US 11,891,967 B2
Turbofan comprising a power supply device to drive the compressor
Henri Yesilcimen, Moissy-Cramayel (FR); Caroline Marie Frantz, Moissy-Cramayel (FR); Nicolas Jérôme Jean Tantot, Moissy-Cramayel (FR); Nathalie Nowakowski, Moissy-Cramayel (FR); Gilles Alain Marie Charier, Moissy-Cramayel (FR); Kévin Morgane Lemarchand, Moissy-Cramayel (FR); and Jonathan Evert Vlastuin, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/277,801
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Sep. 20, 2019, PCT No. PCT/FR2019/052211
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/058652, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 1858586 (FR), filed on Sep. 21, 2018; and application No. 1858588 (FR), filed on Sep. 21, 2018.
Prior Publication US 2021/0317800 A1, Oct. 14, 2021
Int. Cl. F02K 5/00 (2006.01); F02C 6/20 (2006.01); F02K 3/00 (2006.01); F01D 15/10 (2006.01); F02K 3/06 (2006.01); B64D 27/02 (2006.01)
CPC F02K 5/00 (2013.01) [F01D 15/10 (2013.01); F02C 6/20 (2013.01); F02K 3/00 (2013.01); F02K 3/06 (2013.01); B64D 2027/026 (2013.01); F05D 2220/323 (2013.01); F05D 2220/70 (2013.01); F05D 2220/76 (2013.01); F05D 2260/40311 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A turbofan, comprising a fan, a casing positioned downstream of the fan and separating a primary flowpath from a secondary flowpath, a compressor, a combustion chamber and a turbine being arranged in the primary flowpath, the turbofan comprising a differential transmission coupled to the turbine, and a power supply device configured to provide additional power to that provided by the turbine to drive the compressor, wherein the differential transmission comprises a first reduction gear configured to modify the rotation speed transmission ratio between the turbine and the fan and a second reduction gear configured to modify the rotation speed transmission ratio between the turbine and the compressor, the second reduction gear being coupled to an output of the first reduction gear different from an output coupled to fan.