基于热-结构耦合炉管吊钩结构优化前后的对比分析

Comparative Analysis of Furnace Pipe Telpher after and before the Structural Optimazation Designs Based on Thermal Structural Coupling

管式加热炉的炉管吊钩是用于支撑辐射段炉管的核心部件,材质一般为耐热型不锈钢。为进一步降低其造价成本,对传统炉管吊钩进行了结构优化设计。根据结构受力特点,通过将厚重的腹板优化为镂空设计,将支座分为上下布置,取消传统设计的腹板两侧的筋板,实现经优化后的结构质量是原设计的1/3。进一步应用ANSYS软件对两种吊钩进行热-结构耦合数值模拟对比分析,吊钩材料均选用ZG40Cr25Ni12。研究结果表明:在相同荷载下,新型炉管吊钩的高温区面积、总体变形以及等效应力最大值均小于传统炉管吊钩。应力最大点均位于螺栓孔安装面且大于材料的屈服强度,通过对结构危险点的应力线性化校核,证明了优化后的结构能够满足设计要求,在确保安全稳定的同时,大幅降低了制造成本。

The furnace tube hook of the tubular heating furnace is the core component used to support the furnace tube of the radiation section,and the material is generally heat⁃resistant stainless steel.In order to further reduce its cost,the structure optimization design of the traditional furnace pipe hook is carried out.According to the mechanical characteristics of the structure,by optimizing the thick web into a hollow de⁃sign,the support is divided into upper and lower layout,and the reinforcement plates on both sides of the traditional design of the web are e⁃liminated,so that the optimized structure quality is 1/3 of the original design.The thermal and structural coupling numerical simulation of the two hooks was compared and analyzed by ANSYS software.The hook material was ZG40Cr25Ni12.The results show that under the same load,the high temperature area,the total deformation and the maximum equivalent stress of the new furnace pipe hook are smaller than that of the traditional furnace pipe hook.The maximum stress points are located at the bolt hole mounting surface and are greater than the yield strength of the material.Through the stress linearization check of the structural danger points,it is proved that the optimized structure can meet the de⁃sign requirements,ensure safety and stability,and greatly reduce the manufacturing cost.