| 摘要 |
A two-rotor turbine engine with an LP shaft and an HP shaft comprises a first power train between the shaft of the HP rotor and the first machines arranged so as to mechanically drive the latter, and a first coupling means and a second power train between the shaft of the LP rotor and the second machines arranged so as to drive the said second machines. The system also comprises a second coupling means between the first power train and the second power train allowing the second accessory machines to be driven by the shaft of the HP rotor, particularly when the engine operates at high speeds. More particularly, it comprises a gearbox with at least two speed ratios connected at the input to the shaft and at the output to the second power train, the first coupling means being arranged to selectively couple one or other of the two ratios or else to decouple the mechanical transmission from the shaft of the LP rotor. A control means comprising as input parameters speed signals of the two shafts of the LP and HP body and as output parameters control signals of the two coupling means |
