High efficiency mixer impeller

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

Patent

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Details

F04D 29/38 (2006.01) B01F 7/00 (2006.01) B01F 15/00 (2006.01)

Patent

CA 2048596

A high efficiency impeller has blades (20) which are formed of plate material. Each blade has a first span-wise bend (30) which extends generally parallel to the trailing edge (34) and through about the center of the blade meaasured cord-wise and extending the length of the blade from the root end to the tip end, and divides the blade into a back portion (42) and a front portion (40). The front portion (40) is further divided by a second bend line which extends from the intersection (45) of the first bend line (44) with the tip of the blade diagonally to the leading edge of the blade at a position (36) about one-fifth to one-third the span-wise length outwardly from the blade root.

Une palette d'agitation hautement efficace comporte des pales (20) composées de matière en plaque. Chaque pale présente une première courbure d'envergure (30) s'étendant en parallèle au bord arrière (34) et d'un côté à l'autre autour du centre de la pale, mesuré en profondeur, et prolongeant la longueur de la pale de l'extrémité de racine jusqu'au bout, et divisant la pale en une partie arrière (42) et une partie avant (40). La partie avant (40) est à nouveau divisée par une seconde ligne de courbure, laquelle s'étend à partir de l'intersection (45) de la première ligne de courbure (44), le bout de la pale étant en diagonale par rapport au bord avant de la pale au niveau d'une position (36) située à environ 1/5 à 1/3 de la longueur d'envergure, à l'extérieur de la racine de la pale.

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