Centrifugal fan with accumulating volute

Details Centrifugal fan with accumulating volute Centrifugal fan with accumulating volute

1990-10-26

1992-10-20

Kwon, John T.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

415206, F04D 2942

Patent

active

051565242

ABSTRACT:
Centrifugal blowers which maintain a substantially constant (usually .+-.5%) static pressure field around the circumference of the blower's impeller, notwithstanding at least one abrupt radial or axial discontinuity in the volute of the blower, e.g., due to one or more external axial and/or radial constraints in an irregularly shaped package. The blower accommodates such constraints by including discontinuities in the volute; therefore the blower takes advantage of relatively unconstrained segments of the package to have an overall large size. Notwithstanding the volute discontinuities, a substantially constant pressure field around the impeller is achieved by maintaining a specific relationship between G(.THETA.) and H(.THETA.), G(.THETA.) being radial extent of the volute as a function of the angular displacement .THETA. around the impeller's circumference and H(.THETA.) being the axial extent of the volute as a function of .THETA., angular displacement around the volute.

REFERENCES:
patent: 3301472 (1967-01-01), Dixon et al.
patent: 3407995 (1968-10-01), Kinsworthy
patent: 4448573 (1984-05-01), Franz
patent: 4919592 (1990-04-01), Sears et al.
WO90/09524 Aug. 1990 Martin.

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