Abstract
Contact fatigue issues become more and more crucial in gear industry as they significantly affect the reliability and service life of associated mechanical systems such as wind turbine gearboxes. The contact fatigue behavior is mostly determined by the mechanical properties of materials and stress fields near the contact area, which is further influenced by the lubrication and surface roughness due to pressure fluctuations. In this study, a numerical model incorporating the lubrication state, tooth surface roughness, residual stress, and mechanical properties of the material is developed to determine the contact fatigue behavior of a megawatt level wind turbine carburized gear. The variations of the hardness and residual stress along the depth were characterized by the Vickers hardness measurement and X-ray diffraction test, respectively. The elastohydrodynamic lubrication theory was applied to predict the contact pressure distribution, highlighting the influence of the surface roughness that stemed from the original measurement through an optical profiler. The stress histories of the studied material points during a complete contact loading cycle were fast calculated using the discreteconcrete fast Fourier transformation (DC-FFT) method. Modified Dang Van diagrams under different working conditions were determined to estimate the contact fatigue failure risk. The effect of the root mean square (RMS) value of the surface roughness on the failure risk at critical material points were discussed in detail. Results revealed that the surface roughness significantly increases the contact fatigue failure risk within a shallow area, and the maximum risk appears near the surface.
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17 May 2019
The article “Study on contact fatigue of a wind turbine gear pair considering surface roughness”, written by Heli LIU, Huaiju LIU, Caichao ZHU, Zhangdong SUN, Houyi BAI, was erroneously originally published online without open access. After online first publication this was corrected and the article is now an open access publication. The article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The original article has been corrected.
17 May 2019
The article “Study on contact fatigue of a wind turbine gear pair considering surface roughness”, written by Heli LIU, Huaiju LIU, Caichao ZHU, Zhangdong SUN, Houyi BAI, was erroneously originally published online without open access. After online first publication this was corrected and the article is now an open access publication. The article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The original article has been corrected.
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Acknowledgements
The work was supported by the National Natural Science Foundation of China (Nos. U1864210, 51775060, and 51705043) and Chongqing Research Program on Technology Innovation and Application Demonstration (No. cstc2018jszx-cyzdX0053).
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Heli LIU. He has been studying as a master student in State Key Laboratory Mechanical Transmissions (SKLMT), Chongqing University, China, since 2016. His research interest includes gear contact fatigue failure mechanisms based upon the surface integrity properties.
Huaiju LIU. He is currently working as an associate professor in State Key Laboratory of Mechanical Transmissions (SKLMT), Chongqing University, China. He obtained the Ph.D. degree from the University of Warwick, UK, in 2013. His research fields include tribology and fatigue behaviors of mechanical elements.
Caichao ZHU. He is a professor in State Key Laboratory of Mechanical Transmissions (SKLMT), Chongqing University, China. He received the Ph.D. degree from Chongqing University, China, in 1998. His research is mainly related to the dynamic analysis of transmission systems, including the estimation and control of the vibration and noise.
Houyi BAI. He is currently working as a senior engineer in Chongqing Wangjiang Industrial Co., Ltd., China. He is now a Ph.D. student in State Key Laboratory Mechanical Transmissions (SKLMT), Chongqing University, China. His research is mainly about the innovative gearbox design.
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Liu, H., Liu, H., Zhu, C. et al. Study on contact fatigue of a wind turbine gear pair considering surface roughness. Friction 8, 553–567 (2020). https://doi.org/10.1007/s40544-019-0277-3
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DOI: https://doi.org/10.1007/s40544-019-0277-3