连铸机旋转塔减速器可靠性优化分析  

Reliability optimization analysis of reducer for continuous casting machine rotating tower

作　　者：白华 乔永钦 章勤奋 都胜朝 BAI Hua;QIAO Yongqin;ZHANG Qinfen;DU Shengchao(Wuhan Iron and Steel Co.,Ltd.,Wuhan 430083,China;Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]武汉钢铁有限公司,湖北武汉430083 [2]郑州机械研究所有限公司,河南郑州450001

出　　处：《重型机械》2024年第4期95-102,共8页Heavy Machinery

摘　　要：连铸机旋转塔减速器的可靠性提高对炼钢铸机连续生产的安全性意义重大。某连铸机旋转塔减速器运行过程经常发生输入端锥齿轮轴断裂,通过断口分析其疲劳情况,断裂原因为低周旋转弯曲疲劳断裂,且断裂部位存在较大应力集中,所受载荷过大超出轴的疲劳极限。对锥齿轮轴几何参数进行优化,增大过渡圆角,降低圆角区域表面粗糙度,以降低应力集中及疲劳裂纹的产生。结合有限元仿真,优化后的锥齿轮轴在额定及极限工况下,应力集中降低约45%,形变位移量降低约30%,并满足额定及极限工况下的疲劳校核。Improving the reliability of ladle turret reducer of continuous casting machine rotating tower has great significance for the security of continuous production of steel casting machine.A continuous casting machine rotating tower reducer operating process often occurs bevel gear shaft fracture at the input part,by analyzing the fracture to understand its fatigue condition,the cause of fracture is low cycle rotational bending fatigue fracture,and there is significant stress concentration at the fracture site,resulting in excessive load beyond the fatigue limit of the shaft.To reduce the stress concentration and fatigue cracks,this paper optimizes the geometric parameters of the bevel gear shaft,increases the transition fillet,and reduces the surface roughness of the fillet area.Through the finite element simulation,the optimized bevel gear shaft can reduce the stress concentration by about 45%and the deformation displacement by about 30%under the rated and ultimate working conditions,which meet the fatigue calibration under rated and extreme working conditions.

关 键 词：减速器 齿轮轴 断裂分析 应力集中 

分 类 号：TH132.46[机械工程—机械制造及自动化]