Apparatus for driving an accessory gearbox in a gas turbine engine
AssigneeUnited Technologies Corporation
InventorGuy Wallace Miller
Life of this patent
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Abstract
A mechanical drive system for an accessory gearbox of a gas turbine engine is provided. The gas turbine engine includes a high-pressure drive shaft and a low-pressure drive shaft. The mechanical drive system includes a tower shaft and a lay shaft. The tower shaft is connected by a first gear arrangement to the low-pressure drive shaft of the gas turbine engine. The lay shaft is connected by a second gear arrangement to the first tower shaft, and connected to the accessory gearbox.
Claims7
A mechanical drive system for an accessory gearbox of a gas turbine engine, which engine has a low pressure drive shaft extending between and connected to a low pressure compressor and a low pressure turbine, the drive system comprising:
- a tower shaft connected by a first gear arrangement to the low pressure drive shaft;
- and
- a lay shaft connected by a second gear arrangement to the tower shaft, and connected to the accessory gearbox;
- and
- wherein the first gear arrangement includes a first gear, a second gear, a third gear, a fourth gear, and an intermediate shaft;
- wherein the first gear is attached to the low pressure drive shaft, the second gear and the third gears are attached to the intermediate shaft, and the fourth gear is attached to the tower shaft;
- wherein the first gear is engaged with the second gear, and the third gear is engaged with the fourth gear.
A gas turbine engine, comprising:
- a high pressure drive shaft connected to and extending between a high pressure compressor and a high pressure turbine;
- a low pressure drive shaft connected to and extending between a low pressure compressor and a low pressure turbine;
- wherein the high pressure drive shaft and the low pressure drive shaft rotate about an axially extending engine centerline;
- an accessory gear box;
- a tower shaft connected by a first gear arrangement to the low pressure drive shaft;
- and
- a lay shaft connected by a second gear arrangement to the tower shaft, and connected to the accessory gearbox;
- and
- wherein the first gear arrangement includes a first gear, a second gear, a third gear, a fourth gear, and an intermediate shaft;
- wherein the first gear is attached to the low pressure drive shaft, the second gear and the third gears are attached to the intermediate shaft, and the fourth gear is attached to the tower shaft;
- wherein the first gear is engaged with the second gear, and the third gear is engaged with the fourth gear.
Dependencies are inferred from the claim text.