US 12,110,829 B2
Turbomachine fan assembly comprising a roller bearing and a double-row ball bearing with oblique contact
François Marie Paul Marlin, Moissy-Cramayel (FR); Didier Gabriel Bertrand Desombre, Moissy-Cramayel (FR); Christophe Paul Jacquemard, Moissy-Cramayel (FR); and Laurent Paul François Perrot, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/754,167
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Sep. 7, 2020, PCT No. PCT/FR2020/051540
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/058888, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 1910715 (FR), filed on Sep. 27, 2019.
Prior Publication US 2022/0290617 A1, Sep. 15, 2022
Int. Cl. F02C 7/36 (2006.01); F01D 25/16 (2006.01); F02C 7/06 (2006.01); F16C 19/18 (2006.01)
CPC F02C 7/36 (2013.01) [F01D 25/16 (2013.01); F02C 7/06 (2013.01); F16C 19/181 (2013.01); F05D 2220/36 (2013.01); F05D 2240/50 (2013.01); F16C 2360/23 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fan assembly for an aircraft turbomachine, the assembly comprising a fan shaft and first and second bearings configured to guide the fan shaft in rotation about a central axis, wherein the first bearing has cylindrical rollers and the second bearing has a double-row of balls with oblique contact,
wherein the second bearing comprises first and second rows of balls, and an inner ring and an outer ring each comprising first and second races, the first race of the inner and outer rings receiving the first row of balls, the second race of the inner and outer rings receiving the second row of balls, and
wherein the fan shaft comprises a first support portion carrying an inner ring of the first bearing, a second support portion carrying an inner ring of the second bearing, a first frustoconical junction portion connecting together the first and second support portions, and a second frustoconical junction portion intended to connect together the second support portion and a reduction gear of the turbomachine, said second support portion having a thickness taken perpendicular to a longitudinal extent thereof that is larger than a thickness of the first frustoconical junction portion taken perpendicular to a longitudinal extent thereof and a thickness of the second frustoconical junction portion taken perpendicular to a longitudinal extent thereof.