基于集肤效应的大直径薄壁弯管感应加热

发布时间：2019-03-04 11:37

【摘要】：大直径薄壁弯头广泛应用于油气输送管道工程,采用局部感应加热并通过液压推制成形是弯管加工的主要工艺方法,由此,装备的液压推制速度和感应加热参数的准确匹配成为影响弯管质量的重要因素。针对感应加热过程中集肤效应对加热效果影响的不确定性,在感应加热理论分析的基础上,研究了基于集肤效应的关键参数,同时借助有限元模拟计算的方法,分析各工艺参数对管材感应加热过程中焦耳热分布的影响,并通过建立正交试验实现参数组优化。结果表明:感应加热装置的设计应综合考虑电流频率、电流密度、管材与感应圈距离3个参数的变化梯度对集肤效应的影响,得到最优参数组,为与之相匹配的弯管推制速度提供准确的设计参数要求,在保障弯管质量的同时,大大提高装备现场调试及生产的效率。
[Abstract]:Large diameter thin wall elbows are widely used in oil and gas transmission pipeline engineering. Local induction heating and hydraulic push forming are the main process methods of bending pipe processing. The accurate matching of hydraulic pushing speed and induction heating parameters of equipment is an important factor affecting the quality of bending pipe. In view of the uncertainty of skin effect on heating effect in induction heating process, the key parameters based on skin effect are studied on the basis of theoretical analysis of induction heating, and the method of finite element simulation is used at the same time. The influence of process parameters on Joule heat distribution during induction heating was analyzed, and the optimization of parameters was realized by establishing orthogonal test. The results show that the influence of three parameters, current frequency, current density and distance between tube and induction ring, on skin effect should be taken into account in the design of induction heating device, and the optimal parameter group can be obtained. In order to provide accurate design parameters for the matching bending pipe pushing speed, the quality of bending pipe can be guaranteed and the efficiency of on-site debugging and production of equipment can be greatly improved.
【作者单位】：西安科技大学机械工程学院;中国重型机械研究院有限公司;
【基金】：国家自然科学基金资助项目“轻水堆关键焊接接头环境致裂机理与残余寿命预测方法”,51475362 陕西省自然科学基金资助项目“核电大锻件回火处理中小裂纹扩展机理及结构安全性研究”,2015JM5257
【分类号】：TE973

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