DRIVE CHAIN FOR A HELICOPTER INCORPORATING A PYROTECHNIC ASSISTANCE DRIVE MODULE AND HELICOPTER COMPRISING THE SAME

摘要

The invention relates to a drive chain for driving the rotor(s) (21, 22) of a helicopter, comprising a main transmission gearbox (24) capable of driving the rotor(s) (21, 22) when said gearbox is moving, a main engine (23) for providing the power for the flight, and at least one assistance drive module (31), the main engine (23) and the assistance drive module (31) being mechanically connected to said main transmission gearbox (24) so as to induce the movement of said gearbox. The drive chain is characterised in that the assistance drive module comprises a pyrotechnic device for generating a torque on a power transmission shaft that is mechanically connected to the main transmission gearbox (24). The invention also relates to a helicopter comprising said drive chain.

主权项

1. A drive chain for driving the rotor(s) of a helicopter, comprising a main transmission gearbox capable of driving the rotor(s) when said gearbox is moving, a main engine for providing the power for the flight, and at least one assistance drive module, the main engine and the assistance drive module being mechanically connected to said main transmission gearbox so as to induce the movement of said gearbox, wherein said assistance drive module comprises:
at least one flyer that can rotate about an axis of symmetry, said flyer comprising a drum that is rigidly connected to a power transmission shaft mechanically connected to the power transmission gearbox, at least one gas ejection nozzle located on the periphery of the drum and oriented substantially tangentially to the rotation about said axis of symmetry, a pyrotechnic gas generation device which is installed in the flyer and feeds said at least one exhaust nozzle.