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Study on Bearing Life Calculation for Wind Turbine Gearbox
Long-jun Liang(양용군),Chang Choi(최창),Qi Zhang(장기),Zhe-Zhu Xu(허철수),Sung-ki Lyu(류성기) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.5
Currently, wind power has become a major research field in the area of sustainable development. As one important component of a wind turbine transmission system, most instances of downtime due to a gearbox failure are caused by bearing failures. Gearboxes for wind turbines must have the highest levels of reliability over a period of approximately 20 years, withstanding high dynamic loads. At the same time, a lightweight design and cost minimization efforts are required. These demands can only be met with a well-thought-out design, high-quality materials, a high production quality and proper maintenance. In order to design a reliable and lightweight gearbox, it is necessary to analyze methods pertaining to the bearing rating lifetimes of the standard and of different companies, also including calculation methods for modification factors. This can determine the influence of the bearing lifetime.
5MW 풍력용 Pitch Drive 구성품의 부하에 관한 연구
김동영(Dong-Young Kim),이인범(In-Bum Lee),양용군(Long-jun Liang),류성기(Sung-Ki Lyu) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.1
Wind power is a type of clean energy source which does not produce carbon dioxide. The wind turbine industry is considered as a major growth industry in many countries. The main cause of wind turbine failure arises in the wind turbine gearbox, and the main type of damage occurs in the bearings and gears. Therefore, predictions ofgear and bearing damage are very important to ensurethe reliability of the wind turbine reducers used in these systems. In this research, in order to optimize the wind turbine reducer, a series of simulations and redesigns was done using the tool RomaxDesigner. The RomaxDesigner model was used to analyze the bearing life of the duty cycle for a 5 MW wind-turbine pitch drive and to calculate the load in operating states. The reducer was designed to satisfy the life requirement by analyzingbearing damage and calculating the stress values of the main parts of the reducer.