Back to results
US 2014/0227084 A1Published application
Compound star gear system with rolling element bearings
AssigneeUnited Technologies Corporation
InventorWilliam G. Sheridan
Life of this patent
Estimating the term…
Abstract
A compound star gear system includes a sun gear rotatable about a first axis that drives a first plurality of star gears rotatable about a plurality of fixed axes. The first plurality of star gears drives a second plurality of star gears spaced axially apart from the first plurality of star gears. The second plurality of star gears drive the ring gear that in turn drives a fan drive shaft.
Claims20
A fan drive gear assembly comprising:
- a sun gear rotatable about a first axis;
- a first plurality of star gears driven by the sun gear and rotatable about a plurality of fixed axes;
- a second plurality of star gears rotatable with the first plurality of star gears about the plurality of fixed axes;
- a ring gear driven by the second plurality of star gears;
- and
- a fan drive shaft driven by the ring gear.
3 more elements
A gas turbine engine comprising:
- a fan rotatable about an engine axis;
- a core engine section including a turbine section;
- and
- a fan drive gear system driven by the turbine section for driving the fan, the fan drive gear system including a sun gear rotatable about the engine axis, a first plurality of star gears driven by the sun gear and rotatable about a plurality of fixed axes, a second plurality of star gears rotatable with the first plurality of star gears about the plurality of fixed axes, a ring gear driven by the second plurality of star gears, and a fan drive shaft driven by the ring gear.
1 more element
Dependencies are inferred from the claim text.