秦国磊,陈地发,吴吉展,李扬,刘怀举

• 1:重庆大学高端装备机械传动全国重点实验室

摘要(Abstract)：

99%可靠度下齿轮疲劳极限是齿轮传动设计的必要参数，通常可通过满足一定样本数量的疲劳试验如升降法获得。针对高可靠度疲劳极限所需试验样本量大、试验周期长的问题，基于近5年升降法试验所测得的55组不同模数的18CrNiMo7-6、20Cr2Ni4A、9310、20CrMnTi、20CrMnMo和42CrMo齿轮在渗碳、喷丸强化、离子注入、调质渗氮等工艺状态下的弯曲疲劳极限试验结果，统计分析不同可靠度下齿轮的弯曲疲劳极限，进而得到齿轮50%～99%可靠度之间的疲劳极限转换系数。结果表明：不同材料、工艺和模数的齿轮疲劳极限转换系数f_(xF)范围为0.840～0.968,均值为0.924;喷丸强化工艺使得渗碳齿轮转换系数均值提升1.64%,调质齿轮提升2.34%;将本文所得转换系数用于99%可靠度下齿轮弯曲疲劳极限的预测，与升降法结果相比，平均误差在3.00%以内；进一步应用文献数据用于99%可靠度齿轮接触疲劳极限的预测，预测误差在3.40%以内；所提出的方法相比升降法，试验样本量和试验周期减少50%,为齿轮抗疲劳和高功率密度设计提供了高效方法支撑。

关键词(KeyWords)： 齿轮;疲劳极限;转换系数;表面强化;试验方法

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52322504)

作者(Author): 秦国磊,陈地发,吴吉展,李扬,刘怀举

DOI: 10.13289/j.issn.1009-6264.2024-0583

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