plate (6) or both feature a rotationally asymmetrical geometry with a continuous profile, at least in angular sections encompassing the fan blades (8).

Claims13

Dependent claims

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.

Dependencies are inferred from the claim text.

Radial or diagonal fan wheel

Life of this patent

Radial or diagonal fan wheel

Life of this patent

Abstract

Claims13