Radial fan wheel, fan unit, and radial fan arrangement

F - Mech Eng,Light,Heat,Weapons – 04 – D

Patent

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Details

F04D 29/28 (2006.01) F04D 29/44 (2006.01)

Patent

CA 2517994

The invention relates to a radial fan wheel comprising vanes (2) which are inclined against the rotational direction (R) (radial impeller inclined towards the rear), the outer edge regions (14, 7) of the top and bottom disks (3, 1) projecting past the effective diameter (DSa) of the vanes. The diffusion space thus established between the bottom and top disks (1, 3) and the effective and outer diameter (DAs, DN) of the vanes enables the kinetic energy of the fluid to be effectively converted into a pressure potential (conversion of the kinetic pressure into static pressure). The cross-section of the diffusion space is thus embodied in such a way that it expands radially outwards in a rectangular or trapezoidal manner.

L'invention concerne une roue de soufflante radiale comprenant des pales (2) inclinées contre le sens de rotation (8) (rotor radial incliné en arrière), dans lesquelles les bords extérieurs (14, 7) sortent de la plaque couvercle et de la plaque de base (3, 4) par l'intermédiaire du diamètre (DAs) de sortie des pales. Le diamètre extérieur et de sortie des pales (DAs, DN) de la chambre de diffusion produite par la roue de soufflante, situé entre la plaque couvercle et la plaque de base (1, 3) permet une transformation efficace de l'énergie cinétique du fluide en potentiel de pression (transformation de la pression cinétique en pression statique). Le profil en coupe transversale de la chambre de diffusion est rectangulaire ou de forme trapézoïdale, et il s'élargit vers l'extérieur de manière radiale.

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