齿轮弯曲疲劳强度是齿轮设计的基本准则之一.由于缺乏有效的方法,传统的斜齿轮弯曲疲劳强度分析通常采用当量直齿轮近似计算.本文针对横轴掘进机减速器斜齿轮副的弯曲疲劳寿命研究了一种经典ANSYS与ANSYS Workbench相接合的方法进行精确分析.利用ANSYS的瞬态分析功能精确求取齿根的最大弯曲应力和对应的最恶啮合位置,然后利用ANSYS Workbench的疲劳分析功能对斜齿轮副的疲劳寿命进行精确分析.仿真结果表明,该方法可以精确求取斜齿轮副的弯曲疲劳寿命和安全系数,为横轴掘进机减速器的设计与优化提供可靠保证.%Bending fatigue strength of gear tooth is one of the basic principles for gear design. Because of lack of effective methods, bending fatigue strength of helical gear tooth is usually calculated as an equivalent spur gear in traditional method. In this paper, a new method for calculating the bending fatigue lives of helical gear pair in the lateral axis roadheader reducer was proposed based on classical ANSYS and ANSYS Workbench. Based on the transient dynamics analysis module of ANSYS, the maximum bending stress of gear tooth and the corresponding worst meshing position for helical gear pair are respectively calculated. Then the bending fatigue lives of a pair of helical gears are simulated by the ANSYS Workbench fatigue module. Simulation results show that the bending fatigue lives and corresponding factors of safety for both helical gears can be accurately calculated by the proposed method. It provides a reliable guarantee for designing and optimization of the lateral axis roadheader reducer.
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