US 12,372,000 B2
Foil, rotor blade, assembly for a turbomachine rotor and rotor
Nicolas Daniel Delaporte, Moissy-Cramayel (FR); Pierre Marie Mulheim, Moissy-Cramayel (FR); Arnaud Martine, Moissy-Cramayel (FR); Antoine Giguet, Moissy-Cramayel (FR); and Vincent Goyon, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/575,954
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jun. 21, 2022, PCT No. PCT/FR2022/051203
§ 371(c)(1), (2) Date Mar. 21, 2024,
PCT Pub. No. WO2023/275456, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 2107207 (FR), filed on Jul. 2, 2021.
Prior Publication US 2024/0337192 A1, Oct. 10, 2024
Int. Cl. F01D 5/30 (2006.01); F01D 5/32 (2006.01)
CPC F01D 5/3007 (2013.01) [F01D 5/326 (2013.01); F05D 2260/36 (2013.01)] 9 Claims
OG exemplary drawing
 
7. A blade of a rotor movable about an axis of rotation, comprising an inner platform, a vane radially extending from the inner platform and a root of the blade radially extending from this inner platform opposite to the vane, the root of the blade comprising:
a first radial face,
a second radial face opposite to the first radial face longitudinally
a first side longitudinal face joining each radial face
a second side longitudinal face joining each radial face,
at least one flank on each side longitudinal face, comprising a seat for bearing against a surface of a housing of the root of the blade,
wherein at least the first side longitudinal face has a notch comprising at least one longitudinal stop surface extending in a plane intersecting the axis of rotation and a guide surface extending in a direction other than the longitudinal stop surface, the notch being intended to receive a recess of a foil to ensure that the foil is longitudinally held relative to the root of the blade at least in a longitudinal direction,
wherein the notch is located between and distant from each radial face, and
wherein the root of the blade comprises a base portion comprising the seats and a restricted portion extending between the inner platform and the base portion, the restricted portion having a width less than the least width of the base portion and in that the notch extends from a planar surface of the side longitudinal face into the restricted portion, forming the longitudinal stop surface and a second longitudinal stop surface perpendicular to the lower surface and tilted with respect to the planar surface to ensure that the foil is longitudinally held relative to the root of the blade in the other longitudinal direction.