Flat-bladed fan wheel of diagonal-flow fan

Details Flat-bladed fan wheel of diagonal-flow fan Flat-bladed fan wheel of diagonal-flow fan

1978-04-26

1980-08-19

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

416188, 416DIG2, 416DIG3, F01D 522

Patent

active

042181909

ABSTRACT:
A blade in the fan wheel of a diagonal-flow fan, which blade should ideally have the contoured shape of a twisted double-curvature or undevelopable surface, is formed from a portion of a plate which has a flat planar surface. To develope the flat blade shape from a planar surface, lines of intersection between a plate and the streamsurfaces in the ideal fan wheel, which are represented by a number of coaxial imaginary conical surfaces, are used as a basis for design. The realized flat blade can then be orientated between the frustoconical main and side plates to form a diagonal-flow path similar in performance to the ideal blade of a twisted double-curvature surface.

REFERENCES:
patent: 416070 (1889-11-01), Pelzer
patent: 2054144 (1934-07-01), Swigert
patent: 3224079 (1965-12-01), Dybvig
patent: 3440969 (1969-04-01), Kondo
patent: 3584968 (1971-06-01), Keith
patent: 3668887 (1972-06-01), Riello
patent: 4120609 (1978-10-01), Chou et al.

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