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

1982-12-07

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, F04D 2930

Patent

active

043624685

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: 2284141 (1942-05-01), Funk
patent: 2847156 (1958-08-01), Bleier
patent: 3102679 (1963-09-01), Rudy
patent: 3168048 (1965-02-01), Toyokura et al.
patent: 3515498 (1970-06-01), Tomita
patent: 3584968 (1971-06-01), Keith
patent: 3727593 (1973-04-01), Enke
patent: 4218190 (1980-08-01), Nishikawa et al.
patent: 4227868 (1980-10-01), Nishikawa et al.
patent: 4274810 (1981-06-01), Nishikawa

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