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US 9,482,207 B2Granted
Wind turbine and a method of operating a wind turbine
AssigneeVestas Wind Systems A/S
InventorsThomas Korsgaard Nielsen, Poul Spærhage Frøkjær
Life of this patent
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Abstract
The invention provides a wind turbine comprising a rotatable drive train including at least one bearing (3) and a pump (4) for supply of a lubricant to the bearing (3). The wind turbine further comprises a controller for performing closed loop control of the pump (4) to provide an amount of lubricant which varies depending on an actual state of operation.
Claims15
A wind turbine comprising:
- a rotatable drive train including at least one bearing,
- a gearbox, and
- a pump for supply of a lubricant to the bearing and/or the gearbox,
- the wind turbine further comprising a controller for performing control of the pump to provide an amount of lubricant which varies depending on an actual state of operation, wherein the controller performs closed loop control, and
- wherein the gearbox includes a sump, and the amount of lubricant depends on a level in the sump.
2 more elements
A method of operating a wind turbine comprising:
- a rotatable drive train including at least one bearing,
- a gearbox including a sump, and
- a pump for supplying a lubricant to the bearing and/or the gearbox, the method comprising:
- providing a controller,
- recording the supply of the lubricant, and
- performing a control of the pump to provide an amount of lubricant which varies depending on an actual state of operation, the control being a closed loop control, wherein the amount of lubricant depends on a level in the sump.
3 more elements
A wind turbine comprising:
- a rotatable drive train including at least one bearing,
- a first pump for supplying a lubricant to the bearing,
- a second pump for supplying a lubricant to the bearing independent of the first pump, the first pump being adapted to supply a variable amount of lubrication to the bearing and the second pump being adapted to supply a constant amount of lubrication to the bearing;
- and
- a controller for performing control of the first pump to provide an amount of lubricant which varies depending on an actual state of operation, wherein the controller performs closed loop control.
2 more elements
A method of operating a wind turbine comprising:
- a rotatable drive train including at least one bearing,
- a first pump and a second pump independent of the first pump, each pump for supplying a lubricant to the bearing, the method comprising:
- providing a controller operatively coupled to the first and second pumps,
- using the first pump to provide a variable amount of lubricant to the bearing,
- using the second pump to provide a constant amount of lubricant to the bearing,
- recording the supply of the lubricant, and
- performing a control of the first pump to provide an amount of lubricant which varies depending on an actual state of operation, the control being a closed loop control.
4 more elements
Dependencies are inferred from the claim text.