Failure Analysis on Fracture of Connecting Bolt between Internal Piston and Slide Valve of a Compressor
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摘 要
某螺杆压缩机内部活塞与滑阀之间的连接螺栓在使用过程中仅运行2 500 h即发生断裂.采用化学成分分析、宏观观察、光学显微镜和扫描电镜观察等方法对连接螺栓的断裂原因进行了分析.结果表明:导致连接螺栓断裂的主要原因是螺栓装配服役期间承受附加弯曲应力,在交变应力的共同作用下于应力集中的齿根周边过早萌生裂纹并疲劳扩展,最终造成螺栓断裂.
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Abstract
The bolt used for connecting internal piston and slide valve fractured in service only for 2 500 h.The fracture reasons were analyzed by means of chemical compositions analysis,macroscopic observation,metallographic examination and scanning electronic microscope fracture analysis.The results show that the main cause for the connecting bolt fracture was under the action of alternating stress,cracks formed prematurely from the stress concentration position of the tooth root caused by additional bending stress and propagated in fatigue form,which eventually caused the fracture of the connecting bolt.
中图分类号 TG113.25 TG115.2
所属栏目 质量控制与失效分析
基金项目
收稿日期 2014/3/15
修改稿日期
网络出版日期
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备注张雪庭(1987-),男,助理工程师,学士.
引用该论文: ZHANG Xue-ting. Failure Analysis on Fracture of Connecting Bolt between Internal Piston and Slide Valve of a Compressor[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2015, 51(4): 290~292
张雪庭. 某压缩机内部活塞与滑阀连接螺栓断裂失效分析[J]. 理化检验-物理分册, 2015, 51(4): 290~292
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被引情况:
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【1】孟旭丽,高玉周, "船用活塞环断裂原因分析",理化检验-物理分册 52, 189-191(2016)
【2】金静静,李玲, "某油田钻杆旋塞阀断裂原因分析",理化检验-物理分册 52, 355-359(2016)
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参考文献
【1】孙希太,杨永弟,杨铮,等.金属机械性能[M].北京:机械工业出版社,1982.
【2】GB/T 3098.1-2010紧固件机械性能 螺栓、螺钉和螺柱[S].
【3】边春华,方可伟,张维,等.高加抽汽管疏水阀气动执行机构螺栓断裂原因分析[J].理化检验-物理分册,2013,49(11):773-776,780.
【4】王荣,李玲.涡轮连接螺栓断裂失效分析[J].理化检验-物理分册,2012,48(6):397-402.
【2】GB/T 3098.1-2010紧固件机械性能 螺栓、螺钉和螺柱[S].
【3】边春华,方可伟,张维,等.高加抽汽管疏水阀气动执行机构螺栓断裂原因分析[J].理化检验-物理分册,2013,49(11):773-776,780.
【4】王荣,李玲.涡轮连接螺栓断裂失效分析[J].理化检验-物理分册,2012,48(6):397-402.
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