US 11,891,185 B2
Nacelle for a propulsion assembly with a very high bypass ratio, comprising a removable and structural front internal structure
Patrick André Boileau, Moissy-Cramayel (FR); Jean-Philippe Joret, Moissy-Cramayel (FR); Vincent Jean-François Peyron, Moissy-Cramayel (FR); and Gina Ferrier, Moissy-Cramayel (FR)
Assigned to SAFRAN NACELLES, Gonfreville-l'Orcher (FR)
Appl. No. 17/999,180
Filed by SAFRAN NACELLES, Gonfreville-l'Orcher (FR)
PCT Filed May 18, 2021, PCT No. PCT/FR2021/050873
§ 371(c)(1), (2) Date Nov. 17, 2022,
PCT Pub. No. WO2021/234279, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 2005229 (FR), filed on May 20, 2020.
Prior Publication US 2023/0182913 A1, Jun. 15, 2023
Int. Cl. B64D 29/08 (2006.01); F02K 1/72 (2006.01); B64D 29/06 (2006.01)
CPC B64D 29/08 (2013.01) [B64D 29/06 (2013.01); F02K 1/72 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A nacelle for an aircraft bypass propulsion assembly, said nacelle comprising:
an external structure and a rear internal structure extending around a longitudinal central axis, the rear internal structure being able to move between:
a flight position wherein the rear internal structure delimits radially inwards a first longitudinal portion of an annular channel intended to channel the secondary flow in the propulsion assembly and wherein the rear internal structure covers a first longitudinal portion of an internal space intended to receive an engine of the propulsion assembly, and
a maintenance position wherein the rear internal structure is configured for uncovering at least a part of said first longitudinal portion of the internal space in order to enable an operator to access said internal space,
wherein said nacelle comprises a front internal structure comprising beams and one or more panels, the beams extending longitudinally and being spaced apart from each other circumferentially with respect to the longitudinal central axis, the one or more panels being able to be placed in:
a closed configuration wherein the one or more panels cooperate with the beams so as to delimit radially inwards a second longitudinal portion of the annular channel and so as to cover a respective circumferential portion of a second longitudinal portion of said internal space,
a maintenance configuration wherein the one or more panels leave clear a circumferential space between the beams in order to enable an operator to access said second longitudinal portion of the internal space.