Planetary gear system arrangement with auxiliary oil system
AssigneeRtx Corporation
InventorsWilliam G. Sheridan, Michael E. McCune, Lawrence E. Portlock
Life of this patent
Estimating the term…
Abstract
In an embodiment of the present disclosure, a gas turbine engine includes a fan, a first compressor stage and a second compressor stage, a first turbine stage and a second turbine stage, and wherein said first turbine stage drives said second compressor stage as a high spool, and wherein said second turbine stage drives said first compressor stage as part of a low spool, and a gear train driving said fan with said low spool, and such that said fan and said first compressor stage rotate in the same direction, and wherein said high spool operates at higher pressures than said low spool.
Claims24
A gas turbine engine comprising:
- a fan section,
- a first compressor stage and a second compressor stage;
- a first turbine stage and a second turbine stage, wherein said first turbine stage drives said second compressor stage as a high spool, and wherein said second turbine stage drives said first compressor stage as a low spool;
- a planetary gear train having at least one planetary gear, a sun gear, a ring gear fixed from rotation relative to an engine static structure, a ring gear support, a carrier supporting said at least one planetary gear, said carrier driving said fan section, wherein said ring gear has a recess configured to balance force transmitted through the ring gear and wherein the ring gear has at least one ring gear opening therethrough and said ring gear support including a ring gear support opening through the ring gear and the ring gear support that is perpendicular to the at least one ring gear opening;
- a lubricating system for said planetary gear train, wherein said at least one ring gear opening and said ring gear support opening is in fluid communication with said lubricating system;
- and
- an aft gutter aft of said ring gear and a forward gutter forward of said ring gear, the aft and forward gutters configured to collect lubricant from the lubricating system, and wherein the ring gear support opening is defined between a forward end and an aft end, and wherein the aft end is configured to receive the lubricant from the aft gutter and the forward end is configured to pass the lubricant to the forward gutter;
- wherein said low spool drives said fan section via said planetary gear train.
Dependencies are inferred from the claim text.