Aeroengine starter/generator arrangement
AssigneeROLLS-ROYCE plc
InventorDavid C. Butt
Life of this patent
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Abstract
An open-rotor gas turbine engine comprising a starter/generator, a first spool and a second spool, the second spool is of a lower pressure than the first spool; wherein the starter/generator is connected to the first and second spools via first and second clutches respectively. The method of operating the open-rotor engine comprises the step of supplying power to the starter/generator to drive the first spool via the first clutch to start the engine and, once the engine is self-propelling, a step of driving the starter/generator from the second spool via the second clutch to generate electricity.
Claims15
An open-rotor gas turbine engine comprising a starter/generator, a first spool and a second spool, the second spool is of a lower pressure than the first spool;
- wherein the starter/generator is connected to the first and second spools via one-way and oppositely driving first and second clutches respectively, wherein in a starting mode the starter/generator drives the first spool to start the engine and in a generating mode the starter/generator is driven by the second spool to generate electricity.
A method of operating an open-rotor gas turbine engine comprising a starter/generator, a first spool and a second spool, the second spool is of a lower pressure than the first spool;
- wherein the starter/generator is connected to the first and second spools via first and second clutches respectively, wherein the method comprises a first step of supplying power to the starter/generator to drive the first spool via the first clutch to start the engine and, once the engine is self-propelling, a second step of driving the starter/generator from the second spool via the second clutch to generate electricity.
Dependencies are inferred from the claim text.