实测载荷下万向联轴器叉头疲劳寿命分析
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摘要
针对某中厚板厂粗轧机十字轴式万向联轴器的叉头断裂事故,通过采集接轴的应变数据,生成应变历史曲线,对现场测试的数据进行分析,得到实测的载荷时间历程。采用ANSYS与ANSYS/FE-SAFE软件对万向联轴器进行了静力学强度分析与疲劳寿命分析,找到叉头与十字轴的应力集中区和最大应力值,确定了叉头的最危险部位,估算出万向联轴器叉头的疲劳寿命与其疲劳安全系数。据此,判断出叉头断裂的原因,为叉头的结构设计及工作条件分析提供了理论依据。
Aiming at the fracture accident of universal coupling's fork in roughing mill of a heavy plate plant,a batch of monitoring data was collected,producing strain history curve. The data about torque tested in connecting shaft of the main driving system are analyzed. Combining with load time history measured,ANSYS and ANSYS/FE-SAFE were used to analyze static strength and fatigue life to universal coupling.The result is that the maximum stress value and the most dangerous parts of the fork and the crossed shaft are found out. Thereafter,the fatigue life and fatigue safety coefficient of the fork are estimated and the cause to the fork fracture is determined,which could provide theoretical basis for optimizing the structure and prolong the fatigue life of the fork.
Aiming at the fracture accident of universal coupling's fork in roughing mill of a heavy plate plant,a batch of monitoring data was collected,producing strain history curve. The data about torque tested in connecting shaft of the main driving system are analyzed. Combining with load time history measured,ANSYS and ANSYS/FE-SAFE were used to analyze static strength and fatigue life to universal coupling.The result is that the maximum stress value and the most dangerous parts of the fork and the crossed shaft are found out. Thereafter,the fatigue life and fatigue safety coefficient of the fork are estimated and the cause to the fork fracture is determined,which could provide theoretical basis for optimizing the structure and prolong the fatigue life of the fork.
引文
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[8]王彦伟,罗继伟,叶军.基于有限元的疲劳分析方法及实践[J].机械设计与制造,2008(1):22-24.(Wang Yan-wei,Luo Ji-wei,Ye Jun.Fatigue analysis method and practice based on the finite element[J].Mechanical Design and Manufacturing,2008(1):22-24.)
[2]陶魄.中厚钢板轧机扭矩监测的应用研究[J].机械设计与制造工程,2002,31(1):72-73.(Tao Po.The inspection of the torsion in rolling mill used for normal and thick plates[J].Mechanical Design and Manufacturing Engineering,2002,31(1):72-73.)
[3]孙鹏.中厚板粗轧机主传动系统动力学仿真及实验研究[D].包头:内蒙古科技大学,2011.(Sun Peng.Dynamical simulation and experimental research of main driving system of heavy plate mill[D].Baotou:Inner Mongolia University of Science and Technolog,2011.)
[4]刘静,刘学江,刘海生.CVC轧机主传动万向接轴叉头有限元分析及优化[J].机械设计与制造,2012(1):33-35.(Liu Jing,Liu Xue-jiang,Liu Hai-sheng.FEA and optimization of universal spindle head for main transmission system of CVC mill[J].Mechanical Design and Manufacturing Engineering,2012(1):33-35.)
[5]张洁,顾永玉,徐冰洲.SWC620型万向联轴器叉头结构强度有限元分析[J].现代制造工程,2004(7):55-57.(Zhang Jie,Gu Yong-yu,Xu Bing-zhou.Structure strength analysis for fork joint of SWC620 universal coupling based on FEM[J].Modern Manufacturing Engineering,2004(7):55-57.)
[6]范圣耀.中宽厚板轧钢机联轴器快速设计的应用研究[D].合肥:合肥工业大学,2004.(FanSheng-yao.Researchand application on fast design of interlocutorywidth plank main-rolling mill coupler[D].Hefei:School of Mechanical Engineering Hefei University of Technology,2004.)
[7]王平.基于ANSYS/FE-SAFE的穿孔机主传动轴疲劳寿命预测研究[D].包头:内蒙古科技大学,2011.(Wang Ping.Research on prediction of fatigue life for the main drive shaft of piercer based on ANSYS/FE-SAFE[D].Baotou:Inner Mongolia University of Science and Technology,2011.)
[8]王彦伟,罗继伟,叶军.基于有限元的疲劳分析方法及实践[J].机械设计与制造,2008(1):22-24.(Wang Yan-wei,Luo Ji-wei,Ye Jun.Fatigue analysis method and practice based on the finite element[J].Mechanical Design and Manufacturing,2008(1):22-24.)