Single curvature fan wheel of a diagonal flow fan

Details Single curvature fan wheel of a diagonal flow fan Single curvature fan wheel of a diagonal flow fan

1980-06-20

1982-11-09

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Radially extending web or end plate

416DIG2, F04D 2930

Patent

active

043582443

ABSTRACT:
A blade of the fan wheel of a diagonal-flow fan, which blade should ideally have a shape of a twisted double curvature or undevelopable surface, is formed from a portion of a cylinder, which has a single-curvature or developable surface. To realize the formation of a blade from the single-curvature surface, lines of intersection between a cylinder and a number of coaxial imaginary conical surfaces representing streamlines in the fan wheel are used as a basis for design.

REFERENCES:
patent: Re20409 (1937-06-01), Hagen
patent: 416070 (1889-11-01), Pelzer
patent: 2054144 (1936-09-01), Swigert
patent: 2399852 (1946-05-01), Campbell et al.
patent: 2965287 (1960-12-01), Schug
patent: 3584968 (1971-06-01), Keith
patent: 3668887 (1972-06-01), Riello
patent: 4093401 (1978-06-01), Gravelle
patent: 4218190 (1980-08-01), Nishikawa et al.
patent: 4227868 (1980-10-01), Nishikawa et al.
patent: 4274810 (1981-06-01), Hishikawa

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