Safran Helicopter Engines

Thomas Drouin

Camel Serghine

Loïs Pierre Denis Vive

Olivier Bedrine

Laurent Pierre Tarnowski

Sébastien Combebias

Vincent Duqueine

Michael Derderian

Didier Claude Chartrain

Disclosed is a turbogenerator, in particular for an electrically-driven rotary wing aircraft, comprising a gas generator equipped with a first shaft, at least one reversible electrical machine, and a free turbine provided with a second shaft and caused to rotate by a gas flow generated by the gas generator. The second shaft is coupled to the at least one electrical machine during all phases of operation of the turbomachine, and the turbomachine further comprises a single mechanical coupling means for coupling the first mechanical shaft to the second mechanical shaft when the electrical machine is operating in motor mode and mechanically uncoupling the first mechanical shaft from the second mechanical shaft when the electrical machine is operating in generator mode.

Free turbine turbogenerator comprising a reversible electrical machine coupled to the free turbine

Disclosed is a turbomachine, comprising a gas generator () equipped with a first shaft (), at least one reversible electrical machine (), a free turbine () provided with a second shaft () and caused to rotate by a gas flow generated by the gas generator (), an accessory gear box () and at least one accessory (). Said at least one electrical machine () is mechanically coupled to said second mechanical shaft () via the accessory gear box () during all phases of operation of the turbomachine (), the accessory gear box () is coupled to the at least one accessory () and the turbomachine () further comprises a single mechanical coupling means () for mechanically coupling said first mechanical shaft () to the accessory gear box () in a first configuration and mechanically uncoupling said first mechanical shaft () from the accessory gear box () in a second configuration.

Free turbine turbomachine comprising equipment driven by the free turbine

A turbomachine including a gas generator endowed with a first shaft, a gear box, at least one reversible electric machine coupled to the gear box, and a free turbine endowed with a second shaft and rotationally driven by a gas stream of the gas generator and at least one accessory coupled to the accessory gear box, wherein the turbomachine includes a first mechanical coupling means configured to mechanically couple said first mechanical shaft to the accessory gear box in a first configuration and to mechanically uncouple said first mechanical shaft from the accessory gear box in a second configuration, and a second mechanical coupling means configured to mechanically couple said second mechanical shaft to the accessory gear box in a first configuration and to mechanically uncouple said second mechanical shaft from the accessory gear box in a second configuration.

Free-turbine turbomachine comprising equipment driven by the free turbine

A turbomachine, particularly for a rotary-wing aircraft, including a gas generator provided with a rotary shaft, a first reversible electric machine, a power turbine rotationally driven by a stream of gas generated by the gas generator, at least one accessory from among an oil pump and a fuel pump, an accessory gearbox comprising a gear train configured to drive said at least one accessory, and a second electric machine. The second electric machine is reversible, said first electric machine is mechanically coupled to the gas generator, the accessory gearbox and the second electric machine are mechanically coupled to the power turbine, and the turbomachine is devoid of any kinematic coupling between the gear train of the accessory gearbox and the shaft of the gas generator.

Growing community of inventors

Moissy-Cramayel, France

Thomas Drouin