Back to results
US 11,466,857 B2Granted
Self-pumping fuel injector for a gas turbine engine and method of operation
AssigneeRaytheon Technologies Corporation
InventorsKen F. Blaney, Stephen K. Kramer
Life of this patent
Estimating the term…
Abstract
A self-pumping fuel injector includes a pump and a motor for, in-part, delivering fuel to a combustor at higher fuel pressures during start-up and ramping-up conditions. Each pump may include a stationary flow interuptor that intermittently and variably supplies fuel to a rotating spindle that, in-turn, expels the fuel into a nozzle of the injector for improve fuel spray distributions.
Claims18
A self-pumping fuel injector for a gas turbine engine, the self- pumping fuel injector comprising:
- a nozzle;
- an integral pump configured to deliver fuel to the nozzle, the pump including a housing and a spindle that is rotatably supported by the housing along a rotational axis;
- a first end portion of the spindle disposed at a fuel outlet, a second end portion of the spindle disposed at a fuel inlet, and the first end portion defining at least in-part a continuous helical passage in communication with the fuel outlet, the continuous helical passage formed in a radial outer surface of the spindle;
- and
- an axially extending channel extending axially within the spindle along the rotational axis and defined by a radial inner surface of the spindle, the axially extending channel fluidly coupled between a fuel inlet port at the fuel inlet and a fuel outlet port, the fuel inlet port projecting into the spindle to the axially extending channel, and the fuel outlet port projecting into the spindle from the continuous helical passage to the axially extending channel such that the fuel outlet port is at a first end of the continuous helical passage and the fuel outlet is at a second end of the continuous helical passage opposite the first end.
2 more elements
An injector for a gas turbine engine, comprising:
- a nozzle;
- and
- an integral pump configured to deliver fuel to the nozzle, the pump including a housing and a spindle rotatably support by the housing along a rotational axis;
- a first end portion of the spindle disposed at a fuel outlet, a second end portion of the spindle disposed at a fuel inlet, the first end portion configured with a plurality of discrete helical passages in a radial outer surface of the spindle, and each of the plurality of discrete helical passages in fluid communication with the fuel outlet;
- and
- a channel extending axially within the spindle along the rotational axis, the channel fluidly coupled between a fuel inlet port at the fuel inlet and a plurality of fluid outlet ports, the fuel inlet port projecting into the spindle to the channel, and each of the plurality of fuel outlet ports projecting into the spindle from a respective one of the plurality of discrete helical passages to the channel such that the fuel outlet port is at a first end of the plurality of discrete helical passages and the fuel outlet is at a second end of the plurality of discrete helical passages opposite the first end.
3 more elements
Dependencies are inferred from the claim text.