US 12,449,030 B2
Mounting assembly for a gearbox assembly
Bugra H. Ertas, Niskayuna, NY (US); Ravindra Shankar Ganiger, Bengaluru (IN); Andrea Piazza, Turin (IT); and Brandon W. Miller, Middletown, OH (US)
Assigned to GENERAL ELECTRIC COMPANY, Evendale, OH (US); and GE AVIO S.R.L., Rivalta di Torino (IT)
Filed by General Electric Company, Evendale, OH (US); and GE Avio S.r.l., Rivalta di Torino (IT)
Filed on Oct. 9, 2024, as Appl. No. 18/910,919.
Application 18/910,919 is a continuation in part of application No. 17/929,105, filed on Sep. 1, 2022, granted, now 12,203,418.
Claims priority of application No. 202211024200 (IN), filed on Apr. 25, 2022.
Prior Publication US 2025/0035206 A1, Jan. 30, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. F16H 57/025 (2012.01); F02C 7/36 (2006.01); F16H 1/28 (2006.01); F16H 57/02 (2012.01); F16H 57/023 (2012.01)
CPC F16H 57/025 (2013.01) [F02C 7/36 (2013.01); F16H 1/2818 (2013.01); F16H 1/2827 (2013.01); F16H 1/2845 (2013.01); F16H 57/023 (2013.01); F16H 2057/02039 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A gearbox assembly for a gas turbine engine, the gearbox assembly comprising:
a first gear, a second gear, and a third gear, the first gear being a split sun gear comprising a forward sun gear and an aft sun gear separate from the forward sun gear;
a flex coupling configured to mount the forward sun gear and the aft sun gear to a rotating shaft of the gas turbine engine;
a flex mount configured to mount the second gear to an engine static structure; and
a fan frame configured to mount the third gear to the engine static structure,
wherein each of the flex coupling and the flex mount is characterized by a lateral impedance parameter ratio, a bending impedance parameter ratio, and a torsional impedance parameter ratio,
wherein the lateral impedance parameter ratio of the flex coupling, the flex mount, or both is less than or equal to 0.5,
wherein the bending impedance parameter ratio of the flex coupling, the flex mount, or both is less than or equal to 0.5, and
wherein the torsional impedance parameter ratio of the flex coupling, the flex mount, or both is greater than or equal to 0.1.