理化检验-物理分册2018，Vol.54Issue(6)：447-452,6.DOI:10.11973/lhjy-wl201806013
低压加热器疏水泵导流壳连接螺栓断裂失效分析
Failure Analysis on Fracture of Connecting Bolts of Diversion Shell for Low Pressure Heater Drainage Pump
周健聪1
作者信息
- 1. 广东省粤泷发电有限责任公司,罗定 527200
- 折叠
摘要
Abstract
In view of the fracture failure of the connection bolts of diversion shell for low pressure heater drainage pump in a power plant,means such as macroscopic examination,chemical composition analysis,hardness test,metallographic examination and scanning electron microscope fracture analysis were used to analyze the fracture causes of the bolts.The results show that the fracture of the bolts was a typical toughness overload fracture. On the one hand,there were forming defects at the bottom of screw thread of the bolts,which resulted in stress concentration and reduced the bearing capacity of the bolts.On the other hand,the operating state of the drainage system was unstable and the drainage pump was subj ected to a relatively large impact load.The co-action of the two above factors resulted in the overload fracture of the connection bolts at the bottom of the stress concentrated screw thread of the joint surface position.Finally,improvement suggestions were put forward.关键词
疏水泵/连接螺栓/过载断裂/成型缺陷/振动/失效分析Key words
drainage pump/connecting bolt/overload fracture/forming defect/vibration/failure analysis分类
矿业与冶金引用本文复制引用
周健聪..低压加热器疏水泵导流壳连接螺栓断裂失效分析[J].理化检验-物理分册,2018,54(6):447-452,6.
