Drive train arrangement

1. A drive train arrangement comprising:

a rotor shaft;

a generator; and

a gear that is indirectly or directly connected to the rotor shaft and the generator,

wherein the gear is at least partly or completely integrated in the rotor shaft,

the gear comprises a planet carrier directly connected to a fixed machine support by a torsionally rigid coupling,

wherein the torsionally rigid coupling is arranged axially between the planet carrier and the machine support, the machine support being fixed to a surrounding structure,

wherein the torsionally rigid coupling creates an axial spacing between the planet carrier and the machine support,

wherein the fixed machine support, which is fixed in place, is arranged between the generator and the gear as seen in an axial direction of the rotor shaft, and on which the generator is fixed directly on a one side and the gear indirectly or directly on a side located diametrically opposite.

2. The drive train arrangement according to claim 1 , wherein the gear is connected to the rotor shaft by a torsionally rigid coupling.

3. The drive train arrangement according to claim 1 , wherein the rotor shaft is mounted on the surrounding structure by sliding bearings or rolling bearings mounted on an outside of the rotor shaft.

4. The drive train arrangement according to claim 1 , wherein the generator is connected to a driveshaft configured as an output shaft of the gear.

5. The drive train arrangement according to claim 1 , wherein the gear is configured as a planetary gear.

6. The drive train arrangement according to claim 5 , wherein the gear comprises:

at least two planetary stages, internal gears of the at least two planetary stages are fixed to one another indirectly through housing components or directly and non-rotatably, as a result of which a sequential housing group of at least the internal gears is formed.

7. The drive train arrangement according to claim 6 , wherein the gear further comprises a sun, which for driving an output shaft of the gear, is coupled to the output shaft.

8. The drive train arrangement according to claim 4 , wherein the output shaft of the gear is indirectly or directly connected to the generator by a flexible coupling.

9. The drive train arrangement according to claim 8 , wherein one of the flexible coupling or an intermediate shaft connected with the flexible coupling projects through a central opening in a machine support and is connected to the generator.

10. The drive train arrangement according to claim 8 , further comprising:

a braking device arranged between the flexible coupling and the generator.

11. The drive train arrangement according to claim 10 , wherein the braking device comprises:

a brake disc; and

a brake.

12. The drive train arrangement according to claim 11 wherein the braking device is directly connected to a machine support and indirectly or directly to the flexible coupling.

13. The drive train arrangement according to claim 9 , further comprising:

a braking device arranged between the flexible coupling and the generator.

14. The drive train arrangement according to claim 13 , wherein the braking device comprises:

a brake disc; and

a brake.

15. The drive train arrangement according to claim 14 wherein the braking device is directly connected to the machine support and indirectly or directly to the flexible coupling.

16. The drive train arrangement according to claim 1 , wherein the drive train arrangement is for a wind power plant.

17. The drive train arrangement according to claim 3 , wherein the surrounding structure is nonrotatably attached to the fixed machine support.

18. The drive train arrangement according to claim 1 , wherein the generator is directly connected to the machine support.

19. The drive train arrangement according to claim 1 , wherein the torsionally rigid coupling is arranged axially adjacent the rotor shaft.