US 12,085,015 B2
Assembly for retaining a gear train in a turbomachine
Julien Patrick Becoulet, Moissy-Cramayel (FR); and Olivier Formica, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/626,112
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jul. 8, 2020, PCT No. PCT/FR2020/051222
§ 371(c)(1), (2) Date Jan. 11, 2022,
PCT Pub. No. WO2021/005306, PCT Pub. Date Jan. 14, 2021.
Claims priority of application No. 1907641 (FR), filed on Jul. 8, 2019.
Prior Publication US 2023/0003169 A1, Jan. 5, 2023
Int. Cl. F02C 3/107 (2006.01); F02C 7/28 (2006.01); F02K 3/06 (2006.01)
CPC F02C 3/107 (2013.01) [F02K 3/06 (2013.01); F02C 7/28 (2013.01); F05D 2260/40311 (2013.01); F05D 2260/96 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An assembly for retaining a gear train (32) in a turbomachine, the assembly comprising:
an annular casing (44); and
an annular part (48) engaged and rotationally fixed in the annular casing (44) by annular means of cogging comprising:
first annular means of coupling formed on the annular part; and
second annular means of coupling formed on the annular casing (44) and cooperating with the first annular means of coupling,
wherein an oil film is formed in an annular space defined between the first means of coupling and the second means of coupling,
the first means of coupling and the second means of coupling being axially arranged between a first annular seal (66a) and a second annular seal (66b) each clamped between the annular part (48) and the annular casing (44),
the first means of coupling comprising first teeth (50) extending radially outwardly and arranged circumferentially in alternation with second teeth (56) of the second means of coupling, the second teeth extending radially inwardly,
said first teeth (50) extending axially from a first radial annular wall (54) of the annular part (48) which is arranged axially opposite axial free ends of said second teeth (56),
said second teeth (56) extending axially from a second radial annular wall (58) of the annular casing which is arranged axially opposite axial free ends of the first teeth (50),
wherein the first annular seal (66a) is radially interposed between a radially outer end of the first annular wall (54) and a radially facing cylindrical surface (64) of the annular casing (44).