Variable speed centrifugal pump

Details Variable speed centrifugal pump Variable speed centrifugal pump

1979-08-10

1982-06-01

Croyle, Carlton R.

Pumps

Condition responsive control of pump drive motor

With control of pump drive transmission

415122R, 417 22, 417 87, F04B 4900

Patent

active

043325270

ABSTRACT:
A variable speed centrifugal pump for aircraft fuel systems and the like having the capability of matching fuel flow and pressure to engine requirements throughout a variable flight profile without in-line flow controls and metering devices comprising a unique combination of centrifugal impeller stage and positive displacement pump device which controllingly, drivingly, fluidly couples the impeller to the aircraft engine drive. The positive displacement pump device includes rotating hydraulic displacing input and output members, the latter being driven by the former at a relative speed normally responsive to discharge flow rate of the positive displacement pump device which is controlled to regulate impeller speed for matching pump flow and pressure to engine requirements. The positive displacement pump may employ fuel as the pumping media in which event the discharge flow from the positive displacement pump device may be directed to the main pump outlet during pump priming and engine start-up and, alternately, to a jet nozzle provided in series with the centrifugal impeller stage to provide motive flow therefor under idle and in-flight conditions. During engine prime and start-up, free rotation of the impeller may be restrained by a clutch responsive to impeller discharge pressure to ensure adequate fuel supply delivery by the positive displacement pump device to the engine at low RPM's. Alternatively, other hydraulic fluid may be used as the pumping media for the positive displacement pump, and an auxiliary start pump provided for use during pump prime and engine start-up.

REFERENCES:
patent: 2741421 (1956-04-01), Wood
patent: 2970641 (1961-02-01), Rosen et al.
patent: 3532441 (1970-10-01), Schofield
patent: 3547557 (1970-12-01), Grennan et al.
patent: 4004412 (1977-01-01), Burnell
patent: 4086019 (1978-04-01), Poole
patent: 4142839 (1979-03-01), Davis et al.
Control of Aircraft and Missile Powerplants by Sobey et al., John Wiley and Sons, Inc., Mar., 1963, pp. 32 and 33.

Affiliated with

Also associated with

Rating

Variable speed centrifugal pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable speed centrifugal pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable speed centrifugal pump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1847557