This paper introduces research and discusses findings dealing with failure modes of gearboxes in wind turbines. These gearboxes fail in general after five years which is far below the expected design life of twenty years of a wind turbine. The research is taking a more holistic approach towards finding typical behaviour of the main shaft taking the transient nature of the wind into consideration. In this research, a small scale wind turbine test rig has been designed and manufactured with displacement sensors installed to observe the displacement of the main shaft at specific points, namely the main bearing locations of the forward framework of a wind turbine nacelle, where the main shaft is installed. The experimental data measured from the test rig is being analysed with common beam bending, statistical and fatigue theories to draw conclusions for long term loading in service. Aspects of the turbulent nature of the wind driving the wind turbine have been taken into consideration as being part of the aerodynamic loading onto the rotor and eventually the gearbox, transmitted through the main shaft. The purpose of the test rig at this stage is to obtain a quantitative insight into the motion of the main shaft. The deliberately chosen softer aluminum material and the more slender geometry for the components should provide exaggerated displacements which help to make motion and deformations more obvious. At this point, no resemblance to real size wind turbines has been established.
How to Cite
Heller, A., (2010), Science & Technology Review Extracting More Power from the Wind. April/May 2010. https://str.llnl.gov/AprMay10/ tmirocha.hml (accessed October 6, 2010)
Van Rensselar, J. (2010), Tribology & Lubrication Technology. The Elephant. . http://www.stle.org/assets/news/document/Cover_Story _06-10.pdf (accessed October, 2010)
Moser, B., (2010). Turbine Failure: Fine-tuning turbine gearbox performance. http://social.windenergyupdate.com/industry- insight/turbine-failure-fine-tuning-turbine-gearbox- performance (accessed October 7, 2010)
Pope, A., Harper, J. J. (1966). Low-Speed Wind Tunnel Testing. NJ: John Wiley & Sons, Inc.
Rexroth Bosch Group (2010). Innovative Gearboxes for Wind Turbines. http://www.mywindpowersystem.com/marketplace/wp- content/uploads/2010/04/Bosch-Rexroth-2_5mW- Gearbox-Techinical-Information-pdf.pdf (accessed December 12, 2010)
Juvinall, R. C., Marshek, K. M. (2006). Fundamentals of MACHINE COMPONENT DESIGN. John Wiley & Sons, Inc.
Eck, B. (1973). Fans. Oxford, Pergamon Press Ltd.
The Prognostic and Health Management Society advocates open-access to scientific data and uses a Creative Commons license for publishing and distributing any papers. A Creative Commons license does not relinquish the author’s copyright; rather it allows them to share some of their rights with any member of the public under certain conditions whilst enjoying full legal protection. By submitting an article to the International Conference of the Prognostics and Health Management Society, the authors agree to be bound by the associated terms and conditions including the following:
As the author, you retain the copyright to your Work. By submitting your Work, you are granting anybody the right to copy, distribute and transmit your Work and to adapt your Work with proper attribution under the terms of the Creative Commons Attribution 3.0 United States license. You assign rights to the Prognostics and Health Management Society to publish and disseminate your Work through electronic and print media if it is accepted for publication. A license note citing the Creative Commons Attribution 3.0 United States License as shown below needs to be placed in the footnote on the first page of the article.
First Author et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 United States License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.