鄂钢130t转炉球绞支承耳板焊缝开裂分析
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摘要
鄂钢某转炉位于托圈上的支承螺栓支承耳板屡次发生焊缝开裂,且耳板与支承螺栓之间的联接销轴经常出现磨损。采用现场实测与有限元仿真分析相结合的方法,对焊缝开裂原因进行深入分析,研究表明,转炉在炼钢过程中,由于倾角变化时角加速度过大,产生的冲击会诱发焊缝应力集中部位的开裂。根据研究结果,提出一系列降低冲击的措施,有效遏制了焊缝裂纹开裂故障的发生。
The welding seam cracking of the supporting bolt support ear plate in a converter of Egang is repeated, and the joint shaft between the ear plate and the supporting bolt is often worn. Based on field test and finite element simulation analysis, the causes of weld cracking are analyzed deeply. The results show that due to the large angular acceleration in the process of steelmaking, the impact will induce the cracking of weld stress concentration. According to the research results, a series of measures to reduce the impact are put forward, which can effectively curb the occurrence of weld crack failure.
The welding seam cracking of the supporting bolt support ear plate in a converter of Egang is repeated, and the joint shaft between the ear plate and the supporting bolt is often worn. Based on field test and finite element simulation analysis, the causes of weld cracking are analyzed deeply. The results show that due to the large angular acceleration in the process of steelmaking, the impact will induce the cracking of weld stress concentration. According to the research results, a series of measures to reduce the impact are put forward, which can effectively curb the occurrence of weld crack failure.
引文
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[14]张立伟.炉体连接装置的冲击载荷对自调螺栓的强度影响研究[D].武汉科技大学,2016.
[2]乔沙林,董宁,罗会信.150t转炉热-固耦合应力仿真分析研究[J].铸造技术,2012,33(2):228-231.
[3]蒋基洪.转炉扭力杆的失效分析与修复研究[J].机械设计与制造,2013(5):269-272.
[4]魏国前,陈定方,罗会信,等.基于三维CAD的转炉倾动力矩计算与仿真[J].武汉理工大学学报(交通科学与工程版),2009,33(3):537-540.
[5]张玉忠,王铁.转炉倾动装置的优化设计[J].机械传动,2006,30(5):88-90.
[6]古莹奎,邱光琦,仝翔翔.全悬挂转炉倾动系统动力学特性分析[J].机械设计与制造,2014(4):235-237.
[7]张珂,高立新,陈磊.转炉倾动机构动力学系统的不平衡性研究[J].机械设计与制造,2013(2):119-121.
[8]林建筑,冀留庆,徐旺.转炉减速器齿轮传动系统振动分析[J].新技术新工艺,2012(8):12-13.
[9]张忠纯,王会刚,李自芹.基于ANSYS转炉托圈的机械应力及模态分析[J].机械设计与制造,2009(11):126-127.
[10]杨林建,吴先文,李剑.基于有限元法的转炉托圈应力分析研究[J].机械设计与制造,2011(7):204-205.
[11]罗会信,严开勇,黄坤平,等.受损托圈承载应力的数值仿真分析[J].钢铁研究,2004,32(5):46-49.
[12]邵文军,郭世红.全悬挂转炉倾动机构的动态仿真及缓冲弹簧调整[J].冶金设备,2009(5):13-16.
[13]康福,罗会信,党章,等.90t转炉托圈承载能力有限元分析[J].武汉科技大学学报,2014,37(1):40-44.
[14]张立伟.炉体连接装置的冲击载荷对自调螺栓的强度影响研究[D].武汉科技大学,2016.