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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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WES | Articles | Volume 3, issue 2
Wind Energ. Sci., 3, 947-960, 2018
https://doi.org/10.5194/wes-3-947-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Wind Energ. Sci., 3, 947-960, 2018
https://doi.org/10.5194/wes-3-947-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research articles 21 Dec 2018

Research articles | 21 Dec 2018

Comparison of planetary bearing load-sharing characteristics in wind turbine gearboxes

Jonathan Keller et al.
Related subject area  
Design methods, reliability and uncertainty modelling
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Revised manuscript accepted for WES
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Revised manuscript accepted for WES
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Cited articles  
Cooley, C. G. and Parker, R.: A review of planetary and epicyclic gear dynamics and vibrations research, Appl. Mech. Rev., 66, 040804, https://doi.org/10.1115/1.4027812, 2014. 
Crowther, A., Ramakrishnan, V., Zaidi, N. A., and Halse, C.: Sources of time-varying contact stress and misalignments in wind turbine planetary sets, Wind Energy, 14, 637–651, https://doi.org/10.1002/we.447, 2011. 
Dabrowski, D. and Natarajan, A.: Identification of loading conditions resulting in roller slippage in gearbox bearings of large wind turbines, Wind Energy, 20, 1365–1387, https://doi.org/10.1002/we.2098, 2017. 
Flamang, P. and Clement, P.: Stresses and load distribution factors in bearings: a tool to compare bearing alternatives, in: Dresdner Maschinenelemente Kolloquium, Dresden, Germany, 23–24 September 2003, 289–301, 2003. 
Gould, B. J. and Burris, D. L.: Effects of wind shear on wind turbine rotor loads and planetary bearing reliability, Wind Energy, 19, 1011–1021, https://doi.org/10.1002/we.1879, 2016. 
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The US Department of Energy's National Renewable Energy Laboratory (NREL) and industry partners successfully demonstrated a new gearbox design using preloaded tapered roller bearings in the planetary section. The new gearbox design demonstrated improved planetary load-sharing characteristics in the presence of rotor pitch and yaw moments, resulting in a predicted gearbox lifetime that is 3.5 times greater than the previous conventional design with cylindrical roller bearings.
The US Department of Energy's National Renewable Energy Laboratory (NREL) and industry partners...
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