US 12,392,253 B2
Method for maintaining a bladed wheel of a high-pressure turbine of a turbomachine
Tangi Rumon Brusq, Moissy-Cramayel (FR); and Vincent Gérard Michel Moreau, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/842,862
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Mar. 8, 2023, PCT No. PCT/FR2023/050308
§ 371(c)(1), (2) Date Aug. 30, 2024,
PCT Pub. No. WO2023/175256, PCT Pub. Date Sep. 21, 2023.
Claims priority of application No. 2202428 (FR), filed on Mar. 18, 2022.
Prior Publication US 2025/0198299 A1, Jun. 19, 2025
Int. Cl. F01D 11/14 (2006.01); F01D 5/30 (2006.01)
CPC F01D 11/14 (2013.01) [F01D 5/3092 (2013.01); F05D 2300/17 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for maintaining a bladed wheel (6) of a high-pressure turbine of a turbomachine, extending along an axis, comprising a disc (11) comprising cavities (15), and blades (12) extending radially and each comprising an airfoil (13) having a radially external tip and a radially internal root (14), the root (14) of each blade (12) being mounted in a respective cavity (15) of the disc (11), said root (14) being supported by the disc (11) by means of surfaces of the root (14) and of the disc (11) which form bearing surfaces (19), characterized in that at least one foil (21) is removably mounted between the root (14) of at least one blade (12) and the disc (11), at the corresponding bearing surfaces (19), said method comprising the following steps:
measuring a radial clearance (j) between the tip (16) of at least one blade (12), and a shroud (20) of the turbomachine surrounding the bladed wheel,
when the radial clearance (j) is greater than a determined value, removing said foil (21).