DUAL-STAGE GEAR PUMP WITH REDUCED PRESSURE RIPPLE

A fuel system includes a fuel gathering system (14) in fluid communication with a fuel storage container (12), and a fluid pump assembly (16) in fluid communication with the fuel gathering system (14). The fluid pump assembly (16) includes a main gear pump stage (28) and a flow attenuator (80). A ma...

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Bibliographische Detailangaben
1. Verfasser:	NI, Weishun William
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS WEAPONS
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Beschreibung
Zusammenfassung:	A fuel system includes a fuel gathering system (14) in fluid communication with a fuel storage container (12), and a fluid pump assembly (16) in fluid communication with the fuel gathering system (14). The fluid pump assembly (16) includes a main gear pump stage (28) and a flow attenuator (80). A main driven gear (98) is meshed with a main drive gear (97) in a main pump conduit, and a main pump bearing assembly (76) rotatably supports the main drive gear (97) and the main driven gear (98). The flow attenuator (80) is disposed around the main pump conduit, and includes a substantially polygonal fluid opening (84). Edges of the opening (84) are substantially aligned with an undercut bearing portion on at least one of an inlet side and an outlet side of the main pump conduit to define a non-round fluid boundary.