某石油钻井绞车链轮传动轴断裂原因
Fracture Cause of Chain Wheel Drive Shaft in an Oil Drilling Drawwork
摘 要
某石油钻井绞车在运行过程中链轮传动轴突然断裂，通过断口形貌观察、化学成分分析、力学性能测试、显微组织观察等方法，研究了链轮传动轴断裂的原因。结果表明：链轮传动轴的断裂属于早期疲劳失效。裂纹在链轮传动轴φ210 mm与φ200 mm轴台阶处的粗糙过渡圆角根部应力集中处萌生，在交变弯扭应力作用下扩展，最终导致链轮传动轴的疲劳断裂；组织中存在的片状MnS夹杂物以及心部带状偏析组织促进了疲劳裂纹的扩展。
疲劳断裂
应力集中
MnS夹杂物
带状偏析
chain wheel drive shaft
fatigue fracture
stress concentration
MnS inclusion
banded segregation
Abstract
The fracture of chain wheel drive shaft in an oil drilling drawwork during operation ocurred. The reason for fracture of the chain wheel drive shaft was studied by fracture morphology observation, chemical composition analysis, mechanical property test and microstructure observation. The results show that the fracture of chain wheel drive shaft was early fatigue failure. The cracks initiated at the stress concentration of the rough transition fillet root at the step of φ210 mm and φ200 mm shafts of the chain wheel drive shaft, and expanded under alternating bending and torsion stresses, leading to the fatigue fracture of the chain wheel drive shaft finally. The existence of lamellar MnS inclusions in the structure and the banded segregation in the core promoted the growth of fatigue cracks.
中图分类号 TG115 DOI 10.11973/jxgccl202101018
所属栏目 失效分析
基金项目 “十三五”国家科技重大专项项目（2016ZX05020）
收稿日期 2020/1/21
修改稿日期 2020/12/1
网络出版日期
作者单位点击查看
备注樊春明(1975-),男,四川南充人,高级工程师,硕士
引用该论文: FAN Chunming,ZHANG Zengnian,WANG Degui,XU Hong,WANG Pinghuai. Fracture Cause of Chain Wheel Drive Shaft in an Oil Drilling Drawwork[J]. Materials for mechancial engineering, 2021, 45(1): 109～112
樊春明,张增年,王德贵,徐虹,王平怀. 某石油钻井绞车链轮传动轴断裂原因[J]. 机械工程材料, 2021, 45(1): 109～112
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参考文献
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【8】张连山.石油钻机绞车的设计与计算[J].石油机械,1997, 25(9):45-47. ZHANG L S. Design and calculation of oil rig drawworks[J]. Petroleum Machinery, 1997,25(9):45-47.
【9】周天明,彭勇,贾秉彦,等.JC-90DB两挡齿轮传动单轴绞车设计分析[J].石油机械,2008,36(12):35-37. ZHOU T M, PENG Y, JIA B Y, et al. Design and analysis of JC-90 DB single shaft winch with two gears transmission[J].Petroleum Machinery, 2008,36(12):35-37.
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