Patent ID: 11873767
Assignee: GENERAL ELECTRIC COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 13:
14. A turbomachine engine comprising:
a fan assembly comprising a plurality of fan blades;
a core engine comprising a turbine and a first input shaft rotatable with the turbine and configured to rotate in a first rotational direction;
a secondary gear assembly with a 1:1 gear ratio that receives the first input shaft and is configured to drive a second input shaft in a second rotational direction that is opposite from the first rotational direction; and
a primary gear assembly that receives the second input shaft at a first speed and drives an output shaft coupled to the fan assembly at a second speed, the second speed being slower than the first speed, the primary gear assembly comprising a sun gear, a plurality of planet gear layshafts that each support a first stage planet gear and a second stage planet gear, and a ring gear, the sun gear disposed about a longitudinal centerline of the primary gear assembly;
wherein the first stage planet gear comprises a first gear set and a second gear set supported at the planet gear layshaft, and the second stage planet gear comprises a third gear set supported at a first outer portion of the planet gear layshaft and a fourth gear set supported at a second outer portion of the planet gear layshaft.