Yoo Ho-Gil, Chung Woo-Jin, Kim Beom-Soo, Park Young-Jun, Kim Su-Chul, Lee Geun-Ho
Department of Biosystems Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
Convergence Major in Global Smart Farm, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
Sci Rep. 2022 Feb 2;12(1):1713. doi: 10.1038/s41598-022-05828-1.
Wind turbines are eco-friendly energy sources that generate electricity from wind power. Among their various components, gearboxes constitute the most critical loss owing to their longest downtime. To guarantee their durability, a flexible pin was designed based on the original straddle-mounted pin for enhanced tooth load sharing and distribution in the planetary gear set (PGS) of a wind turbine gearbox (WTGB). The improved durability was evaluated by calculating the mesh load factor and face load factor for contact stress and comparing these values with those of the original straddle-mounted pin. The mesh load factor decreased from 1.37 to 1.08, whereas the maximum face load factor decreased slightly, moderating the overall safety factor variation. Furthermore, the structure of the proposed flexible pin model was analyzed and verified that no static failure or interference occurred. Additionally, microgeometry optimization was applied to improve the load distribution. Therefore, it was verified that a flexible pin applied to a single helical-geared PGS, thus far considered impossible, enhances the durability of WTGBs by improving the load sharing and distribution of a PGS. Consequently, the possibility of designing single helical-geared planetary gearboxes with flexible pins to take advantages of both helical gears and flexible pins was shown analytically.
风力涡轮机是利用风能发电的环保能源。在其各种部件中，齿轮箱由于停机时间最长而构成了最关键的损耗部分。为确保其耐用性，在风力涡轮机齿轮箱（WTGB）行星齿轮组（PGS）中，基于原始的跨装式销设计了一种柔性销，以增强齿间载荷分担和分布。通过计算接触应力的啮合载荷系数和齿面载荷系数，并将这些值与原始跨装式销的值进行比较，评估了改进后的耐用性。啮合载荷系数从1.37降至1.08，而最大齿面载荷系数略有下降，缓和了整体安全系数的变化。此外，对所提出的柔性销模型的结构进行了分析，验证没有发生静态失效或干涉。另外，应用微观几何优化来改善载荷分布。因此，验证了应用于单斜齿轮PGS的柔性销（此前认为不可能）通过改善PGS的载荷分担和分布，提高了WTGB的耐用性。因此，分析表明了设计带有柔性销的单斜齿轮行星齿轮箱以利用斜齿轮和柔性销两者优势的可能性。
