Nacelle for a wind turbine

Patent metadata

Field	Value
Publication number	US-12123403-B2
Application number	US-202218290337-A
Country	US
Kind code	B2
Filing date	May 12, 2022
Priority date	May 14, 2021
Publication date	Oct 22, 2024
Grant date	Oct 22, 2024

Abstract

A nacelle for a wind turbine includes: a nacelle housing; a rotor shaft; a rotor hub, arranged on the rotor shaft; a first rotor shaft bearing for bearing the rotor shaft on the nacelle housing; and a second rotor shaft bearing. The first rotor shaft bearing and the second rotor shaft bearing are arranged at an axial distance to one another and the first rotor shaft bearing is arranged closer to the rotor hub than the second rotor shaft bearing. The first rotor shaft bearing has a first sliding surface having an averaged first sliding surface diameter and the second rotor shaft bearing has a second sliding surface having an averaged second sliding surface diameter. The first sliding surface faces away from the rotor hub at least in some sections, wherein the first sliding surface and the second sliding surface face one another at least in a partial section.

First claim

The invention claimed is:

1. A nacelle for a wind turbine, the nacelle comprising:
a nacelle housing;
a rotor shaft;
a rotor hub, which is arranged on the rotor shaft;
a first rotor shaft bearing for bearing the rotor shaft on the nacelle housing;
a second rotor shaft bearing for bearing the rotor shaft on the nacelle housing,
wherein the first rotor shaft bearing and the second rotor shaft bearing are arranged at an axial distance to one another and wherein the first rotor shaft bearing is arranged closer to the rotor hub than the second rotor shaft bearing;
wherein the first rotor shaft bearing has a first sliding surface, which has an averaged first sliding surface diameter, and wherein the second rotor shaft bearing has a second sliding surface, which has an averaged second sliding surface diameter, wherein the first sliding surface faces away from the rotor hub at least in some sections, wherein the first sliding surface and the second sliding surface face one another at least in a partial section;
wherein a first inner ring is part of the rotor shaft and a first sliding bearing element is arranged between the first inner ring and a first outer ring and the first sliding bearing element comprises a plurality of individual first sliding bearing pads distributed over a first circumference between the first inner ring and the first outer ring, and in an operating state, the individual first sliding bearing pads are coupled to the first inner ring and rotate with the first inner ring relative to the first outer ring;
wherein a second inner ring is part of the rotor shaft and a second sliding bearing element is arranged between the second inner ring and a second outer ring and the second sliding bearing element comprises a plurality of individual second sliding bearing pads distributed over a second circumference between the second inner ring and the second outer ring and in the operating state, the individual second sliding bearing pads are coupled to the second inner ring and rotate with the second inner ring relative to the second outer ring.

2. The nacelle according to claim 1 , wherein the axial distance between the first rotor shaft bearing and the second rotor shaft bearing is measured from an innermost contact point of the first sliding surface to an innermost contact point of the second sliding surface, wherein the axial distance is between 20% and 1,000% of the averaged first sliding surface diameter.

3. The nacelle according to claim 2 , wherein the axial distance is between 50% and 500% of the averaged first sliding surface diameter.

4. The nacelle according to claim 2 , wherein the axial distance is between 90% and 300% of the averaged first sliding surface diameter.

5. The nacelle according to claim 2 , wherein the axial distance is between 120% and 200% of the averaged first sliding surface diameter.

6. The nacelle according to claim 1 , wherein the first sliding surface is conical and wherein the second sliding surface is conical, wherein an imaginary extension line of the first sliding surface and an imaginary extension line of the second sliding surface intersect and combine to form a V-shape.

7. The nacelle according to claim 1 , wherein the first sliding surface is configured in the form of a first spherical cap and wherein the second sliding surface is configured in the form of a second spherical cap, wherein the first sliding surface forms a first spherical cap arc in longitudinal section and wherein the second sliding surface forms a second spherical cap arc in longitudinal section, wherein an imaginary extension line of a first tangent to a first spherical cap arc center and an imaginary extension line of a second tangent to a second spherical cap arc center intersect and combine to form a V-shape.

8. The nacelle according to claim 1 , further comprising a gearbox torque-coupled to the rotor shaft, wherein the weight of the gearbox is at least partially carried by the second rotor shaft bearing.

9. The nacelle according to claim 1 , wherein the averaged first sliding surface diameter is larger than the averaged second sliding surface diameter.

10. The nacelle according to claim 9 , wherein the averaged second sliding surface diameter amounts to between 50% and 90% of the averaged first sliding surface diameter.

11. The nacelle according to claim 9 , wherein the averaged second sliding surface diameter amounts to between 70% and 80% of the averaged first sliding surface diameter.

12. A nacelle for a wind turbine, the nacelle comprising:
a nacelle housing;
a rotor shaft;
a rotor hub, which is arranged on the rotor shaft;
a first rotor shaft bearing for bearing the rotor shaft on the nacelle housing;
a second rotor shaft bearing for bearing the rotor shaft on the nacelle housing,
wherein the first rotor shaft bearing and the second rotor shaft bearing are arranged at an axial distance to one another and wherein the first rotor shaft bearing is arranged closer to the rotor hub than the second rotor shaft bearing;
wherein the first rotor shaft bearing has a first outer ring and wherein the second rotor shaft bearing has a second outer ring, and wherein the first rotor shaft bearing has a first inner ring and wherein the second rotor shaft bearing has a second inner ring,
wherein a first sliding surface is arranged between the first outer ring and the first inner ring on first sliding bearing pads, and
wherein a second sliding surface is arranged between the second outer ring and the second inner ring on second sliding bearing pads, wherein in an operating state, the second sliding bearing pads are coupled to the second inner ring and rotate with the second inner ring relative to the second outer ring, wherein the first outer ring and the second outer ring are arranged fixed to one another in their position and wherein the first inner ring is arranged fixed to the rotor shaft in its position and wherein the second inner ring carrying the second bearing pads or a second sliding bearing element comprising the second sliding bearing pads is pretensioned in the axial direction towards the first inner ring by means of a tensioning means.

13. The nacelle according to claim 12 , wherein the tensioning means takes the form of a shaft nut.

14. The nacelle according to claim 12 , wherein the first outer ring is accommodated in a first bearing block and the second outer ring is accommodated in a second bearing block.

Assignees

• Miba Gleitlager Austria Gmbh

Inventors

• Hoelzl Johannes Sebastian

Classifications

• F05B2240/14

  Casings, housings, nacelles, gondels or the like, protecting or supporting assemblies there within · CPC title

• F05B2260/301

  Retaining bolts or nuts · CPC title

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title

• F16C23/048

  for axial load mainly · CPC title

• F16C23/04

  self-adjusting · CPC title