离心叶轮开裂的机理研究  

Stress Analysis of a Cracked Centrifugal Impeller

作　　者：徐自力[1] 邱凯[1] 王尚锦[1] 方其先[1] 

机构地区：[1]西安交通大学

出　　处：《西安交通大学学报》1998年第10期14-17,共4页Journal of Xi'an Jiaotong University

摘　　要：从力学角度分析了某叶轮开裂的驱动力，并对断口进行了宏观和微观分析，找到了叶轮开裂的原因．在分析中提出了新的叶轮应力计算模型，并建议用敏感性分析的手段来对叶轮进行设计，从而达到有效控制弯应力水平的目的．提出的不调频叶轮概念，有利于避免气流激振造成的叶轮疲劳破坏．Stress analysis is made to study the cause of cracking in a centrifugal impeller. Bending stress is found to be an important design factor. A method of sensitivity analysis to design impeller that can control bending stress effectively is proposed. The concept of a no frequency modulation impeller is presented. The approach could be needed to reduce the chance of vibration induced impeller failure by unsteady gas flow.

关 键 词：离心叶轮 应力 疲劳 敏感性 开裂 

分 类 号：TH452[机械工程—机械制造及自动化]