Wind turbine gearbox

Patent metadata

Field	Value
Publication number	US-9784245-B2
Application number	US-201414763383-A
Country	US
Kind code	B2
Filing date	Jan 27, 2014
Priority date	Jan 30, 2013
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

The invention relates to a wind turbine gearbox ( 1 ) having at least one gearwheel ( 2 ) which is mounted on an axle ( 5 ), wherein a bearing point with a plain bearing ( 4 ) is arranged between the gearwheel ( 2 ) and the axle ( 5 ), and wherein, in the axle ( 5 ), there is formed a recess for the supply of a lubricant to the plain bearing ( 4 ). In the region of a contact surface of the plain bearing ( 4 ), a groove ( 18 ) is formed in the gearwheel ( 2 ) or an intermediate space ( 7 ) is formed between the plain bearings ( 4 ), which groove or intermediate space is connected via at least one connecting line ( 16 ) to the surrounding atmosphere.

First claim

The invention claimed is:

1. A wind turbine gearbox having at least one gearwheel, which is mounted on an axle, wherein a bearing point with a plain bearing is arranged between the gear-wheel and the axle, wherein in the axle a recess is formed for supplying a lubricant to the plain bearing, wherein in the region of a bearing surface of the plain bearing on the gearwheel a groove is formed in the gearwheel and the groove is connected via at least one connecting line to the surrounding atmosphere, and wherein the connecting line is formed in the axle.

2. The wind turbine gearbox as claimed in claim 1 , wherein the axle is designed at least partly as a hollow axle.

3. The wind turbine gearbox as claimed in claim 1 , wherein at least a portion of the lubricant can be removed from the plain bearing area via the connecting line in the axle.

4. The wind turbine gearbox as claimed in claim 1 , wherein a ratio of a width of the bearing point in an axial direction to a diameter of the axle in a radial direction is a maximum of 2.

5. The wind turbine gearbox as claimed in claim 1 , wherein a width of the groove in an axial direction is selected from a range of 5% to 90% of a width of the plain bearing in the axial direction.

6. The wind turbine gearbox as claimed in claim 1 , wherein a height of the groove in a radial direction is selected from a range of 5% to 100% of a wall thickness of the plain bearing.

7. A wind turbine gearbox having at least one gearwheel, which is mounted on an axle, wherein a bearing point with plain bearings is arranged between the gear-wheel and the axle, which plain bearings are spaced apart from one another in an axial direction forming an intermediate space, wherein in the axle a recess is formed for supplying a lubricant to the plain bearings, wherein the intermediate space is connected to the surrounding atmosphere via at least one connecting line, wherein the connecting line is formed in the axle, and wherein in the region of each plain bearing at least one recess is provided for supplying the lubricant.

8. The wind turbine gearbox as claimed in claim 7 , wherein a width of the intermediate space in the axial direction is selected from a range of 5% to 90% of a width of a plain bearing in the axial direction.

9. The wind turbine gearbox as claimed in claim 7 , wherein a height of the intermediate space in a radial direction is selected from a range of 5% to 100% of a wall thickness of a plain bearing.

Assignees

• Miba Gleitlager Austria Gmbh

Inventors

• Hager Gunther
• Hoelzl Johannes Sebastian
• Kari Alexander

Classifications

• F16C37/002

  of fluid bearings · CPC title

• F03D15/10

  using gearing not limited to rotary motion, e.g. with oscillating or reciprocating members · CPC title

• F03D80/70 Primary

  Bearing or lubricating arrangements · CPC title

• F16H57/043

  within rotary parts, e.g. axial channels or radial openings in shafts · CPC title

• F16H57/08

  of gearings with members having orbital motion · CPC title