摘要
大型门式起重机因变速机轴断裂致使起吊物料下坠而造成安全生产事故。通过宏观和微观分析方法对变速机轴断裂原因进行了分析,结果表明,变速机轴在长期服役运行过程中,因局部疲劳开裂并扩展而引发了瞬间脆性断裂,其断裂与轴的制造质量不高和长达50a(年)的服役时间有关。
The drop of lifted body with a production safety accident was caused by the fracture of the variablespeed motor shaft of the large-sized gantry crane. The fracture causes of the variable-speed motor shaft were analyzed by using macroscopic-and microscopic analysis methods. The results showed that the immediate brittle fracture was triggered by local fatigue cracking and extending of variable-speed motor shaft in long-duration operation, and the fracture of the shaft was related to the low manufacturing quality and about fifty years active time.
出处
《理化检验（物理分册）》
CAS
2008年第3期157-161,共5页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
门式起重机
变速机轴
疲劳断裂
脆性断裂
Gantry crane
Variable-speed shaft
Fatigue fracture
Brittle fracture
