拉矫机内吹扫流场分析及优化

Analysis and Optimization of Purge Flow Field in Tension Leveler

采用ANSYS软件对拉矫机内吹扫流场进行了分析。结果表明:优化前吹扫梁上8个喷嘴间距为19 cm,喷嘴长度为6.7 cm,空气喷嘴与竖直方向成45°,喷嘴之间的空气吹扫流场相互干扰,带钢上出现氧化铁皮颗粒滞留区。优化后吹扫梁上9个喷嘴间距为16.625 cm,中间1个喷嘴长度为8.7 cm,其它喷嘴长度均为6.7 cm,喷嘴与竖直方向成45°,且左侧4个喷嘴沿垂直吹扫梁方向右偏10°,右侧4个喷嘴沿垂直吹扫梁方向左偏10°,空气喷嘴之间的吹扫流场干扰有明显改善,带钢上没有出现氧化铁皮颗粒滞留区。拉矫机内吹扫流场优化后,酸洗板面凹坑月平均缺陷率为0.43%,比流场优化前降低了2.98%。

The purge flow field in the tension leveler was analyzed by ANSYS software.Before optimization,the distance between 8 nozzles on the purging beam is 19 cm,the nozzle length is 6.7cm,the air nozzle is 45° to the vertical direction,and the nozzle length is 6.7 cm.So the air purging flow field between the nozzles interferes with each other,and the iron oxide scale particle retention zone appeared on the strip steel.After optimization,the distance between the nine nozzles on the purging beam is 16.625 cm,the length of the middle nozzle is 8.7 cm,and the length of the other nozzles is 6.7 cm.The nozzle is 45° from the vertical direction,and the four nozzles on the left side are 10° to the right along the direction of the vertical purging beam,and the four nozzles on the right side are 10 ° to the left along the direction of the vertical purging beam.The interference of the purging flow field between the air nozzles has been significantly improved,and there is no iron oxide scale particle retention area on the strip steel.Also the monthly average defect rate of pits on the pickled plate surface is 0.43%,which is 2.98% lower than that before the optimization of the flow field.