Wind turbine gearbox and method for producing a wind turbine gearbox

1. A wind turbine gearbox having at least one gear which is mounted on an axle,

wherein a sliding surface is arranged between the gear and the axle or between the axle and an axle holder,

wherein the sliding surface is arranged on at least one layer of a deposition welded material made of a sliding bearing material,

wherein the layer of the deposition welded material is applied directly to an outer shell surface of the axle, and

wherein an offset is arranged on the axle and the layer of the deposition welded material is applied directly to the end face of the offset.

2. The wind turbine gearbox according to claim 1 , wherein the gear is designed as a planetary gear.

3. The wind turbine gearbox according to claim 1 , wherein the deposition welded material consists of or comprises a material selected from a group comprising aluminum base alloys, tin base alloys, bronze base alloys, brass base alloys.

4. The wind turbine gearbox according to claim 1 , wherein the deposition welded material consists of or comprises a material which comprises at least two materials selected from a group comprising aluminum, tin, bronze, brass.

5. A wind turbine having a rotor and a generator, wherein a wind turbine gearbox, which is operatively connected to the rotor and the generator is arranged between the rotor and the generator, wherein the wind turbine gearbox is designed according to claim 1 .

6. A wind turbine gearbox 4 having at least one gear which is mounted on an axle,

wherein a sliding surface is arranged between the gear and the axle or between the axle and an axle holder,

wherein the sliding surface is arranged on at least one layer of a deposition welded material made of a sliding bearing material,

wherein the layer of the deposition welded material is applied directly to an inner shell surface of a bore of the gear, and

wherein the layer of the deposition welded material is applied directly to the end face of the gear.

7. A wind turbine gearbox having at least one gear which is mounted on an axle,

wherein a sliding surface is arranged between the gear and the axle or between the axle and an axle holder,

wherein the sliding surface is arranged on at least one layer of a deposition welded material made of a sliding bearing material,

wherein a sliding bearing bush is arranged between the gear and the axle, wherein the layer of the deposition welded material is applied directly to the sliding bearing bush.

8. The wind turbine gearbox according to claim 7 , wherein the layer of the deposition welded material is applied directly to an inner shell surface of the sliding bearing bush and the sliding bearing bush is held in a bore of the gear.

9. The wind turbine gearbox according to claim 7 , wherein the layer of the deposition welded material is applied directly to an outer shell surface of the sliding bearing bush and the sliding bearing bush is held on the axle.

10. The wind turbine gearbox according to claim 7 , wherein the layer of the deposition welded material is applied directly to the end face of the sliding bearing bush.

11. A wind turbine gear box having at least one gear which is mounted on an axle,

wherein a sliding surface is arranged between the gear and the axle or between the axle and an axle holder,

wherein the sliding surface is arranged on at least one layer of a deposition welded material made of a sliding bearing material, and

wherein the layer of the deposition welded material has a layer thickness of between 0.5 mm and 1.5 mm.

12. A wind turbine gear box having at least one gear which is mounted on an axle,

wherein a sliding surface is arranged between the gear and the axle or between the axle and an axle holder,

wherein the sliding surface is arranged on at least one layer of a deposition welded material made of a sliding bearing material, and

wherein the sliding surface has, on the layer of the deposition welded material, an averaged roughness depth R z of between 0.1 μm and 3.2 μm.

13. A wind turbine gearbox having at least one gear which is mounted on an axle,

wherein a sliding surface is arranged between the gear and the axle or between the axle and an axle holder,

wherein the sliding surface is arranged on at least one layer of a deposition welded material made of a sliding bearing material, and

wherein at least two layers of the deposition welded material, offset to one another at an axial distance, are formed of different materials.

14. The wind turbine gear box according to claim 13 ,

wherein at least three layers of the deposition welded material, offset to one another at an axial distance, are formed of different materials, and

wherein the materials of the two outer layers of the at least three layers have a lower degree of compressive strength than the material of an intermediate layer.

15. A method for producing a wind turbine gearbox having at least one gear which is mounted on an axle, wherein a sliding surface is arranged between the gear and the axle, wherein the method comprises the following steps:

providing the gear or the axle or a sliding bearing bushing;

deposition welding of a sliding bearing material and with that, depositing a layer of a deposition welded material directly onto the gear or the axle or a sliding bearing;

forming the sliding surface on the layer;

wherein when deposition welding, the layer is applied having a raw layer thickness of between 1 mm and 5 mm, and

wherein the layer of the deposition welded material is removed, in a subsequent processing step by machining, to a layer thickness of between 0.5 mm and 1.5 mm.

16. The method according to claim 15 , wherein the deposition welding and the machining are carried out in one workpiece setting.