孙玉,贾盼盼,张雪辉,李文树,左敦桂

• 1:生态环境部核与辐射安全中心
• 2:辽宁红沿河核电有限公司
• 3:苏州热工研究院有限公司

摘要(Abstract)：

某核电站大修期间，发现循环水系统二次滤网的伞形齿轮箱发生断裂，利用宏观检查、化学成分分析、金相检验、电子万能力学试验机、布氏硬度计及扫描电镜等对伞形齿轮箱的断裂原因进行分析。结果表明：伞形齿轮箱的失效部件为输出轴和行星轮架，失效类型为疲劳断裂，输出轴的淬火裂纹导致了其服役过程中的过早失效；而行星轮架的不均匀淬火层，导致输出轴轮齿与行星轮架齿轮啮合时出现受力不均衡，进而引发行星轮架发生疲劳开裂。

关键词(KeyWords)： 伞形齿轮箱;疲劳断裂;淬火裂纹;失效分析

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 孙玉,贾盼盼,张雪辉,李文树,左敦桂

DOI: 10.13289/j.issn.1009-6264.2025-sx29

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