Rotodynamic pump and method
AssigneePratt & Whitney Canada Corp.
InventorsDavid Waddleton, Benjamin Renaud, Sebastien Bergeron, Etienne Plamondon, Jean-Gabriel Gauvreau
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Abstract
A method of controlling a delivery pressure of an aircraft engine fuel system includes operating a rotodynamic fuel pump hydraulically connected to the fuel system to pump a fluid from an inlet of the rotodynamic pump and out of an outlet of the rotodynamic pump for delivery to the fuel system. The method further includes varying an angular relationship between the inlet and the outlet of the pump to control the delivery pressure. An aircraft engine fuel system and a rotodynamic pump are also described.
Claims19
A method of controlling a delivery pressure of an aircraft engine fuel system, comprising:
- operating a rotodynamic fuel pump hydraulically connected to the fuel system to pump a fluid from an inlet of the rotodynamic pump and out of an outlet of the rotodynamic pump for delivery to the fuel system, and
- varying an angular relationship between the inlet and the outlet of the pump to control the delivery pressure by displacing at least one of the inlet and the outlet to vary a distance between the inlet and the outlet.
An aircraft engine fuel system comprising a rotodynamic pump having an inlet and an outlet connected to the fuel system, a pressure regulating assembly operatively associated with at least one of the inlet and the outlet, and a controller configured to vary an angle between the inlet and the outlet to regulate a delivery pressure at the outlet, the controller configured to displace at least one of the inlet and the outlet to vary a distance between the inlet and the outlet.
A rotodynamic pump, comprising
- a housing defining an inlet and an outlet therein, the housing includes a first part and a second part, the first and second parts defining an impeller cavity therebetween, the first part is movable relative to the second part, the first part defines one of the inlet and the outlet, the second part defines another one of the inlet and the outlet,
- an impeller disposed at least in part in the impeller cavity, and
- a pressure regulating mechanism adapted to vary an angular relationship between the inlet and the outlet to control a delivery pressure at the outlet by moving the first part relative to the second part.
Dependencies are inferred from the claim text.