Propulsion unit with selective coupling means
AssigneeSafran Helicopter Engines
InventorsOlivier LAFARGUE, Didier CHARTRAIN, Camel SERGHINE
Life of this patent
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Abstract
A propulsion unit, notably for an aircraft, including a turbomachine; a propeller that can be selectively coupled to the turbomachine; a rotary electrical machine able to drive at least the turbomachine, and selective coupling of the rotary electric machine to the propeller and/or the turbomachine that is able to couple only the propeller to the rotary electrical machine during a defined stage of operation of the propulsion unit and that is able to couple or not couple the rotary electric machine to a gas generator and/or a free turbine of the turbomachine.
Claims10
1-9. (canceled)
A propulsion unit, comprising:
- a turbomachine;
- a propeller that can be selectively coupled to said turbomachine;
- a rotary electrical machine that can drive at least the turbomachine, and
- means of selective coupling of the rotary electric machine to the propeller and/or the turbomachine, that can couple the propeller only to the rotary electrical machine during a defined operation step of the propulsion unit,
- wherein the turbomachine includes a free turbine turboprop, comprising a gas generator and a free turbine driven in rotation by the gas flow generated by the gas generator,
- wherein the selective coupling means are capable of coupling or not coupling the rotary electrical machine to the gas generator and/or the free turbine.
Dependencies are inferred from the claim text.