多级泵轴断裂分析  

Analysis of multistage pump shaft fracture

作　　者：齐学义[1] 王岩[1] 敏政[1] 

机构地区：[1]兰州理工大学流体动力与控制学院,甘肃兰州730050

出　　处：《江苏大学学报（自然科学版）》2008年第6期502-506,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：甘肃省科技攻关计划项目(2GS047-A52-011)

摘　　要：针对某化工企业引进的国外多级高压烃泵主轴发生断裂事故,结合该轴材料和断口形貌,运用机械可靠性设计原理和方法进行了计算和分析,以探寻其断裂的主要原因.计算分析结果与实际运行表明,该泵选型扬程过高,使泵轴的综合工作应力大,又存在局部应力集中,加之氯离子的腐蚀,因而轴的可靠性较低,导致发生疲劳失效而断裂.据此,文中提出了相应的改进措施.Concerning with the fracture accident of overseas multistage high-pressure hydrocarbon pump shaft used in some chemical plants, by combining the shaft materials and fracture appearance, and using mechanical reliability design theory and methods we calculate and analyze the main fracture reasons. The calculated results show that the pump head selection is too high, making the shaft with a large integrated working stress. In addition there exists local stress concentration, together with chloride ion corrosion, so the shaft reliability is lower, leading to fatigue failure and fracture. Accordingly, the corresponding improved measures are proposed.

关 键 词：泵轴 疲劳断裂 可靠性设计 应力集中 改进措施 

分 类 号：TH311[机械工程—机械制造及自动化]