F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
123/154, 230/18
F04D 19/00 (2006.01) B60K 11/04 (2006.01) F01P 5/02 (2006.01) F01P 7/02 (2006.01)
Patent
CA 1095476
FAN-SHROUD ARRANGEMENT Abstract of the Disclosure: The mechanism shown and described herein is a cooling fan and associated dual shroud arrangement including (1) a rota- ting shroud comprised of a ring secured to the outer tips of the fan blades and a bell-mouthed inlet formed on the leading edge of the ring, and (2) a stationary shroud secured at one end or edge thereof to the radiator and terminating at the other end thereof in an annular edge in front or upstream of the bell-mouthed inlet. A predetermined clearance is defined between the station- ary shroud and the bell-mouthed inlet, effective to provide a smooth recirculating airflow around the rotating shroud and back into the main airflow stream, thereby substantially eliminating tip-vortex characteristics and resultant tip-clearance noise, and without unsteady flow interactions that cause rotational noise. In one alternate embodiment, the radiator is used in lieu of the stationary shroud for cooperation with the bell-mouthed inlet.
305271
General Motors Corporation
Gowling Lafleur Henderson Llp
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