弧齿锥齿轮弯曲疲劳寿命仿真与加速试验评价

doi:10.12382/bgxb.2021.0601

摘要/Abstract

摘要： 疲劳寿命试验是齿轮强度评价必不可少的手段，但长期以来弧齿锥齿轮疲劳试验数据缺乏，导致相关产品设计存在较大的不确定性。本文建立了弧齿锥齿轮三维有限元模型，给出了相应的弯曲疲劳寿命仿真计算流程；探讨了加速疲劳试验的机理与方法，确定了加速疲劳试验应力因子。对20CrNiMo材料试棒进行了拉伸疲劳强度试验，获得了材料的S-N曲线，以此为基础数据，利用三维有限元软件完成了两个水平的弯曲疲劳寿命仿真计算；在专用闭功率流耐久性试验台上进行了若干组齿轮的弯曲强度疲劳寿命试验，疲劳寿命与理论仿真结果对比误差小于3.2%，一致性较好。证明了以疲劳寿命仿真与加速试验手段评价复杂结构件锥齿轮弯曲疲劳强度的可行性。

关键词: 弧齿锥齿轮, 有限元, S-N曲线, 疲劳强度, 加速因子

Abstract: Fatigue life testing is an indispensable method for evaluating the gear strength of spiral bevel gears, but the lack of fatigue test data has long led to high uncertainties in the design of related products. This study establishes a three-dimensional finite element model for a spiral bevel gear and presents a simulation calculation of the corresponding bending fatigue life. The mechanism and methods of the accelerated fatigue test are discussed, and the stress factors for the accelerated test are presented. The tensile fatigue strength test is carried out on the 20CrNiMo material test bar, and the S-N curve of the material is obtained. Based on this, a three-dimensional finite element software is used to complete multiple calculations of simulated digital bending fatigue life in a special closed power flow bevel gear. The durability test bench has been used to conduct several sets of tests on gear bending strength and fatigue life. Test results and theoretical simulation results are in good agreement, with a comparison error of less than 3.2%. Through fatigue life simulation and accelerated testing, the feasibility of the evaluation method is proved. The approach works well in evaluating the bending fatigue strength of bevel gears with complex structures.

Key words: spiralbevelgear, finiteelement, S-Ncurve, fatiguestrength, acceleratedfactor

中图分类号:

TG113.2

魏冰阳，郭玉梁，古德万，王永强. 弧齿锥齿轮弯曲疲劳寿命仿真与加速试验评价[J]. 兵工学报, 2022, 43(11): 2945-2952.

WEI Bingyang， GUO Yuliang， GU Dewan， WANG Yongqiang. Evaluation of Bending Fatigue Life of Spiral Bevel Gears by Simulation and Accelerated Test[J]. Acta Armamentarii, 2022, 43(11): 2945-2952.

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