外部水冷对热轧卷取机扇形板温度场分布影响的研究

Study on Influence of External Water Cooling on Temperature Field Distribution of Hot Rolling Coiler Sector Plate

热轧行业当中扇形板外表面的龟裂是卷取设备主要的失效形式。外部水冷方式的不同所造成的各自温度场的不同对这种失效影响很大。通过扇形板导热问题的数值方法的求解分析,对比有水冷及无水冷两种不同的冷却工艺。运用ANSYS APDL仿真软件进行瞬态温度场分析。获得第十卷卷钢结束和该卷卷取结束两个时刻点的内外表面和中间截面温度场分布情况,以及关键节点温度随时间变化情况。分析结果表明,反复的极冷极热的冷却工艺产生的扇形板热疲劳现象对其使用寿命十分不利。

In the hot rolling industry,the cracking of sector plate is the main failure mode of coiler.The different temperature fields caused by different external water-cooling methods have great influence on the failure.Through the numerical analysis of the heat conduction problem of the sector plate,two different cooling processes with water cooling and anhydrous cooling are compared.ANSYS APDL simulation software is used to analyze the transient temperature field.The temperature field distribution of the inner and outer surface and the middle section at the end of the tenth coil and the end of the coiling process,as well as the temperature variation of the key nodes with time,are obtained.The results show that the thermal fatigue of sector plate caused by repeated extremely cold and extremely hot cooling process is very unfavorable to its service life.