理化检验-物理分册2025，Vol.61Issue(12)：72-76,5.DOI:10.11973/lhjy-wl240220
火力发电机组烟气换热器轴承断裂原因
Reasons for bearing fracture of flue gas heat exchanger in thermal power generation unit
XU Kai 1GU Shuchao 2ZHU Leiyuan1
作者信息
- 1. Shanghai Shangdian-Caojing Power Generation Co.,Ltd.,Shanghai 201507,China
- 2. Shanghai Minghua Electric Power Science&Technology Co.,Ltd.,Shanghai 200090,China
- 折叠
摘要
Abstract
The cylindrical roller bearing of the flue gas heater in the desulfurization system of a certain coal-fired power generation unit broke.The reasons for bearing fracture were analyzed using macroscopic observation,chemical composition analysis,scanning electron microscopy analysis,metallographic examination,hardness testing.The results show that there were obvious casting defects such as looseness,inclusions and pores in the bearing retaining frame.The angle of the bearing retaining frame did not transition smoothly,resulting in stress concentration at the corner and the initiation of microcracks.As the cracks continued to propagate,the bearing retaining frame broke,which led to abnormal stress and fracture of the bearing steel ring.Improper selection of bearing lubricating oil further accelerated the fracture process of the bearing.关键词
轴承/保持架/铸造缺陷/断裂/润滑油Key words
bearing/retaining frame/bearing casting defect/crack/lubricating oil分类
通用工业技术引用本文复制引用
XU Kai,GU Shuchao,ZHU Leiyuan..火力发电机组烟气换热器轴承断裂原因[J].理化检验-物理分册,2025,61(12):72-76,5.
