F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
230/24, 230/4, 2
F04D 29/40 (2006.01) F04D 29/42 (2006.01) F04D 29/44 (2006.01)
Patent
CA 1213862
ABSTRACT OF THE DISCLOSURE A radial fan comprises a spiral-shaped fan housing and a drum-shaped wheel which rotates in the direction which the spiral increases and has an opening facing towards an intake in the end wall of the housing. The area of the duct formed by the housing and the periphery of the wheel increases continuously from a point where the duct cross-section is smallest up to an outlet part where the cross-section is greatest and where the area is at least equal to the radius of the wheel times its length. The intake is made eccentric by a guide vane installed at the opening and extending near the inside of the wheel by an edge part located after the said point, cutting off the cross-section of the duct outwardly of the outer end of the wheel. The rear face of the guide vane and the end wall form an inwardly facing flow surface which extends over approximately half the periphery of the wheel. The wheel length is approximately two thirds or more of the internal axial dimension of the housing, and is approximately equal to the radius of the wheel.
419888
Marks & Clerk
Wallman Lennart
LandOfFree
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