Generator/gearbox arrangement for a wind power installation with a brake

1. A generator-gearbox arrangement for a wind turbine, the generator-gearbox arrangement comprising:

a generator comprising a stator and a rotor interacting with one another;

a functional component arranged on an end side of the generator and comprising an extension which points toward the rotor; and

a magnetic rail brake arrangement comprising component parts fastened to the extension, said magnetic rail brake arrangement designed to apply a braking action which is based on an operating principle of electromagnetic attraction between the magnetic rail brake arrangement and at least one of the rotor and the functional component,

wherein the magnetic rail brake arrangement comprises a positionally fixed grinding shoe, said rotor comprising a brake surface which is complementary to the grinding shoe.

2. The generator-gearbox arrangement of claim 1 , wherein the brake surface is provided on a support structure of the rotor.

3. The generator-gearbox arrangement of claim 1 , wherein the rotor comprises a rotor support structure and a laminated core, the generator-gearbox arrangement further comprising a hollow cylinder which bears the laminated core, and connecting elements designed to fix the hollow cylinder to a rotor hub in a rotationally fixed manner, said connecting elements designed in particular as spoke arrangements.

4. The generator-gearbox arrangement of claim 3 , wherein the brake surface is fastened to or provided on an axial portion of the hollow cylinder.

5. The generator-gearbox arrangement of claim 1 , wherein the rotor comprises a rotor support structure, said magnetic rail brake arrangement being provided on the extension of the functional component, such that the magnetic rail brake arrangement is located circumferentially in a region of a portion of the rotor support structure which portion points toward the functional component.

6. The generator-gearbox arrangement of claim 1 , further comprising a gearbox, said functional component arranged on the end side of the generator such as to point toward the gearbox.

7. The generator-gearbox arrangement of claim 1 , wherein the grinding shoe, viewed from the brake surface, has a convex configuration.

8. The generator-gearbox arrangement of claim 1 , further comprising a gearbox, wherein the gearbox and the generator are arranged directly on the functional component to create a respective end-side termination of the generator and the gearbox.

9. The generator-gearbox arrangement of claim 1 , wherein the functional component comprises, in a radially outer region, a generator flange extension and a gearbox flange extension, with the generator flange extension and the gearbox flange extension extending in axially different directions.

10. The generator-gearbox arrangement of claim 9 , wherein the generator flange extension forms a portion of a housing of the generator and/or the gearbox flange extension forms a portion of a housing of the gearbox.

11. The generator-gearbox arrangement of claim 1 , wherein the functional component comprises, in a radially inner region, a connection piece capable of forming a bearing seat.

12. The generator-gearbox arrangement of claim 11 , further comprising a gearbox comprising an output shaft which is mounted in the connection piece, said output shaft being connected to the rotor of the generator in a torque-transmitting manner.

13. A wind turbine, comprising:

a control structure; and

a generator-gearbox arrangement as set forth in claim 1 , wherein the magnetic rail brake arrangement comprises an actuator which is embedded in the control structure.