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涡轮增压器叶轮轴心孔断裂故障分析及改善

发布时间:2021-11-19 17:01:21   阅读次数:  字体:    

 Failure Analysis and Improvement of the Fracture of the Inner Hole of the Turbocharger Impeller

李伟12 LI Wei 李国祥 1LI Guo-xiang 张健健2 ZHANG Jian-jian 
李建平2 LI Jian-ping 王宁宁2 WANG Ning-ning 张晓林23ZHANG Xiao-lin
(1山东大学能源与动力工程学院,济南 250061;2康跃科技(山东)有限公司,潍坊 262718;
3机械工业内燃机增压系统重点实验室,潍坊 262718)
(1School of Energy and Power Engineering,Shandong University,Ji'nan 250061,China;
2Kangyue Technology(Shandong)Co.,Ltd.,Weifang 262718,China;
3Key Laboratory of Turbocharging System of Machinery Industry,Weifang 262718,China)
摘要:针对可靠性试验过程中出现的叶轮从轴心孔位置断裂的故障,进行了故障分析及复现试验。通过仿真分析确认叶轮轴心孔最大离心应力在 133000r/min 时为 413.5MPa,明显超出叶轮材料 C354-T61-HIP 的 330MPa 的抗拉强度,是导致叶轮断裂的根本原因。优化方案调整了轮背加工形式,叶轮轴心孔最大离心应力为 350.5MPa,比原叶轮的 413.5MPa 减小 15.2%,成功完成 200 小时可靠性试验。基于仿真分析及可靠性试验验证,建议在实际使用工况下的叶轮轴心孔最大离心应力臆350MPa。
Abstract: Aiming at the failure of the impeller to break from the position of the inner hole during the reliability test, the failure analysis and recurrence test were carried out. Through simulation analysis, it is confirmed that the maximum centrifugal stress of the impeller inner hole is 413.5MPa at 133000r/min, which obviously exceeds the 330MPa tensile strength of the impeller material C354-T61-HIP, which is the root cause of impeller fracture. The optimization plan adjusted the impeller back processing form, the maximum centrifugal stress of the impeller inner hole is 350.5MPa, which is15.2% less than the original impeller's 413.5MPa, and the 200-hour reliability test was successfully completed. Based on simulation analysis and reliability test,it is suggested that the maximum centrifugal stress of impeller inner hole should be less than 350MPa under actual operating conditions.
关键词:涡轮增压器;叶轮断裂;轴心孔;叶轮轮背;离心应力
Key words: turbocharger;impeller fracture;inner hole;impeller back;centrifugal stress
中图分类号:U463.1 文献标识码:A 文章编号:1674-957X(2021)22-0042-03
文章出处:李伟,李国祥,张健健,李建平,王宁宁,张晓林.涡轮增压器叶轮轴心孔断裂故障分析及改善[J].内燃机与配件,2021(22):42-44.

 
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