Axial fan

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

Patent

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Details

F04D 29/38 (2006.01)

Patent

CA 2572925

An axial fan (1) rotating in a plane (XY) about an axis (2) comprises a central hub (3), a plurality of blades (4), which have a root (5) and a tip (6), the blades (4) being delimited by a convex leading edge (7) and by a concave trailing edge (8), their projections in the fan rotation plane each being formed by circular arc segments; the blades (4) are made from sections with aerodynamic profiles, each with decreasing length and more curved from the perimeter to the hub.

L'invention concerne un ventilateur axial (1) tournant dans un plan (XY) autour d'un axe (2) comprenant un moyeu central (3), une pluralité de pales (4), lesquelles présentent un pied (5) et une extrémité (6), les pales (4) étant délimitées par un bord avant convexe (7) et par un bord arrière concave (8), leurs parties saillantes dans le plan de rotation du ventilateur étant chacune constituée de segments d'arc circulaire; les pales (4) sont constituées de quatre parties ayant des profils aérodynamiques, chacune ayant une longueur décroissante et une courbure croissante depuis le périmètre jusqu'au moyeu.

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