US 12,000,298 B2
Device for pressurizing turbomachine downstream enclosure, and corresponding turbomachine
Maeva Daphne Gros-Borot, Moissy-Cramayel (FR); and Clementine Charlotte Marie Mouton, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/250,346
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Oct. 22, 2021, PCT No. PCT/FR2021/051863
§ 371(c)(1), (2) Date Apr. 24, 2023,
PCT Pub. No. WO2022/090654, PCT Pub. Date May 5, 2022.
Claims priority of application No. 2010983 (FR), filed on Oct. 27, 2020.
Prior Publication US 2023/0399960 A1, Dec. 14, 2023
Int. Cl. F01D 5/06 (2006.01); F01D 25/16 (2006.01); F02C 7/06 (2006.01); F01D 5/02 (2006.01)
CPC F01D 25/16 (2013.01) [F02C 7/06 (2013.01); F01D 5/026 (2013.01); F01D 5/06 (2013.01); F05D 2220/323 (2013.01); F05D 2240/50 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A device for pressurising a downstream enclosure of a turbomachine with a longitudinal axis X, the device being supplied by means of a pressurisation air flow (FP) collected upstream of the turbomachine along the longitudinal axis, the device comprising:
a first shaft segment extending along the longitudinal axis X,
a second shaft segment coupled to the first shaft segment via longitudinal internal splines carried by the first shaft segment and longitudinal external splines carried by the second shaft segment, the second shaft segment extending at least partly inside the first shaft segment with a radial distance along a radial axis Z perpendicular to the longitudinal axis X, the internal and external splines comprising faces respectively,
wherein it comprises at least one first passage made through the internal and external splines, and at least one orifice passing through the second shaft segment on either side along the radial axis, the orifice being arranged upstream of the first passage and, on the one hand, being in fluidic communication with the first passage and, on the other hand, opening out inside the second shaft segment so as to allow the circulation of the pressurisation air flow (FP) from the first passage between the first shaft segment and the second shaft segment, then through the orifice towards the downstream enclosure of the turbomachine and in that the internal and external splines are configured so as to create pairs of internal and external splines adjacently along a circumferential direction, with faces in contact with each other, and empty inter-spline spaces forming first passages.