Patent ID: 11927138
Assignee: RTX CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 18:
19. A speed change mechanism for a gas turbine engine comprising:
a star gear system including:
a carrier having a flexible carrier support for attaching to a static structure of a gas turbine engine;
a sun gear for attaching to a fan drive turbine;
a ring gear having a flexible coupling for attaching to a ring gear attachment point on a fan drive shaft;
a lubricant manifold in fluid communication with the carrier and attached to an axially downstream side of the carrier, wherein the lubricant manifold is in fluid communication with a bearing on each of a plurality of star gears and the plurality of star gears and the ring gear each include a lubricant passage for directing lubricant radially outward; and
a first fan section support bearing supporting the fan drive shaft and mounted forward of the ring gear attachment point and a second fan section bearing supporting the fan drive shaft and mounted aft of the ring gear attachment point, wherein an outer race of the first fan section bearing is fixed relative to an engine static structure.