Twin spool turbine engine with power take-off means on the low-pressure and high-pressure rotors, and power take-off module for the turbine engine
View Patent ↗The invention relates to a twin spool turbine engine comprising a high-pressure rotor and a low-pressure rotor, at least one accessory gearbox, a drive means, driving coaxial transmission shafts that transmit movement to the accessory gearbox, characterized in that the drive means comprises a high-pressure drive pinion secured to the high-pressure rotor near its upstream end, a low-pressure drive pinion secured to the low-pressure rotor upstream of the high-pressure rotor, and a power take-off module in direct mesh with the drive pinions, driving the transmission shafts. By virtue of the invention, the transmission shafts run coaxial with one another and therefore pass through a single arm. The use of a power take-off module simplifies the mechanism. The turbine engine is simpler to assemble.
1. A twin spool turbine engine comprising:
a high-pressure rotor,
a low-pressure rotor,
at least one accessory gearbox,
drive means for driving coaxial transmission shafts that transmit movement to the accessory gearbox, wherein the drive means comprises a high-pressure drive pinion secured to the high-pressure rotor near its upstream end, a low-pressure drive pinion secured to the low-pressure rotor upstream of the high-pressure rotor, and
a power take-off module in direct mesh with the drive pinions, driving the transmission shafts, wherein said power take-off module comprises a cylindrical portion secured to said coaxial transmission shafts and a frustroconical portion extending internally from said cylindrical portion, said power take-off module further comprising a high pressure take-off pinion secured to said frustroconical portion and in direct mesh with said high-pressure drive pinion, and a low pressure take-off pinion secured to said frustroconical portion and in direct mesh with said low-pressure drive pinion.
2. A turbine engine according to claim 1 , wherein the transmission shafts are fitted into the power take-off module.
3. A turbine engine according to claim 1 , wherein said low-pressure power take-off pinion is coaxial with the high-pressure power take-off pinion.
4. A turbine engine according to claim 1 , wherein the turbine engine includes a fixed structure and the power take-off pinions are secured to end pieces, the power take-off module and said end pieces are contained in a box secured to the fixed structure of the turbine engine.
5. A turbine engine according to claim 4 , wherein the transmission shafts are in mesh with the end pieces via splines.
6. A turbine engine according to claim 1 , wherein the diameter of the high-pressure drive pinion is smaller than the diameter of the low-pressure drive pinion.
7. A turbine engine according to claim 1 , wherein the high-pressure drive pinion is situated upstream of the upstream bearing of the high-pressure rotor and the low-pressure drive pinion is situated downstream of the downstream bearing of the low-pressure compressor shaft of the low-pressure rotor.
8. A turbine engine according to claim 1 which is a jet engine, in which the transmission shafts run along one structural arm of the intermediate casing.
9. A turbine engine according to claim 1 , further comprising a box having a frustroconical shape and containing said frustroconical portion of said power take-off module, said box being secured to a fixed structure for said turbine engine.
10. A turbine engine according to claim 1 , wherein said coaxial transmission shafts are not at right angles with respect to an axis of said turbine engine, said high-pressure and low-pressure rotors being configured to rotate around said axis.
11. A twin spool turbine engine comprising:
a high-pressure rotor,
a low-pressure rotor,
at least one accessory gearbox,
a drive means for driving coaxial transmission shafts that transmit movement to the accessory gearbox, wherein the drive means comprises a high-pressure drive pinion secured to the high-pressure rotor near its upstream end, a low-pressure drive pinion secured to the low-pressure rotor upstream of the high-pressure rotor, and
a power take-off module in direct mesh with the drive pinions, driving the transmission shafts, wherein said power take-off module is a preassembled module mounted on said turbine engine as a unit comprising a high pressure take-off pinion configured to be in direct mesh with said high-pressure drive pinion, and a low pressure take-off pinion configured to be in direct mesh with said low-pressure drive pinion.