Centrifugal pump with starting stage
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United States of America Patent
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-
Oct 10, 1995
Issued Date -
N/A
app pub date -
Dec 2, 1994
filing date -
Aug 3, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A novel centrifugal pumping system is disclosed for supplying fuel to aircraft gas turbines. The system has a common rotor with two different sets of impeller blades on opposite sides. A regenerative/liquid-ring starting pump is located on one side of the rotor, and a centrifugal impeller is located on the other. During engine start-up, the regenerative/liquid-ring pump is capable of priming itself and supplies engine fluid and pressure. The starting pump delivers fuel until the main pump reaches a speed sufficient to provide adequate pressure for fuel delivery. At that time, the starting pump is switched off, via a valving system.
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