风扇传动轴断裂原因  

Fracture reason of fan drive shaft

作　　者：吕卓峰 贾路 白晶 吕思雨 刘西西 许莞琪 姬丙寅 LYU Zhuofeng;JIA Lu;BAI Jing;LYU Siyu;LIU Xixi;XU Wanqi;JI Bingyin(Material Supply Management Center,SINOPEC Northwest China Petroleum Bureau,Luntai 841600,China;Material Supply Department Quality Control Center,PetroChina Changqing Oilfield Branch Co.,Ltd.,Xianyang 712000,China;Xi’an Serv Stress Engineering Technology Service Co.,Ltd.,Xi’an 710075,China)

机构地区：[1]中石化西北油田分公司物资供应管理中心,轮台841600 [2]中国石油长庆油田分公司物资供应处质量管控中心,咸阳712000 [3]西安三维应力工程技术有限公司,西安710075

出　　处：《理化检验(物理分册)》2025年第1期53-56,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：采用宏观观察、化学成分分析、力学性能测试、扫描电镜分析等方法对某42CrMo4钢风扇传动轴断裂原因进行分析。结果表明:风扇轴发生早期扭转疲劳断裂的主要原因是电机系统(轴承、风扇、风扇轴)运行过程中,滚动轴承额定承载能力存在薄弱点,使轴承出现早期偏磨损伤,系统出现剧烈的扭转振动,导致轴承发生扭转疲劳断裂。建议改进电机系统的稳定性,如使用滑动轴承。The fracture causes of a 42CrMo4 steel fan drive shaft were analyzed by means of macroscopic observation,chemical composition analysis,mechanical property test and scanning electron microscope analysis.The results show that the main reason for the early torsional fatigue fracture of the fan shaft was that during the operation of the motor system(bearing,fan,fan shaft),there was a weak point in the rated bearing capacity of the rolling bearing,which caused early eccentric wear damage to the bearing and severe torsional vibration of the system,resulting in torsional fatigue fracture of the bearing.It was recommended to improve the stability of the motor system,such as the use of sliding bearings.

关 键 词：风扇轴 脆性断裂 疲劳 扭转撕裂 应力集中 偏磨 

分 类 号：TG115.2[金属学及工艺—物理冶金] TB31[金属学及工艺—金属学]