加热炉炉辊温度场数值模拟及结构改进研究
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摘要
为解决某钢厂CSP(紧凑式带钢生产线)加热炉水冷炉辊辊环出现变形过量、烧蚀等失效问题,从流固耦合传热理论出发,对水冷炉辊结构进行简化与离散处理,建立炉辊三维稳态流固耦合传热有限元模型,进行了温度场仿真分析,结果表明辊环温度过高是引起失效的重要原因。计算得到的冷却水出口温度与工业现场测得的误差小于2%,仿真结果具有较高的可信度。在不增加制造成本的前提下,提出了炉辊结构的改进方案,以达到降低辊环温度的目的。相同条件下的温度场分析结果表明,改进结构辊环最高温度较原结构降低了16.5%,验证了结构改进的合理性。
In order to solve the excessive deformation and ablation of the roller ring in the CSP furnace,starting from the fluid-solid coupled heat transfer theory,the simplified model of the water-cooled furnace roller was discreted,and the threedimensional steady-state fluid-solid coupling heat transfer finite element model was established. The temperature field simulation results showed that the too high temperature was an important cause of the failure of the roller ring. Comparing the outlet temperature of cooling water between the simulation results and field monitoring,the error was less than 2%,which showed the simulation results had a high reliability. On the premise of not increasing the cost of manufacturing the roller ring,the structure of the furnace rollers was improved to reduce the temperature of the roller ring. Under the same conditions,temperature field analysis results showed that the improved roller ring's highest temperature was 16.5% lower than the original,and verified the rationality of improved structure.
In order to solve the excessive deformation and ablation of the roller ring in the CSP furnace,starting from the fluid-solid coupled heat transfer theory,the simplified model of the water-cooled furnace roller was discreted,and the threedimensional steady-state fluid-solid coupling heat transfer finite element model was established. The temperature field simulation results showed that the too high temperature was an important cause of the failure of the roller ring. Comparing the outlet temperature of cooling water between the simulation results and field monitoring,the error was less than 2%,which showed the simulation results had a high reliability. On the premise of not increasing the cost of manufacturing the roller ring,the structure of the furnace rollers was improved to reduce the temperature of the roller ring. Under the same conditions,temperature field analysis results showed that the improved roller ring's highest temperature was 16.5% lower than the original,and verified the rationality of improved structure.
引文
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[2]Mohammad Hosein Bina,Ghasem Dini,Sayed Mahmoud Monir Vaghefi.Application of homogenization heat treatments to improve continuousannealing furnace roller fractures[J].Engineering Failure Analysis,2009(16):1720-1726.
[3]冯立义,周建平,张骞.CSP加热炉炉辊辊环的研制[J].包钢科技,2004,30(2):70-72.(Feng Li-yi,Zhou Jian-ping,Zhang Qian.Development of CSP furnace roller ring[J].Science&Technology of Baotou Steel(Group)Corporation,2004,30(2):70-72.)
[4]吴波.CSP加热炉炉辊辊环改造及优化[J].甘肃科技,2011,27(22):30-31.(Wu Bo.CSP heating furnace roller ring transformation and optimization[J].Gansu Science and Technology,2011,27(22):30-31.)
[5]张师帅.计算流体动力学及其应用[M].武汉:华中科技大学出版社,2011(1).(Zhang Shi-shuai.Computational Fluid Dynamics and its Application[M].Wuhan:Huazhong University of Science and Technology Press,2011(1).)
[6]Zhou Nai-jun,Zhou Shan-hong,Zhang Jia-qi.Numerical simulation of aluminum holding furnace with fluid-solid coupled heat transfer[J].Cen.South Univ.Technol,2010(17):1389-1394.
[7]江泽毅,张欣欣,董补全.环形加热炉传热数学模型研究[J].钢铁,2000,35(3).(Jiang Ze-yi,Zhang Xin-xin,Dong Bu-quan.Study on mathematical model of heat transfer for rotary furnace[J].Iron&Steel,2000,35(3).)
[8]秦裕琨.炉内传热[M].北京:机械工业出版社,1981.(Qin Yu-kun.Heat Transfer in Furnace[M].Beijing:Machinery Industry Press,1981.)
[9]宁宝林,杨泽宽,盛中权.加热炉热滑轨预示计算数学模型[J].东北工学院学报,1982(4):15-26.(Ning Bao-lin,Yang Ze-kuan,Sheng Zhong-quan.Heating furnace hot slide predictive mathematical model[J].Journal of Northeast Institute of Technology,1982(4):15-26.)
[10]杨君刚.材料加热炉基础[M].西安:西北工业大学出版社,2009(12).(Yang Jun-gang.The Basic Materials of Heating Furnace[M].Xi’an:Northwestern Polytechnical University Press,2009(12).)
[11]刘占增,杨超,刘文清.CSP均热炉内板坯传热数值模拟研究[J].工业加热,2012,41(5):26-28.(Liu Zhan-Zeng,Yang Chao,Liu Wen-qing.Research on numerical simulation of the slab heat transfer in CSP Furnace[J].Industrial Heating,2012,41(5):26-28.)
[12]滕长岺.耐热钢[M].北京:中国标准出版社,2010(8).(Teng Chang-ling.Heat Resistant Steel[M].Beijing:Chinese Standards Press,2010(8).)
[13]武汉钢铁集团公司.CSP加热炉用高温炉辊:中国,201210114027.4[P].2012-08-01.(Wuhan Iron and Steel Group Company.High-temperature furnace roller in CSP furnace:China,201210114027.4[P].2012-08-01.