Patent ID: 11946450
Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A wind turbine, comprising:
a hub;
rotor blades, wherein each rotor blade is rotatably supported at or in the hub by a pitch bearing;
a pitch control device for changing a pitch angle of the rotor blades; and
a measurement system comprising a controller and a plurality of sensors coupled to the controller, the plurality of sensors configured to capture sensor signals in or at the pitch bearing and for changing the pitch angle by the pitch control device as a function of the sensor signals to prevent failures of the pitch bearing due to a lack of lubrication, wherein the sensor signals represents a change in vibration from the pitch bearing that is caused by the lack of lubrication between contact surfaces of the pitch bearing, during operation of the wind turbine;
wherein the measurement system compares the sensor signals to an initial pattern of the sensor signals captured under normal operating conditions, and when a final pattern of the sensor signals deviates from the initial pattern, the pitch control device is controlled to change the pitch angle, the final pattern comprising a continuous progress of the sensor signals over a predetermined time;
wherein the plurality of sensors include at least one sensor arranged in or at the hub and at least one sensor arranged in or at the rotor blades.