Blade for axial flow fan
AssigneeTecsis Technologia E Sistemas Avancados Ltda
InventorOdilon Antonio Camargo Do Amarante
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Abstract
The present invention describes an axial flow fan blade that presents innovation on its shape that results in a lower noise emission and in a higher efficiency. The axial flow fan blade, object of the present patent, has a lower vortex emission than the blades available on the previous art. This lower vortex emission is responsible for a lower level of pressure fluctuations, which results in a lower noise emission, and is also responsible for a lower energy expense on the vortex formation, which results in an efficiency increase. The present axial flow fan blade can be employed in various applications where it is necessary to move any gas.
Claims1
A blade for axial flow fan to move any gas consisting of a leading edge (2), a trailing edge (3), a pressure side (7) and a suction side (8) such that each transversal section of the blade has the shape of an aerodynamic profile, the twist angle θ of each section varies along the blade span from a larger angle θroot in the root (5) region of the blade to a smaller angle θtip in the tip (6) region of the blade, wherein the leading edge (2) and trailing edge (3) are defined by line segments which form given angles between one and the other in such a way that protuberances 11 and re-entrances 12 are formed in the leading edge (2) and trailing edge (3).
Dependencies are inferred from the claim text.