Sun gear drive arrangement
AssigneeROLLS-ROYCE plc
InventorsStewart T. Thornton, Andrew Swift
Life of this patent
Estimating the term…
Abstract
Disclosed is a gas turbine engine comprising: a low pressure spool having a low pressure compressor and a low pressure turbine connected by a low pressure shaft; a reduction gear train having a sun gear, a carrier having a plurality of planet gears attached thereto, and a ring gear, wherein the sun gear is driveably connected to the low pressure shaft, and either of carrier and ring gear provides an output drive connected to a propulsive fan; wherein the connection between the low pressure shaft and the sun gear includes a flexible drive shaft having serially connected concentrically nested first and second input shafts between the low pressure shaft and sun gear.
Claims19
A gas turbine engine, comprising:
- a low pressure spool having a low pressure compressor and a low pressure turbine connected by a low pressure shaft;
- a reduction gear train having a sun gear, a carrier having a plurality of planet gears attached thereto, and a ring gear, wherein the sun gear is driveably connected to the low pressure shaft, and either of carrier and ring gear provides an output drive connected to a propulsive fan;
- wherein the connection between the low pressure shaft and the sun gear includes a flexible drive shaft having serially connected concentrically nested first and second input shafts between the low pressure shaft and sun gear.
A gas turbine engine, comprising:
- a low pressure spool having a low pressure compressor and a low pressure turbine connected by a low pressure shaft;
- a reduction gear train having a sun gear, a carrier having a plurality of planet gears attached thereto, and a ring gear, wherein the sun gear is driveably connected to the low pressure shaft, and either of carrier and ring gear provides an output drive connected to a propulsive fan;
- wherein the connection between the low pressure shaft and the sun gear includes a flexible drive shaft having serially connected concentrically nested first and second input shafts between the low pressure shaft and sun gear in which the first and second input shafts are connected by a first flexible coupling which is located fore of the sun gear.
A gas turbine engine, comprising:
- a low pressure spool having a low pressure compressor and a low pressure turbine connected by a low pressure shaft;
- a reduction gear train having a sun gear, a carrier having a plurality of planet gears attached thereto, and a ring gear, wherein the sun gear is driveably connected to the low pressure shaft, and either of carrier and ring gear provides an output drive connected to a propulsive fan;
- wherein the connection between the low pressure shaft and the sun gear includes a flexible drive shaft which extends from aft of the sun gear, through the sun gear to a terminal end fore of the sun gear, and back on itself to a connection with the sun gear.
Dependencies are inferred from the claim text.