US 12,252,999 B2
Lubrication of bearings of a turbomachine shaft
Romain Quinton, Moissy-Cramayel (FR); Serge Marie Gabriel Cot, Moissy-Cramayel (FR); and Jean-Paul Salvador Lopez, Moissy-Cramayel (FR)
Assigned to SAFRAN POWER UNITS, Toulouse (FR)
Appl. No. 18/573,938
Filed by SAFRAN POWER UNITS, Toulouse (FR)
PCT Filed Jun. 28, 2022, PCT No. PCT/FR2022/051288
§ 371(c)(1), (2) Date Dec. 22, 2023,
PCT Pub. No. WO2023/275487, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 2107150 (FR), filed on Jul. 1, 2021.
Prior Publication US 2024/0209752 A1, Jun. 27, 2024
Int. Cl. F02C 7/06 (2006.01); F01D 25/16 (2006.01); F01D 25/18 (2006.01); F01D 25/26 (2006.01)
CPC F01D 25/18 (2013.01) [F01D 25/16 (2013.01); F05D 2240/50 (2013.01); F05D 2260/98 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An assembly for a gas turbine comprising:
at least one bearing around an axis of rotation;
a hollow central shaft which is guided in rotation by the at least one bearing; and
a device for lubricating said at least one bearing, the device comprising:
a hollow lubricant delivery tube arranged in the hollow central shaft and configured to convey lubricant to said at least one bearing, said hollow lubricant delivery tube being arranged to be fixed in rotation relative to the axis of rotation, the hollow lubricant delivery tube having:
a first section with a first diameter; and
a second section with a second diameter that is greater than the first diameter, wherein the second section comprises:
a plurality of radial channels connecting a longitudinal channel inside of the lubricant delivery tube to a radially inner wall of the hollow central shaft so as to form a lubricant film between said second section of the hollow lubricant delivery tube and said radially inner wall of the hollow central shaft.