离心叶轮高阶振动故障分析与改进  

Failure Analysis and Improvement Design of Centrifugal Impeller High-order Resonance

作　　者：冯凯凯 查小晖 赵勇铭 FENG Kai-kai;ZHA Xiao-hui;ZHAO Yong-ming(Hunan Key Laboratory of Turbomachinery on Small and Medium Aero-Engine,AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002)

机构地区：[1]中国航发湖南动力机械研究所中小型航空发动机叶轮机械湖南省重点实验室,株洲412002

出　　处：《航空精密制造技术》2023年第4期54-56,共3页Aviation Precision Manufacturing Technology

摘　　要：某型发动机离心叶轮在试验中出现盘体掉块故障,通过对故障件的复查、分析以及补充计算,确定了该故障发生的原因。结果表明:盘体掉块故障是由径向扩压器叶片引起的高阶共振造成疲劳破坏。通过结构改进,调整了叶轮的固有模态和激振源频率,避开了该高阶振动,并通过多轮考核试验验证了改进措施的有效性。A certain type of aero-engine centrifugal impeller has a disc failure during the test.The cause of the failure through re-examination was determined.The analysis and supplementary calculation of the faulty parts were made.The results show that the failure of the disc body's rupture block was caused by the high-order resonance caused by the radial diffuser blades,which causes fatigue damage.Through the structural improvement,the natural mode of the excitation source were adjusted to avoid the high-order vibration,and the effectiveness of the improvement measures was verified through multiple rounds of assessment tests.

关 键 词：发动机 离心叶轮 盘体掉块 高阶振动 

分 类 号：TH452[机械工程—机械制造及自动化]