Aircraft fuel pump with centrifugal pump and regenerative pump stages
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 9, 2000
Grant Date -
N/A
app pub date -
Nov 13, 1997
filing date -
Nov 13, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fuel pressurization and pumping system for use in a turbine powered aircraft or the like makes use of the advantages of centrifugal pumps, even in a high pressure mode and includes a centrifugal volute pump (24) having a fuel inlet (28) and fuel outlet (32) along with a regenerative pump (34) having a fuel inlet (36) and a fuel outlet (38). The fuel outlet (32) of the centrifugal volute pump (24) is connected to the fuel inlet (36) of the regenerative pump (34) and a valve (50) is provided for blocking flow from the centrifugal volute pump (24) to the regenerative pump (34). A first pressure regulator (56) is connected to regenerative pump outlet (38) for maintaining pressure thereat at a relatively low elevated level and a second pressure regulator (130) is connected to the regenerative pump outlet (38) for maintaining pressure thereat at a relatively high elevated level. A valve system (66), (90) is provided for selectively disabling the first pressure regulator (56).
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