초록 ▼

A turbopropeller, or turbofan, gas turbine engine comprising a single spool core engine arranged to drive a propeller, or a fan, via gear means may be provided with a starter motor, and a clutch means. The clutch means disengages the propeller, or fan, from the gear means and core engine when the co

A turbopropeller, or turbofan, gas turbine engine comprising a single spool core engine arranged to drive a propeller, or a fan, via gear means may be provided with a starter motor, and a clutch means. The clutch means disengages the propeller, or fan, from the gear means and core engine when the core engine is at rest or running below a predetermined speed to allow easy starting of the core engine by the starter motor. The clutch means engages the propeller, or fan, with the gear means and core engine when the core engine is running at or above the predetermined speed. An axially moveable piston may be provided to brake the propeller when the clutch means has disengaged the propeller from the core engine.

대표청구항 ▼

A gas turbine engine comprising a core engine having in flow series a compressor means, combustor means and turbine means, the turbine means and compressor means being coaxial and the turbine means being arranged to drive the compressor means, a rotor having a plurality of blades, the rotor being ar

A gas turbine engine comprising a core engine having in flow series a compressor means, combustor means and turbine means, the turbine means and compressor means being coaxial and the turbine means being arranged to drive the compressor means, a rotor having a plurality of blades, the rotor being arranged coaxial with the turbine means, shaft means and gear means, the turbine means being arranged to drive the compressor means via the shaft means, the turbine means being arranged to drive the rotor via the shaft means and the gear means, the gear means comprising a first reduction gear assembly and a second reduction gear assembly, the first reduction gear assembly comprising a first sun gear, a plurality of first planet gears, a first carrier means and a first annulus gear, the first sun gear being provided on and being driven by the shaft means, the plurality of first planet gears meshing with the first sun gear, the first annulus gear surrounding and meshing with the first planet gears, the first planet gears being rotatably mounted on the first carrier means, the second reduction gear assembly comprising a second sun gear, a plurality of second planet gears, a second carrier means and a second annulus gear, the second sun gear being provided on and being driven by the first carrier means, the plurality of second planet gears meshing with the second sun gear, the second annulus gear surrounding and meshing with the second planet gears, the second planet gears being rotatably mounted on the second carrier means, the second carrier means being drivingly connected to the rotor, a starter means being arranged to drive the shaft means in order to start the core engine, a clutch means being arranged to disengageably connect the first and second annulus gears, the clutch means being arranged to allow the turbine means to drive the rotor via the gear means when the core engine is running at or above a predetermined speed, and to prevent the turbine means driving the rotor via the gear means when the core engine is running below the predetermined speed or is at rest to allow easy starting of the core engine by the starter means.