US 12,071,853 B2
Free-turbine turbomachine comprising equipment driven by the free turbine
Loïs Pierre Denis Vive, Moissy-Cramayel (FR); Thomas Drouin, Moissy-Cramayel (FR); and Olivier Bedrine, Moissy-Cramayel (FR)
Assigned to SAFRAN HELICOPTER ENGINES, Bordes (FR)
Appl. No. 18/553,819
Filed by SAFRAN HELICOPTER ENGINES, Bordes (FR)
PCT Filed Mar. 31, 2022, PCT No. PCT/FR2022/050612
§ 371(c)(1), (2) Date Oct. 3, 2023,
PCT Pub. No. WO2022/214757, PCT Pub. Date Oct. 13, 2022.
Claims priority of application No. 2103596 (FR), filed on Apr. 8, 2021.
Prior Publication US 2024/0183283 A1, Jun. 6, 2024
Int. Cl. F01D 15/12 (2006.01); B64D 27/10 (2006.01); F02C 7/26 (2006.01); F02C 7/268 (2006.01); F02C 7/32 (2006.01)
CPC F01D 15/12 (2013.01) [B64D 27/10 (2013.01); F02C 7/268 (2013.01); F02C 7/32 (2013.01); F05D 2220/76 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A turbomachine including a gas generator comprising a first mechanical shaft, an accessory gear box, at least one reversible electric machine coupled to the accessory gear box, a free turbine provided with a second mechanical shaft and rotationally driven by a stream of gas generated by the gas generator, and at least one accessory coupled to the accessory gear box,
wherein the turbomachine further comprises a first mechanical coupling means configured to mechanically couple said first mechanical shaft to the accessory gear box in a first configuration of the first mechanical coupling means and to mechanically uncouple said first mechanical shaft from the accessory gear box in a second configuration of the first mechanical coupling means, and a second mechanical coupling means configured to mechanically couple said second mechanical shaft to the accessory gear box in a first configuration of the second mechanical coupling means and to mechanically uncouple said second mechanical shaft from the accessory gear box in a second configuration of the second mechanical coupling means, the electric machine being dimensioned to drive the gas generator and said at least one accessory during the start-up of the turbomachine.