Diagonal-flow fan wheel with blades of developable surface shape

Details Diagonal-flow fan wheel with blades of developable surface shape Diagonal-flow fan wheel with blades of developable surface shape

1980-12-08

1983-08-30

Hornsby, Harvey C.

Fluid reaction surfaces (i.e., impellers)

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

Radially extending web or end plate

416242, F04D 2928

Patent

active

044014104

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 combination of a cylindrical plate and a planar plate tangent to the cylindrical plate or of a combination of a pair of mutually circumscribing cylindrical surfaces, which portion constitutes a developable surface. To realize the formation of a blade from the developable surface, lines of intersection between combined cylinder and planar plates or combined cylinders and a number of coaxial imaginary conical surfaces representing streamlines in the fan wheel are used as a basis for design.

REFERENCES:
patent: 1341882 (1920-06-01), Criqui

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