CASING FOR CENTRIFUGAL FAN

PROBLEM TO BE SOLVED: To suppress noise by smoothing the flow of air flowing toward an impeller of a multiblade impeller internally mounted from a suction port of a casing. SOLUTION: The cross-sectional form of a bell-mouth provided at the peripheral edge of the suction port has a semicircular arc f...

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Bibliographic Details
Main Author NAGATA YOICHI
Format Patent
LanguageEnglish
Published 20.10.2005
Edition7
Subjects
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
NON-POSITIVE DISPLACEMENT PUMPS
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To suppress noise by smoothing the flow of air flowing toward an impeller of a multiblade impeller internally mounted from a suction port of a casing. SOLUTION: The cross-sectional form of a bell-mouth provided at the peripheral edge of the suction port has a semicircular arc face gradually reduced/enlarged within a range of approximately 180° from the outer surface of the casing, or a small circular arc surface gradually reduced within a range of approximately 90° from the outer surface of the casing and a large circular arc surface gradually enlarged communicating with the edge of the circular arc surface, or a circular arc surface gradually reduced within a range of approximately 90° from the outer surface of the casing and a conical surface gradually enlarged communicating with the edge of the circular arc surface. COPYRIGHT: (C)2006,JPO&NCIPI
Bibliography:Application Number: JP20040105664