Abstract Conventional tractor transmission spiral bevel gears are designed and evaluated based on the engine rated load, which is significantly higher than the load conditions in the field. In this study, the fatigue life of a spiral bevel gear is evaluated to obtain data for design optimization. The equivalent load was calculated using the field load data, and the integrated equivalent load was calculated based on the annual usage of major field operations in Korea. The fatigue life of three spiral bevel gear samples was evaluated using the accelerated life test (ALT) under an engine rated load condition of 120%. It was also evaluated under engine rated, plow equivalent, and integrated equivalent load. Fatigue life was estimated using the ALT results and the fatigue damage exponent based on the ALT equation. We observed that the fatigue life of the spiral bevel gear under the plow equivalent and integrated equivalent loads is higher than that under the rated load by 214 and 9,400 times, respectively. The results of this study can provide useful information for the design optimization of tractor transmission spiral bevel gears considering the field equivalent load.

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拖拉机传动螺旋锥齿轮疲劳寿命评价

摘要 传统拖拉机传动螺旋锥齿轮是根据发动机额定负载设计和评估的，该负载显着高于现场负载条件。在这项研究中，对螺旋锥齿轮的疲劳寿命进行了评估，以获得用于设计优化的数据。等效负荷是根据现场负荷数据计算的，综合等效负荷是根据韩国主要现场作业的年使用量计算的。在发动机额定负载为 120% 的条件下，使用加速寿命试验 (ALT) 评估三个螺旋锥齿轮样品的疲劳寿命。它还在发动机额定载荷、犁当量和综合等效载荷下进行了评估。使用 ALT 结果和基于 ALT 方程的疲劳损伤指数估计疲劳寿命。我们观察到螺旋锥齿轮在犁当量和综合等效载荷下的疲劳寿命分别比额定载荷下高214倍和9400倍。该研究结果可为考虑现场等效载荷的拖拉机传动螺旋锥齿轮的设计优化提供有用的信息。