H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/29
H02K 9/06 (2006.01) F04D 25/08 (2006.01) F04D 29/30 (2006.01)
Patent
CA 2018816
A centrifugal fan for ventilated rotating machinery is provided having tapered fan blades to reduce sound pressure levels generated by fan operation over a wide speed range. The tapering of the fan blades keeps the cross-sectional area of each flow channel substantially constant as the air flows radially through the fan, resulting in a less turbulent flow. Each fan blade may include a height profile having a tapered segment in which blade height decreases in proportion to increasing radial distance from the central axis of the fan.
Ventilateur centrifuge destiné aux machines tournantes ventilées muni de pales de ventilateur biseautées pour réduire, sur une large gamme de vitesses, les niveaux de pression acoustique produits pendant le fonctionnement. Le taillage en biseau des pales de ventilateur maintient la section transversale du canal d'écoulement essentiellement constante au moment où l'air s'écoule radialement par le ventilateur, ce qui se traduit par un écoulement moins turbulent. Chaque pale de ventilateur peut avoir un profil vertical comportant un segment biseauté dans lequel la hauteur de la pale diminue en proportion de l'augmentation de la distance radiale à partir de l'axe central du ventilateur.
Ford Motor Company Of Canada Limited
Sim & Mcburney
LandOfFree
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