Shanmugasundaram Sankar, Kumaresan Manivarma, Muthusamy Nataraj
Department of Mechanical Engineering, Nehru College of Engineering and Research Centre, Thrissur, India.
Department of Mechanical Engineering, Sri Krishna College of Engineering and Technology, Coimbatore, India.
Springerplus. 2014 Dec 16;3:746. doi: 10.1186/2193-1801-3-746. eCollection 2014.
This paper examines failure of helical gear in speed increasing gearbox used in the wind turbine generator (WTG). In addition, an attempt has been made to get suitable gear micro-geometry such as pressure angle and tip relief to minimize the gear failure in the wind turbines. As the gear trains in the wind turbine gearbox is prearranged with higher speed ratio and the gearboxes experience shock load due to atmospheric turbulence, gust wind speed, non-synchronization of pitching, frequent grid drops and failure of braking, the gear failure occurs either in the intermediate or high speed stage pinion. KISS soft gear calculation software was used to determine the gear specifications and analysis is carried out in ANSYS software version.11.0 for the existing and the proposed gear to evaluate the performance of bending stress tooth deflection and stiffness. The main objective of this research study is to propose suitable gear micro-geometry that is tip relief and pressure angle blend for increasing tooth strength of the helical gear used in the wind turbine for trouble free operation.
本文研究了风力发电机组增速齿轮箱中斜齿轮的失效情况。此外，还尝试获取合适的齿轮微观几何形状，如压力角和齿顶修缘，以尽量减少风力涡轮机中的齿轮失效。由于风力涡轮机齿轮箱中的齿轮系预先设置了较高的速比，且齿轮箱会因大气湍流、阵风风速、变桨不同步、频繁电网掉电和制动故障而承受冲击载荷，齿轮失效要么发生在中速或高速级小齿轮上。使用KISS软齿轮计算软件确定齿轮规格，并在ANSYS软件版本11.0中对现有齿轮和改进后的齿轮进行分析，以评估弯曲应力、齿形挠度和刚度性能。本研究的主要目的是提出合适的齿轮微观几何形状，即齿顶修缘和压力角组合，以提高风力涡轮机中斜齿轮的齿强度，实现无故障运行。
