风电偏航双列球轴承外圈断裂的原因  

Cause of outer ring fracture of yaw double row ball bearing in wind-power

作　　者：仵永刚 WU Yonggang(Luoyang LYC Bearing Co.,Ltd.,Luoyang 471039,China;State Key Laboratory of Aviation Precision Bearings,Luoyang 471039,China;Henan High-end Bearing Industry Research Institute,Luoyang 471039,China;Henan Technology Innovation Center of Bearing,Luoyang 471039,China)

机构地区：[1]洛阳LYC轴承有限公司,洛阳471039 [2]航空精密轴承国家重点实验室,洛阳471039 [3]河南省高端轴承产业研究院,洛阳471039 [4]河南省轴承技术创新中心,洛阳471039

出　　处：《理化检验（物理分册）》2023年第1期54-56,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某型风电偏航双列球轴承外圈在服役过程中发生断裂。采用宏观观察、化学成分分析、金相检验、力学性能测试、扫描电镜及能谱分析等方法,分析了该轴承外圈断裂的原因。结果表明:轴承外圈断裂源部位存在应力集中,接触表面有摩擦塑性变形损伤,腐蚀部位产生疲劳裂纹并逐步扩展,最终导致轴承外圈发生断裂。The outer ring of a certain type of yaw double row ball bearing in wind-power was fractured during service. The fracture reason of the bearing outer ring was analyzed by means of macroscopic observation, chemical composition analysis, metallographic examination, mechanical property test, scanning electron microscope and energy spectrum analysis. The results show that the stress concentration existed at the fracture source of the bearing outer ring, the friction plastic deformation damage existed on the contact surface, and the fatigue cracks occurred at the corrosion part and gradually expanded, finally led to the fracture of the bearing outer ring.

关 键 词：风电偏航轴承 疲劳断裂 应力集中 摩擦损伤 腐蚀 

分 类 号：TB31[一般工业技术—材料科学与工程] TH133.331[机械工程—机械制造及自动化]