초록 ▼

A wind energy system is provided with said wind energy system including a hub pivotable about a rotation axis, a first bearing connected to said hub, a tapered adapter, a second bearing connected to said first bearing by said adapter, wherein said first and second bearings and said adapter are arran

A wind energy system is provided with said wind energy system including a hub pivotable about a rotation axis, a first bearing connected to said hub, a tapered adapter, a second bearing connected to said first bearing by said adapter, wherein said first and second bearings and said adapter are arranged such that the tilt angle of said rotation axis of said hub is adjustable. Further, a tilt adjustment system for a wind energy system and a method for operating a wind energy system is provided.

대표청구항 ▼

1. A wind energy system comprising: a rotatable hub defining a rotation axis;a first bearing supporting said hub;an adapter comprising two surfaces which are generally opposite to each other, the two surfaces being inclined relative to each other so that the adapter is tapered; anda second bearing;w

1. A wind energy system comprising: a rotatable hub defining a rotation axis;a first bearing supporting said hub;an adapter comprising two surfaces which are generally opposite to each other, the two surfaces being inclined relative to each other so that the adapter is tapered; anda second bearing;wherein the two surfaces of the adapter are connected to said first bearing and said second bearing respectively in order to render a tilt angle of said rotation axis to be adjustable. 2. The wind energy system according to claim 1, wherein said first bearing is a lower yaw bearing mounted on a tower of said wind energy system. 3. The wind energy system according to claim 2, wherein said adapter is arranged on top of said lower yaw bearing. 4. The wind energy system according to claim 3, wherein said second bearing is an upper yaw bearing arranged on top of said adapter. 5. The wind energy system according to claim 1, wherein said first bearing is rotatable about a substantially horizontal axis and wherein said adapter is mounted on said first bearing. 6. The wind energy system according to claim 5, further comprising a shaft connected to said hub, said shaft being rotatable about said rotation axis so that said shaft is supported by said second bearing. 7. The wind energy system according to claim 6, further comprising a gearbox connected to said shaft and being supported by said adapter. 8. The wind energy system according to claim 6, further comprising: a gooseneck, wherein said first bearing being mounted to said gooseneck; anda gearbox connected to said shaft at one end and to said gooseneck at a second end. 9. The wind energy system according to claim 8, wherein said gearbox is connected to said gooseneck by means of torque arms. 10. The wind energy system according to claim 9, wherein said torque arms are balancing cylinders. 11. The wind energy system according to claim 6, further comprising: a gearbox input shaft; anda flexible joint configured to transmit torque between said shaft and said gearbox input shaft. 12. The wind energy system according to claim 1, further comprising a bearing drive to actuate at least one of said first bearing and said second bearing. 13. The wind energy system according to claim 12, further comprising a controller connected to said bearing drive and being programmed to adjust said tilt angle by controlling said bearing drive. 14. The wind energy system according to claim 13, further comprising an air speed indicator connected to said controller, wherein an air speed value is transmitted from said air speed indicator to said controller and said controller is programmed to adjust the tilt angle depending on said air speed value. 15. A wind energy system comprising: a nacelle;an upper yaw bearing connected to said nacelle;a first adapter comprising two surfaces which are generally opposite to each other, the two surfaces being inclined relative to each other so that the first adapter is tapered, one of the two surfaces being connected to said upper yaw bearing; anda lower bearing connected to the other of the two surfaces of said first adapter to support the first adapter. 16. The wind energy system according to claim 15, further comprising: an air speed indicator;a wind direction indicator; anda controller connected to said air speed indicator and said wind direction indicator for receiving an air speed value and a wind direction value, said controller being arranged to actuate said lower yaw bearing and said upper yaw bearing to position said nacelle depending on said air speed value and said wind direction value. 17. The wind energy system according to claim 15, further comprising a middle yaw bearing and a second tapered adapter, said middle yaw bearing and said second tapered adapter being arranged between said first tapered adapter and said upper yaw bearing such that said bearings and said tapered adapters are arranged in an alternating order to support said nacelle. 18. A method for operating a wind energy system, the wind energy system comprising a rotatable hub defining a rotation axis, a first bearing supporting said hub, a second bearing, and a adapter comprising two surfaces which are generally opposite to each other and connected to the first bearing and the second bearing, respectively, the two surfaces being inclined relative to each other so that the adapter is tapered, said method comprising: determining a set tilt angle for said rotation axis; androtating at least one of said first bearing and said second bearing in order to adjust a tilt angle of said hub to said set tilt angle. 19. The method of claim 18, further comprising: determining a wind speed value; andcalculating said set tilt angle for said rotation axis depending on said wind speed value. 20. The method of claim 18, further comprising: determining a wind tilt angle value; andcalculating said set tilt angle for said rotation axis depending on said wind tilt angle value.