POWER EXTRACTION SYSTEM AND METHOD FOR A GAS TURBINE ENGINE OF A VEHICLE
First Claim
1. A power extraction system for a gas turbine engine of a vehicle, the power extraction system comprising:
- a high pressure (HP) spool tower shaft mechanically coupled between a high pressure (HP) spool of the gas turbine engine of the vehicle and an accessory gearbox assembly coupled to the gas turbine engine, the HP spool tower shaft extracting mechanical power from the HP spool; and
a low pressure (LP) spool tower shaft mechanically coupled between a low pressure (LP) spool of the gas turbine engine of the vehicle and the accessory gearbox assembly, the LP spool tower shaft extracting mechanical power from the LP spool;
the accessory gearbox assembly comprising;
an accessory drive coupled to the HP spool tower shaft and coupled to the LP spool tower shaft, the accessory drive extracting and mechanically combining the mechanical power from both the HP spool and the LP spool;
a planetary gear train coupled to the accessory drive, the planetary gear train driven by the mechanical power from both the HP spool and the LP spool; and
one or more engine-driven accessories coupled to the planetary gear train, the one or more engine-driven accessories driven by a planetary gear train output to generate power for use by one or more vehicle systems of the vehicle.
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Accused Products
Abstract
A power extraction system and method for a gas turbine engine of a vehicle are provided. The system has an HP spool tower shaft coupled between an HP spool of the gas turbine engine and an accessory gearbox assembly coupled to the gas turbine engine. The HP spool tower shaft extracts mechanical power from the HP spool. The system has an LP spool tower shaft coupled between an LP spool of the gas turbine engine and the accessory gearbox assembly. The LP spool tower shaft extracts mechanical power from the LP spool. The system further has the accessory gearbox assembly having an accessory drive combining the mechanical power from both the HP spool and LP spool, having a planetary gear train coupled to the accessory drive, and having one or more engine-driven accessories coupled to the planetary gear train and driven by a planetary gear train output to generate power.
49 Citations
20 Claims
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1. A power extraction system for a gas turbine engine of a vehicle, the power extraction system comprising:
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a high pressure (HP) spool tower shaft mechanically coupled between a high pressure (HP) spool of the gas turbine engine of the vehicle and an accessory gearbox assembly coupled to the gas turbine engine, the HP spool tower shaft extracting mechanical power from the HP spool; and a low pressure (LP) spool tower shaft mechanically coupled between a low pressure (LP) spool of the gas turbine engine of the vehicle and the accessory gearbox assembly, the LP spool tower shaft extracting mechanical power from the LP spool; the accessory gearbox assembly comprising; an accessory drive coupled to the HP spool tower shaft and coupled to the LP spool tower shaft, the accessory drive extracting and mechanically combining the mechanical power from both the HP spool and the LP spool; a planetary gear train coupled to the accessory drive, the planetary gear train driven by the mechanical power from both the HP spool and the LP spool; and one or more engine-driven accessories coupled to the planetary gear train, the one or more engine-driven accessories driven by a planetary gear train output to generate power for use by one or more vehicle systems of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An air vehicle comprising:
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a fuselage; at least one wing connected to the fuselage; at least one multi-spool gas turbine engine coupled to the at least one wing, the at least one multi-spool gas turbine engine having a high pressure (HP) spool and a low pressure (LP) spool; and a combined HP/LP spool power extraction system coupled to the high pressure (HP) spool and to the low pressure (LP) spool of the at least one multi-spool gas turbine engine, the combined HP/LP spool power extraction system comprising; a high pressure (HP) spool tower shaft mechanically coupled between the HP spool and an accessory gearbox assembly coupled to the at least one multi-spool gas turbine engine, the HP spool tower shaft extracting mechanical power from the HP spool; and a low pressure (LP) spool tower shaft mechanically coupled between the LP spool and the accessory gearbox assembly, the LP spool tower shaft extracting mechanical power from the LP spool; the accessory gearbox assembly comprising; an accessory drive coupled to the HP spool tower shaft and coupled to the LP spool tower shaft, the accessory drive extracting and mechanically combining the mechanical power from both the HP spool and the LP spool; a planetary gear train coupled to the accessory drive, the planetary gear train comprising a ring gear driven by mechanical power extracted from the LP spool, a carrier driven by mechanical power extracted from the HP spool, and a sun gear that generates a planetary gear train output; and one or more engine-driven accessories coupled to the planetary gear train, the one or more engine-driven accessories driven by the planetary gear train output to generate power for use by one or more vehicle systems of the air vehicle. - View Dependent Claims (10, 11, 12, 13)
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14. A method of extracting mechanical power from both a high pressure (HP) spool and a low pressure (LP) spool of a gas turbine engine of a vehicle, to drive one or more engine-driven accessories, the method comprising the steps of:
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coupling a combined HP/LP spool power extraction system to the high pressure (HP) spool and to the low pressure (LP) spool of the gas turbine engine of the vehicle, the combined HP/LP spool power extraction system comprising; an accessory gearbox assembly comprising an accessory drive, a planetary gear train coupled to the accessory drive, and one or more engine-driven accessories coupled to the planetary gear train; a high pressure (HP) spool tower shaft mechanically coupled between the HP spool and the accessory gearbox assembly; and a low pressure (LP) spool tower shaft mechanically coupled between the LP spool and the accessory gearbox assembly; extracting mechanical power from both the HP spool and the LP spool, via the accessory drive, to drive the planetary gear train; mechanically combining via the planetary gear train, the mechanical power extracted from both the HP spool and the LP spool, to obtain a planetary gear train output; driving the one or more engine-driven accessories with the planetary gear train output; and generating power from the one or more engine-driven accessories and supplying the power to one or more vehicle systems of the vehicle. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification