Friction torque of wind-turbine pitch bearings – comparison of experimental results with available models

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Stammler, Matthias; Schwack, Fabian; Bader, Norbert; Reuter, Andreas; Poll, Gerhard: Friction torque of wind-turbine pitch bearings – comparison of experimental results with available models. In: Wind Energy Science 3 (2018), S. 97-105. DOI:

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Sum total of downloads: 397

Pitch bearings of wind turbines are large, grease-lubricated rolling bearings that connect the rotor blades with the rotor hub. They are used to turn the rotor blades to control the power output and/or structural loads of the turbine. Common actuators turning the blades are hydraulic cylinders or electrical motor / gearbox combinations. In order to design pitch actuator systems that are able to turn the blades reliably without imposing an excessive power demand, it is necessary to predict the friction torque of pitch bearings for different operating conditions. In this paper, the results of torque measurements under load are presented and compared to results obtained using different calculation models. The results of this comparison indicate the various sources of friction that should be taken into account for a reliable calculation model.
License of this version: CC BY 3.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2017
Appears in Collections:Fakultät für Maschinenbau

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pos. country downloads
total perc.
1 image of flag of Germany Germany 253 63.73%
2 image of flag of China China 48 12.09%
3 image of flag of United States United States 19 4.79%
4 image of flag of United Kingdom United Kingdom 13 3.27%
5 image of flag of India India 10 2.52%
6 image of flag of Latvia Latvia 6 1.51%
7 image of flag of No geo information available No geo information available 5 1.26%
8 image of flag of Spain Spain 4 1.01%
9 image of flag of Canada Canada 4 1.01%
10 image of flag of Austria Austria 4 1.01%
    other countries 31 7.81%

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