Centrifugal fan with airfoil vanes in annular volute envelope

Details Centrifugal fan with airfoil vanes in annular volute envelope Centrifugal fan with airfoil vanes in annular volute envelope

1989-11-17

1990-08-07

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Vane or deflector

416223B, F04D 2944

Patent

active

049463489

ABSTRACT:
A rearwardly curved centrifugal blower having an annular envelope around the impeller, so that the rotating impeller draws air in through a central inlet and forces it radially outward into the envelope and out of an annular discharge. Multiple airfoil vanes are positioned in the annular envelope, in two axially displaced stages. The vanes are angled to turn and diffuse airflow entering the envelope.

REFERENCES:
patent: 2923461 (1960-02-01), Dallenbach
patent: 3117770 (1964-01-01), Campbell
patent: 3173604 (1965-03-01), Sheet et al.
patent: 3584968 (1971-06-01), Keith
patent: 3597117 (1971-08-01), Zoehfeld
patent: 3936225 (1976-02-01), Stjernstrom
patent: 4269571 (1981-05-01), Shikutani et al.

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