# US 12,006,910 B2 · Assemblies for wind turbines and methods

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- Number: US 12,006,910 B2
- Document ID: US12006910B2
- Status: Granted
- Kind: B2
- Application number: 18/322,146
- Filed: 2023-05-23
- Published: 2023-11-30
- Granted: 2024-06-11
- Earliest claimed: 2022-05-25
- Assignees: General Electric Renovables Espana, S.L.
- Applicants: General Electric Renovables Espana, S.L.
- Inventors: Thomas Drots; Josep Bosch-Collado; Pablo Pozo Torres
- Web page: https://patentgrep.com/patent/US12006910B2

## CPC

- F03D 1/0691: {of the hub}
- F03D 15/20: Gearless transmission, i.e. direct-drive
- F05B 2220/7066: via a direct connection, i.e. a gearless transmission
- F05B 2230/60: Assembly methods
- F05B 2230/70: Disassembly methods
- F05B 2240/61: hollow
- F05B 2260/301: Retaining bolts or nuts
- Y02E 10/72: Wind turbines with rotation axis in wind direction
- F03D: WIND MOTORS
- F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present disclosure relates to an assembly comprising a rotor hub, a generator rotor, and a shaft for supporting the generator rotor on a stationary frame, wherein the rotor hub is configured to be removable from the generator rotor and the shaft without disassembling the generator rotor from the shaft. The present disclosure further relates to methods for assembly.

## Claims

### Claim 1

An assembly for a wind turbine comprising:
a rotor hub;
a generator rotor;
a shaft supporting the generator rotor on a stationary frame;
a plurality of main fasteners extending at least partially through the rotor hub, the generator rotor, and the shaft;
wherein the rotor hub is removable from the generator rotor and the shaft by removing the main fasteners without disassembling the generator rotor from the shaft; and
wherein the main fasteners extend through through-holes in the rotor hub and the generator rotor, and extend into blind holes in the shaft.

### Claim 2 (depends on 1)

The assembly according to claim 1, wherein the main fasteners comprise bolts with heads, wherein the heads contact and press the rotor hub against the generator rotor or the shaft.

### Claim 3 (depends on 1)

The assembly according to claim 1, wherein the blind holes comprise an inner thread.

### Claim 4 (depends on 1)

The assembly according to claim 1, wherein the through-holes and the blind holes are equally spaced and radially distributed in at least one row around a rotation axis that is common to the rotor hub, the generator rotor, and the shaft.

### Claim 5 (depends on 1)

The assembly according to claim 1, further comprising a plurality of auxiliary fasteners configured to connect the generator rotor to the shaft.

### Claim 6 (depends on 5)

The assembly according to claim 5, wherein the auxiliary fasteners are configured to temporarily connect the generator rotor to the shaft when the rotor hub is disassembled from the generator rotor and the shaft.

### Claim 7 (depends on 5)

The assembly according to claim 5, wherein auxiliary holes of the generator rotor mate with a head portion of the auxiliary fasteners and the through-holes of the rotor hub mate with a head portion of the main fasteners.

### Claim 8 (depends on 5)

The assembly according to claim 5, comprising a plurality of auxiliary holes extending through the rotor hub, the generator rotor, and into the shaft, wherein the auxiliary holes are configured to selectively receive the auxiliary fasteners.

### Claim 9 (depends on 8)

The assembly according to claim 8, wherein the auxiliary fasteners comprise a head having a diameter that is smaller than a minimum diameter of the auxiliary holes through the rotor hub and greater than a minimum diameter of the auxiliary holes through the generator rotor and into the shaft.

### Claim 10

An assembly for a wind turbine comprising:
a rotor hub;
a generator rotor;
a shaft supporting the generator rotor on a stationary frame;
a plurality of main fasteners extending at least partially through the rotor hub, the generator rotor, and the shaft;
wherein the rotor hub is removable from the generator rotor and the shaft by removing the main fasteners without disassembling the generator rotor from the shaft;
a plurality of auxiliary fasteners configured to connect the generator rotor to the shaft; and
wherein the rotor hub comprises a plurality of main holes for receipt of the main fasteners and a plurality of auxiliary holes for receipt of the auxiliary fasteners.

### Claim 11 (depends on 10)

The assembly according to claim 10, wherein the auxiliary holes comprise through-holes in the rotor hub having a minimum diameter that is greater than a diameter of holes in the generator rotor or the shaft.