罩式退火炉炉台密封圈的有限元分析

Finite element analysis on seal ring for coil base of bell-type annealing furnace

由于炉台密封失效是钢卷退火时发生表面氧化的主要原因之一,为了寻求炉台密封圈密封失效的原因机理,采用有限元分析软件ANSYS对其进行了有限元分析,结果表明:炉台密封圈内部应力分布不均匀,在密封圈与内罩接触处有应力集中;密封圈沿X方向的变形量较大,几乎达到密封圈的中心线处;密封圈与内罩接触处的左侧边缘处,以及密封圈右侧与安装槽的接触点处较易发生破坏而影响密封质量;密封圈的截面内径越小、材料弹性越好,则其综合密封性能越好。

Invalidation of the seal ring for coil base is one of the main reasons that the surface oxidation occurs during annealing of steel strip coil. The finite element analysis was performed with finite element analysis soft-ware ANSY to explore its failure mechanism. The results show that the internal stress distribution of the seal ring for coil base is uneven and there is stress concentration at the contact surface of seal ring and inner cover, the deformation of seal ring is great along X direction so that it almost reaches the center line of seal ring, the left edge at the contact point of seal ring with inner cover and the contact point at the right of seal ring with the mounting groove are easy to be destroyed to make sealing effect worsen, and the smaller the section inner diameter of seal ring is, the better the material elastic and comprehensive sealing performance of the seal ring become