Single-curvature fan wheel of diagonal-flow fan

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

1978-01-25

1980-10-14

Powell, Jr., Everett 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, F04D 2930

Patent

active

042278686

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: 416070 (1889-11-01), Pelzer
patent: 2054144 (1936-09-01), Swigert
patent: 2399852 (1946-05-01), Campbell et al.
patent: 2415847 (1947-02-01), Redding
patent: 2965287 (1960-12-01), Schug
patent: 3168048 (1965-02-01), Toyokura et al.
patent: 3334807 (1967-03-01), McMahan
patent: 3515498 (1968-09-01), Tomita
patent: 3584968 (1971-06-01), Keith
patent: 3727593 (1973-04-01), Enke
patent: 3936225 (1976-02-01), Stjernstrom
patent: 4012168 (1977-03-01), Spellman

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