F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 27/00 (2006.01) F04D 29/28 (2006.01) F04D 29/66 (2006.01)
Patent
CA 2115111
IMPELLER FOR TRANSVERSE FAN ABSTRACT A transverse fan impeller (30) having at least two modules (32). Each module is defined by an adjacent pair of partition disks (34) each perpendicularly centered on the rotational axis of the impeller. Blades (31) extend longitudinally between pairs of partition disks. The angular spacing of blades in a module is nonuniform but also not random, being determined by application of cer- tain formulae disclosed. The angular blade spacing with- in each module of the impeller is the same, but the mod- ules are angularly offset so that a blade in one module is offset from the corresponding blade in an adjacent module by a predetermined value. The module and blade configurations reduce both the blade rate tonal noise and overall radiated noise produced as compared to an impel- ler having uniformly spaced blades.
Amr Yehia M.
Bushnell Peter R.
Carrier Corporation
Gowling Lafleur Henderson Llp
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