US 12,264,590 B2
Fan assembly for an engine having redundant trunnion retention
Abhijeet Jayshingrao Yadav, Karad (IN); Nicholas Joseph Kray, Mason, OH (US); and Nitesh Jain, Bengaluru (IN)
Assigned to General Electric Company, Evendale, OH (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Aug. 8, 2023, as Appl. No. 18/366,800.
Prior Publication US 2025/0052172 A1, Feb. 13, 2025
Int. Cl. B64C 11/06 (2006.01); F01D 21/04 (2006.01); F04D 29/18 (2006.01); F04D 29/46 (2006.01)
CPC F01D 21/045 (2013.01) [B64C 11/06 (2013.01); F04D 29/181 (2013.01); F04D 29/462 (2013.01); F05D 2220/36 (2013.01); F05D 2260/70 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fan assembly for an engine, the fan assembly comprising:
a fan blade;
a disk having a generally annular shape and comprising a disk segment; and
a trunnion mechanism comprising a trunnion, a first attachment system, and a second attachment system, the trunnion comprising a platform and a shaft, the fan blade adjacent to the platform of the trunnion, the trunnion extending at least partially through the disk segment and attached to the disk segment using the first attachment system along a preload path, the first and second attachment systems comprising first and second retention features, respectively, separate from the preload path,
wherein, during operation of the fan assembly, the first attachment system retains the trunnion within the disk along a first load path, and
wherein, upon a failure in the trunnion, the first and second retention features together retain the trunnion within the disk segment along a second load path, the first load path being different than the second load path.