大型离心压缩机叶轮叶片疲劳可靠性分析  

Fatigue Reliability Analysis of Blades of Large Centrifugal Compressor

作　　者：吴承伟[1] 关振群[1] 郭杏林[1] 程耿东[1] 王学军[2] 戴继双[2] 张勇[2] 杨树华[2] 

机构地区：[1]大连理工大学运载工程与力学学部工业装备结构分析国家重点实验室,辽宁大连116024 [2]沈阳鼓风机集团公司,辽宁沈阳110142

出　　处：《装备制造技术》2008年第8期1-3,共3页Equipment Manufacturing Technology

摘　　要：研究了国产某型号离心压缩机叶轮叶片的疲劳寿命可靠性设计,探讨了其疲劳破坏寿命的预报方法,发现决定叶片疲劳寿命的工作应力有两个:稳态应力水平和交变应力水平。任何一个应力水平过高,都会导致疲劳寿命降低;降低稳态应力水平可以通过结构优化设计来实现,降低交变应力水平主要靠运行管理来控制。This paper studies the reliability design method and the fatigue life prediction of blades of large blower. It is found that the fatigue fife of the blades is determined by both of the mean stress and the stress range. A high value of either the mean stress or the stress range will lead to a low fatigue fife. The mean stress can be controlled by structural optimization design, but the stress range is mainly controlled by the operation.

关 键 词：离心压缩机 叶轮叶片 疲劳寿命 稳态应力 交变应力 控制 

分 类 号：TH45[机械工程—机械制造及自动化]