Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Upstream of runner
Patent
1978-09-06
1981-03-03
Casaregola, Louis J.
Rotary kinetic fluid motors or pumps
Selectively adjustable vane or working fluid control means
Upstream of runner
415201, F04D 2946
Patent
active
042537967
ABSTRACT:
A fan assembly, which includes a centrifugal-type fan wheel mounted for rotation in, e.g., a scroll-like fan casing or a tubular fan casing is provided with a retractable fan inlet funnel which may be selectively positioned relative to the fan wheel between an extended position and a retracted position. In the extended position, the inlet funnel axially overlaps the inlet side of the fan wheel with substantially all the inlet air being directed into the fan wheel. In the retracted position, the inlet funnel is spaced away from the fan wheel to permit a portion of the fan wheel outlet air to recirculate to the inlet side of the fan wheel. Fan performance characteristics including the static pressure, the volume flow rate, the selection of a stable air flow operating point, and the fan wheel power requirements are conveniently and advantageously controlled by adjusting the inlet funnel position.
In the preferred embodiment, the inlet funnel has a converging/diverging venturi shape and is movably connected to a truncated conical base by a linkage assembly. The assembly includes a plurality of links each of which has one end pivoted to the base and the other end pivotally connected to a support ring which is connected to the inlet funnel by struts. Pivotal movement of the links, either by a torque member or a lead-screw
ut arrangement, causes the inlet funnel to change its position relative to the fan wheel and thereby vary the fan performance.
REFERENCES:
patent: 617352 (1899-01-01), Randolph
patent: 622706 (1899-04-01), Nutt
patent: 1053154 (1913-02-01), Campbell et al.
patent: 1326673 (1919-12-01), Lepley
patent: 1846379 (1932-02-01), Anderson
patent: 2504714 (1950-04-01), McGehee
patent: 3173478 (1965-03-01), Maycen
patent: 3576263 (1971-04-01), Abendroth
patent: 4073597 (1978-02-01), Barnhart et al.
Philipps Donald F.
Williamson Richard D.
Casaregola Louis J.
The Marley-Wylain Company
LandOfFree
Fan or blower assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fan or blower assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fan or blower assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-77551