离心风机叶轮强度优化设计与寿命预测  

Strength Optimization Design and Life Prediction of Centrifugal Fan Impeller

作　　者：韩泳涛 蔺超云 曹晨阳 金守清 Yong-tao Han;Chao-yun Lin;Chen-yang Cao;Shou-qing Jin(Research Institute of Infinair Corporation)

机构地区：[1]英飞同仁风机股份有限公司研究院

出　　处：《风机技术》2022年第S01期28-33,共6页Chinese Journal of Turbomachinery

摘　　要：为了研究某离心风机叶轮叶片断裂现象,基于Workbench运用子模型法对叶轮进行强度分析,根据分析结果对叶轮进行优化设计,最后运用nCode Designlife对改进后叶轮进行疲劳寿命预测。研究结果表明:原叶轮在离心力作用下的等效应力远超出材料许用应力,应力集中位置与实际破坏位置基本一致,因此,将子模型法用于叶轮强度分析是可行的,而且分析结果更为精确有效,分析效率显著提高。改进后叶轮的等效应力小于材料许用应力,其中最大应力仅为122.5MPa,有效保证叶轮运行可靠性,通过疲劳寿命预测证明该叶轮使用寿命可达35年。In order to study the fracture phenomenon of the impeller blade of a centrifugal fan,the sub model method is used to analyze the strength of the impeller based on the Workbench software,and the impeller is optimized according to the analysis results.Finally,the nCode DesignLife is used to predict the fatigue life of the improved impeller.The results show that the equivalent stress of the original impeller under the centrifugal force far exceeds the allowable stress of the material,and the stress concentration position is basically consistent with the actual failure position.Therefore,it is feasible to apply the sub model method to the strength analysis of the impeller,and the analysis results are more accurate and effective,and the analysis efficiency is significantly improved.The equivalent stress of the improved impeller is less than the allowable stress of the material,and the maximum stress is only 122.5MPa,which effectively ensures the operation reliability of the impeller.The fatigue life prediction shows that the service life of the impeller can reach 35 years.

关 键 词：叶轮 有限元 强度分析 疲劳寿命 

分 类 号：TH432[机械工程—机械制造及自动化]