宽工况条件下压缩机叶根连接件损伤容限分析  

Damage Tolerance Analysis of Compressor Blade Root Connector in Wide Operation Condition

作　　者：聂徐庆 周恩民[1] 肖卫华 顾恒庆 廖达雄[1] Xu-Qing Nie;En-Min Zhou;Wei-Hua Xiao;Heng-Qing Gu;Da-Xiong Liao(China Aerodynamics Research and Development Center;Jiangsu Xinyang New Material Co.,Ltd.;Shanghai Electric Blower Works Co.,Ltd.)

机构地区：[1]中国空气动力研究与发展中心 [2]江苏新扬新材料股份有限公司 [3]上海电气鼓风机厂有限公司

出　　处：《风机技术》2022年第5期52-56,共5页Chinese Journal of Turbomachinery

摘　　要：某压缩机叶片采用钛合金(Ti-6Al-4V)作为叶根金属连接件材料,并且工作在宽温域和交变载荷条件下。在满足静强度和疲劳强度设计的基础上,还必须考虑材料的损伤容限问题,以合理评估其抵抗微小裂纹扩展和断裂的能力。本文在充分调研裂纹扩展速率、断裂韧性等基本材料性能的基础上,结合压缩机服役载荷谱,基于经典Paris公式计算不同工况裂纹扩展情况,并评估其服役安全性,为叶根选材提供参考依据,并给出了机组运行的建议。The material of a compressor blade root connector is titanium TI 6AL-4V,which works in a wide temperature range and alternating load conditions.On the basis of satisfying the design of static strength and fatigue strength,the damage tolerance of the material should be considered to reasonably evaluate its resistance to micro crack propagation and fracture.Based on the investigation of crack growth rate,fracture toughness and other basic material properties,combined with the service load spectrum of the compressor,this paper calculates the crack growth progress under different working conditions using the classic Paris formula,and evaluates its service life,so as to provide reference for blade root material selection,and gives suggestions for compressor operation.

关 键 词：钛合金 低温工况 压缩机 叶根 损伤容限 运行 

分 类 号：TH452[机械工程—机械制造及自动化]