US 11,946,381 B2
Stator support for a fan shaft driven by a reduction gearbox in a turbomachine
Christophe Marcel Lucien Perdrigeon, Moissy-Cramayel (FR); Didier Gabriel Bertrand Desombre, Moissy-Cramayel (FR); and Régis Eugène Henri Servant, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/029,783
Filed by Safran Aircraft Engines, Paris (FR)
PCT Filed Sep. 24, 2021, PCT No. PCT/FR2021/051656
§ 371(c)(1), (2) Date Mar. 31, 2023,
PCT Pub. No. WO2022/069824, PCT Pub. Date Apr. 7, 2022.
Claims priority of application No. 2010071 (FR), filed on Oct. 1, 2020.
Prior Publication US 2023/0407763 A1, Dec. 21, 2023
Int. Cl. F01D 25/18 (2006.01); F02C 7/06 (2006.01); F02C 7/36 (2006.01)
CPC F01D 25/18 (2013.01) [F02C 7/06 (2013.01); F02C 7/36 (2013.01); F05D 2220/32 (2013.01); F05D 2240/14 (2013.01); F05D 2240/50 (2013.01); F05D 2260/98 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A stator structure for a turbomachine, the stator structure comprising:
a support adapted to house a fan shaft bearing, the support delimiting an oil enclosure, and
a flange delimiting the oil enclosure and an air enclosure,
the stator structure extending about an axis, the axis being the axis of the turbomachine,
the support having an inner surface centered on the axis,
the flange having an outer surface centered on the axis,
the support extending around the flange so that the inner surface and the outer surface face each other,
the stator structure defining an oil circuit, the oil circuit comprising at least an upstream channel and a downstream channel, the terms upstream and downstream being defined with reference to a gas flow direction in the turbomachine in operation, and the stator structure defining an air circuit comprising at least two couples of an upstream pipe and a corresponding downstream pipe,
each upstream channel passing through the flange, from the air enclosure to the outer surface by defining an outer opening of the upstream channel in the outer surface,
each upstream pipe passing through the flange, from the air enclosure to the outer surface by defining an outer opening of the upstream pipe in the outer surface,
each downstream channel extending inside the support and opening out at the inner surface by defining an inner opening of the downstream channel, the inner opening of the downstream channel facing the outer opening of the upstream channel,
each downstream pipe extending inside the support and opening out at the inner surface by defining an inner opening of the downstream pipe, the inner opening of the downstream pipe facing the outer opening of the corresponding upstream pipe,
the oil circuit being oriented between the outer opening of the upstream channel and the inner opening of the downstream channel along a direction comprising a component radial to the axis,
the air circuit being oriented between the outer opening of an upstream pipe and the inner opening of the corresponding downstream pipe along a direction comprising a component radial to the axis.