摘要
通过建立顶燃式热风炉炉壳弹塑性模型,研究了盲板力作用下热风炉炉壳的受力状态及变形情况.结果表明,在内部气体压力作用下,热风炉炉壳及热风总管变形弯曲挤压热风支管,导致热风炉炉体、总管与支管相交线附近炉壳出现应力集中,送风期热风炉热风出口顶部与底部发生塑性变形,热风炉出口附近钢壳在顶部、底部附近所受Z向拉应力及左右两侧附近所受Y向压应力的作用下向两侧拉伸并沿高度方向压缩,近似成椭圆形;送风期比燃烧期热风炉出口炉壳变形更明显,热风出口处钢壳在操作周期中的反复变形影响热风炉的寿命及稳定性.
An elastic-plastic stress mathematical model of hot blast stove shell has been established to investigate the stress distribution and deformation of the shell. The results showed that under the influence of the internal gas pressure, the hot blast stove body shell and main shell occurs bending deformation, squeezes the hot blast manifold and cause stress concentration along the intersection line of hot blast stove body, hot blast main and the hot blast manifold, especially the stove during blast period where plastic deformation occurs around the top and bottom sides of hot blast outlet. Under the influence of tensile stresses along Z-direction around the top and bottom of outlet and compression stress along Y-direction around the fight and left side of outlet, the shell near the blast outlet elongates along the horizontal direction and shortens along the vertical direction, the shell near the outlet deforms into an oval. The deformation degree of the hot blast shell near the blast outlet in blast period is much larger than that in combustion period. The repeated deformation of the shell near the outlet between different neriods may be harmfill to the long campaign life of hot blast stove.
出处
《过程工程学报》
CAS
CSCD
北大核心
2017年第4期771-778,共8页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:61571040)
关键词
顶燃式热风炉
热风炉炉壳
弹塑性应力模型
受力分析
操作周期
top combustion hot blast stove
hot blast stove shell
elastic-plastic stress mathematical model
stress analysis
operation period
