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US 2020/0003422 A1Published application
Self-pumping fuel injector for a gas turbine engine and method of operation
AssigneeUnited Technologies Corporation
InventorsKen F. Blaney, Stephen K. Kramer
Life of this patent
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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.
Claims13
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, and the first end portion defining at least in-part a helical passage in communication with the fuel outlet;
- an axially extending channel defined by a radial inner surface of the spindle;
- and
- the central channel fluidly coupled between a fuel inlet and the helical passage.
3 more elements
Dependencies are inferred from the claim text.