US 11,767,767 B2
Turbomachine stator sector having flexible regions subjected to high stress
Laurent Gilles Dezouche, Moissy-Cramayel (FR); Sophie Martine Jobez, Moissy-Cramayel (FR); and Julien Marc Antoine Prevost, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/425,410
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jan. 14, 2020, PCT No. PCT/FR2020/050047
§ 371(c)(1), (2) Date Jul. 23, 2021,
PCT Pub. No. WO2020/157405, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 1900872 (FR), filed on Jan. 30, 2019.
Prior Publication US 2022/0090508 A1, Mar. 24, 2022
Int. Cl. F01D 11/00 (2006.01); B22F 5/00 (2006.01); B33Y 80/00 (2015.01); F01D 25/24 (2006.01); F01D 25/06 (2006.01); F01D 25/04 (2006.01); B33Y 10/00 (2015.01)
CPC F01D 11/001 (2013.01) [B22F 5/009 (2013.01); B33Y 80/00 (2014.12); F01D 25/24 (2013.01); B33Y 10/00 (2014.12); F05D 2220/30 (2013.01); F05D 2230/31 (2013.01); F05D 2240/11 (2013.01); F05D 2240/12 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A turbine stator sector comprising a plurality of vanes extending along a radial direction between a first end and a second end and along an axial direction between a leading edge and a trailing edge, said sector further comprising an internal shroud linked to the first end of the plurality of vanes and an external shroud linked to the second end of the plurality of vanes,
wherein the turbine stator sector comprises at least one annular portion forming all or part of the internal shroud or of the external shroud, said at least one annular portion comprising a first partition at a junction with the first or second end of the plurality of vanes and a second partition held spaced from the first partition along the radial direction by a three dimensional structure, wherein the internal shroud includes a fore end and an aft end, wherein the three dimensional structure of the external shroud extends past the aft end of the internal shroud, wherein the at least one annular portion of the external shroud extends past a terminal end of one or more protruding tabs along the axial direction, wherein the three dimensional structure includes a plurality of cutouts, and wherein vanes of the plurality of vanes are integral with the internal shroud and with the external shroud, and the at least one annular portion being in a single piece with the internal shroud or the external shroud.