A support frame (44) and method are described herein for support of a wind turbine blade (22) on a vehicle during transport to an installation site. A load indicator (46) is provided adjacent one or more support pads (52) when using the support frame (44), with the load indicator (46) being configured to determine and communicate an amount of movement of the wind turbine blade (22) relative to the support frame (44) during initial loading into the support frame (44) and during transport. To this end, the load indicator (46) helps assure that the wind turbine blade (22) is properly loaded into the support frame (44) in a desired transport position, while also confirming whether significant shocks or other movements have occurred during transport that could lead to a higher likelihood of internal or external damage at the blade (22).

A method for the calculation of a wind turbine blade deflection is described. The method utilises a known blade modal profile in the calculation of the blade deflection, such that the a priori knowledge of the blade excitation modes can be used with a simple distance measurement to determine the blade deflection shape. The calculated blade deflection can then be used as an input to control wind turbine operation, e.g. where it is likely that the deflected blade might result in a tower strike.

A displacement sensor detects a displacement of a main shaft, thereby detecting a relative displacement between an inner race and an outer race of a bearing. A data processor carries out an abnormality diagnosis for the bearing based on a detected value of the displacement sensor. The data processor carries out an abnormality diagnosis based on a difference between the detected value of the displacement sensor under a first axial load condition for the bearing and the detected value of the displacement sensor under a second axial load condition different from the first axial load condition. Thereby, an abnormality diagnosing apparatus for a rolling bearing is provided, by which a highly accurate abnoiiiiality diagnosis can be implemented even if installation states of a displacement sensor and an object to be measured are changed due to maintenance or repair.

An exemplary system for determining an operating condition for a wind turbine having a rotor, generator, and gearbox, includes a plurality of sensors mounted within the nacelle of the wind turbine. The system also includes a pair proximity sensors are mounted adjacent to the rotor for measuring rotor displacement. A first processor is connected to receive sensor data from the pair of proximity sensors and is configured to partition the received sensor data into predefined datasets, and a second processor configured to format the predefined datasets for transmission over a network to a processing computer.

The present disclosure relates to methods and systems for measuring deflection of blades of a wind turbine. Examples include a light emitting and collection device mounted to the nacelle and configured to emit light in a direction within a substantially vertical plane. Examples include a method for operating a wind turbine including emitting light above a hub, receiving the light when reflected by a blade of the wind turbine, and, if the level of blade deflection is above a threshold, reducing blade loading of the blade before the blade reaches a vertically downward position. Examples include a method for monitoring deflection of a rotor blade of a wind turbine comprising emitting a light sheet, collecting reflections of the emitted light, and determining deflection of the rotor blade by determining a time during which the blade reflects the emitted light sheet.

The invention relates to a method for determining the wear of a sliding bearing (19) arranged in a wind turbine gearbox (7), in particular a planetary gearbox, which sliding bearing (19) serves for mounting a gearbox component (23). A radial displacement of the position of the gearbox component (23) pivoted by means of the sliding bearing (19) is detected by means of a distance sensor (25) arranged in the wind turbine gearbox (7).

A method for detecting a failure condition in one or more components of a wind turbine is provided. The method includes actuating, via a controller, an impact device to generate a vibration having a vibration frequency and a vibration magnitude in the one or more components. The method further includes receiving data indicative of the vibration frequency and the vibration magnitude from a sensor communicatively coupled to the controller. The method further includes determining, via the controller, whether the data indicative of the vibration frequency and/or the vibration magnitude is outside of a predetermined vibration range for the one or more components.

The invention relates to the use of laser beams for measuring rotors, in particular wind turbines, for determining an imbalance or defining the absolute setting angle and/or measuring a half-profile of a rotor blade, and a method for determining a torsion of the rotor blade as a deviation between two pitch angles. The invention enables the determining of the absolute pitch angle of a rotor blade during operation, without it being necessary to obtain information relating to the rotor blade or reference points with a known position relative to the pitch axis, in particular using measuring devices that are mobile and/or positioned on the ground. It is also possible to contactlessly detect imbalances.

A main shaft assembly of a wind turbine and method for manufacturing the same are provided. Accordingly, the main shaft assembly includes a structural/shaft body defining a cavity therein. The shaft body is configured to transmit a load of the wind turbine developed in response to the wind. An inner body is located within the cavity. The inner body is non-loadbearing with respect to the load. At least one sensor is coupled to the inner body and positioned within the cavity for detecting a deflection of the shaft body in response to the load.

Provided is a rotor locking system for a rotor hub of a wind driven power plant, including a rotor locking disk, a rotor locking pin unit, and a rotor locking pin, wherein the rotor locking disk is mounted to the rotor hub, wherein the rotor locking pin is an actuated element of the rotor locking pin unit, wherein the rotor locking pin is configured to assume a first position The rotor locking pin is configured to assume a second position in which the rotor locking pin extends into a recess of the rotor locking disk such that a rotation of the rotor hub is preventable, and wherein the rotor locking pin is lockable.