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    • 3. 发明专利
    • BR9705119A
    • 1998-09-22
    • BR9705119
    • 1997-10-22
    • AMETEK INC
    • SHAWCROSS JAMES PCICCARELLI ROBERT A JRGILLILAND MICHAEL L
    • F24F7/00H02K9/04A47L5/22F04D17/16F04D29/44H02K5/20
    • A fan end bracket (14) for a motorized fan assembly has a plurality of curvilinear tapered air passages (29). Each air passage includes a flow port (30) such that air being moved by a rotating fan assembly is directed through the air passages and the flow ports. A skeletal motor assembly (12) is affixed to one side of the end bracket such that the motor shaft (16) is disposed through a shaft aperture in the end bracket. A rotating fan member (15) is affixed to the motor shaft adjacent to the other side of the end bracket. A shroud member (19) is provided to shroud the rotating fan member so as to cause the flow of air to be directed through the air passages. A baffle plate (18) is interposed between the rotating fan member and the end bracket. The baffle plate includes a plurality of curvilinear scallops (40) which correspond to the air passages in the end bracket. An effective flow port is created between the scallops of the baffle plate and the tapered ramp surfaces (28) of the end brackets so the size of the effective flow port may be adjusted by merely changing the baffle plate so as to optimize the flow and pressure parameters of the fan for a particular motor size.