摘要:
The invention aims to optimise all of the engine power available on a helicopter provided with an auxiliary engine by allowing that auxiliary engine to provide non-propulsive and/or propulsive energy during flight. For this purpose, this auxiliary engine is coupled in such a way as to be able to directly contribute to the supply of propulsive mechanical or electrical energy and non-propulsive electrical energy of the aircraft. An example configuration architecture comprises an onboard electrical network (2), two main engines (5a, 5b) and an energy conversion system for converting mechanical/electrical energy (6, 6a, 6b, 7) between a main gearbox BTP (40) transferring power to the propulsion members (4, 41) and means for receiving electrical energy comprising the onboard network (2) and a power electronics system (9) linked with starters (8) of the main engines (5a, 5b). The configuration also comprises an auxiliary power engine (3) supplying electrical energy to the means for receiving electrical energy (2, 9) via the energy conversion system (6, 6a, 6b, 7) and mechanical coupling means (8a, 11a to 11d) between the auxiliary engine (3, 0, 30) and at least one propulsion means (4, 41).
摘要:
The aim of the invention is to optimize the entirety of the drive power available in a helicopter by using an auxiliary motor to supply power to the equipment and accessories of the helicopter that are connected to the engines. In an example of an optimized power transfer architecture for implementing the invention, the main engines (1, 1') and the APU group (8), as an auxiliary motor, comprise a gas generator (2; 81) connected, for the main engines (1, 1'), to the gearboxes (6) and accessory boxes (7) of mechanical, electric, and/or hydraulic power sockets, and connected, for the APU group (8), to at least one power conversion member (83, 84, 11). The power conversion member (83, 84, 11) of the APU group (8) is connected to the equipment and accessories via the gearbox (6) and/or via the accessory box (7) of the main engines (1, 1').
摘要:
The invention relates to a turbine engine (100) for a helicopter (200), said helicopter comprising a main gearbox, a rotor (204), and a speed-reducing device (206) that is placed entirely within the main gearbox (202) of the helicopter while being connected to said rotor, the turbine engine including a casing (102), a gas generator (114) having a gas generator shaft (115), and a free turbine (124) to be rotated by the gas flow generated by the gas generator, said free turbine comprising a free turbine shaft (128). According to the turbine engine of the invention, when the casing of the turbine engine is attached to the body of the helicopter, the free turbine shaft axially extends inside the main gearbox of the helicopter so as to be directly connected to the speed-reducing device.
摘要:
The invention relates to a system (12) for recovering exhaust gas energy from at least one turboshaft engine, comprising a turbine (34) rotatably mounted about a recovery shaft (40), suitable for collecting at least one portion (14) of the exhaust gases, referred to as collected gases (14), and to expand said collected gases (14) into expanded gases (42) at a pressure lower than the atmospheric pressure, a first heat exchanger (44), suitable for cooling said expanded gases (42) into cooled gases (46), by means of a cold source (45), and a compressor (36) rotatably mounted about said recovery shaft (40), suitable for compressing said cooled gases (46) to atmospheric pressure.
摘要:
The invention aims to get around the problems of size, mass or reliability. To do this, energy is recovered in the exhaust nozzle, converted and recirculated using mechanical and/or electrical power recombining means. An example of an architecture of a turbomachine according to the invention includes a main turbine engine (1) and a heat exchanger (18) positioned in the exhaust nozzle (70) and coupled, via pipes (18a and 18b), to an independent system (16) that converts thermal energy into mechanical energy. This independent system (16) is connected to localized (Z1) mechanical recombination means (20) via a power shaft (15) to supply power to a power transmission shaft (80) according to aircraft requirements.
摘要:
The invention relates to a turbine engine (10) particularly for a helicopter, which comprises a gas generator (12) and a free turbine (14) rotated by a gas flow (F) generated by the gas generator, wherein the turbine engine further includes a reversible electric machine (30) that can be coupled to the gas generator, said reversible electric machine being capable of rotating the gas generator (12) during the starting phase of the turbine engine. The invention is characterised in that the reversible electric machine (30) can also be coupled to the free turbine (12) after the starting phase of the turbine engine in order to generate electric power.
摘要:
The invention relates to the field of mechanical protection devices comprising a transmission shaft (1) with a main axis of rotation (X) and an element (2) that can rupture in the event of a torsional overload, and in particular to a mechanical protection device further comprising a mobile part (3) secured to the transmission shaft (1) in rotation about the main axis (X) and able to move radially outwards with respect to the main axis (X) from a first position to a second position, a spring (4) for urging the mobile part (3) towards the first position, and a tangential end stop (8) able to arrest the rotation of the mobile part (3) about the main axis (X) when the mobile part (3) is in the second position. The mobile part (3) and the spring (4) are calibrated so that once a predetermined triggering angular velocity has been reached, the mobile part (3) moves from the first into the second position under the effect of a centrifugal force that is stronger than the preload of the spring (4).