# US 11,078,888 B2 · Wind turbine transmission

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- Number: US 11,078,888 B2
- Document ID: US11078888B2
- Status: Granted
- Kind: B2
- Application number: 16/322,839
- Filed: 2017-08-02
- Published: 2019-06-20
- Granted: 2021-08-03
- Earliest claimed: 2016-08-04
- Assignees: Flender GmbH
- Applicants: Flender GmbH
- Inventors: Arno Klein-Hitpass
- Web page: https://patentgrep.com/patent/US11078888B2

## CPC

- F03D 15/00: Transmission of mechanical power
- F03D 80/70: Bearing or lubricating arrangements
- F16H 1/46: Systems consisting of a plurality of gear trains each with orbital gears, {i.e. systems having three or more central gears}
- F03D 80/50: Maintenance or repair
- F05B 2260/40311: of the epicyclic, planetary or differential type
- Y02E 10/72: Wind turbines with rotation axis in wind direction
- F03D: WIND MOTORS
- F16H: GEARING
- 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

A wind turbine transmission includes a high-speed spur gear stage which includes a HSS spur gear and an HSS pinion meshing therewith on a HSS pinion shaft. The HSS spur gear is directly mounted in a transmission housing of the wind turbine transmission. A sun gear shaft of a transmission stage, which is mounted upstream of the high-speed spur gear stage, is directly coupled to the HSS spur gear.

## Claims

### Claim 1

A wind turbine transmission, comprising:
a transmission housing having a rotor side and a generator side;
a carrier element connected to the generator side of the transmission housing and comprising a circumferential web projecting axially away from the generator side toward the rotor side;
a high-speed spur gear stage directly mounted in the transmission housing and comprising an HSS (High Speed Stage) spur gear having an outer circumference carrying a ring gear meshing with an HSS pinion shaft and an interior generator-side circumferential recess in which the web projects, and a bearing arranged between an inner circumference of the ring gear and the web, said HSS spur gear having a rotor-side hub configured to engage with a coupling connecting the HSS spur gear with an intermediate-stage (IMS) sun gear shaft arranged upstream of the high-speed spur gear stage.

### Claim 2 (depends on 1)

The wind turbine transmission of claim 1, wherein the HSS pinion shaft forms an output shaft of the wind turbine transmission.

### Claim 3 (depends on 1)

The wind turbine transmission of claim 1, wherein the HSS spur gear is mounted on one side of the transmission housing.

### Claim 4 (depends on 1)

The wind turbine transmission of claim 1, wherein the HSS spur gear is mounted in the transmission housing on a rotor side or on a generator side.

### Claim 5 (depends on 1)

The wind turbine transmission of claim 1, wherein the HSS spur gear is forged, welded or screwed from a plurality of elements or produced from a solid body by means of a cutting method.

### Claim 6

A wind turbine transmission, comprising:
a transmission housing having a rotor side and a generator side;
a carrier element connected to the generator side of the transmission housing and comprising a circumferential web projecting axially away from the generator side toward the rotor side;
a high-speed spur gear stage directly mounted in the transmission housing and comprising an HSS (High Speed Stage) spur gear having a rotor-side hub and an outer circumference carrying a ring gear meshing with an HSS pinion shaft and an interior generator-side circumferential recess in which the web projects, and a bearing configured as a journal bearing and arranged between an inner circumference of the ring gear and the web, said rotor-side hub being configured to engage with a coupling connecting the HSS spur gear with an intermediate-stage (IMS) sun gear shaft arranged upstream of the high-speed spur gear stage.

### Claim 7 (depends on 6)

The wind turbine transmission of claim 6, wherein the HSS pinion shaft forms an output shaft of the wind turbine transmission.

### Claim 8 (depends on 6)

The wind turbine transmission of claim 6, wherein the HSS spur gear is mounted on one side of the transmission housing.

### Claim 9 (depends on 6)

The wind turbine transmission of claim 6, wherein the HSS spur gear is mounted in the transmission housing on a rotor side or on a generator side.

### Claim 10 (depends on 6)

The wind turbine transmission of claim 6, wherein the HSS spur gear is forged, welded or screwed from a plurality of elements or produced from a solid body by means of a cutting method.