方坯连铸机拉矫机负荷分配控制

来源期刊：冶金自动化2010年第2期

论文作者：朱莉彬

文章页码：38 - 44

关键词：方坯连铸机； 拉矫机； 转矩； 负荷分配； 控制

Key words：billet continuous caster； withdrawal machine； torque； load distribution； control

摘    要：拉矫机是连铸机的关键工艺设备,实现引锭杆上装和连铸坯的拉出和矫直。由于拉矫机由多台传动电动机组成且整体运行,因此无论是采用U/f还是矢量控制方法,各拉矫电动机的负载经常不一致,影响拉矫机的整体驱动性能及使用寿命。针对该问题,攀钢信息工程技术有限公司开发了拉矫机负荷分配控制系统,在攀钢2#大方坯连铸机5辊驱动拉矫机上,采用了PLC的拉矫转矩闭环控制和变频器的拉速闭环控制相结合的控制策略,将拉矫负荷均衡分配到各拉矫辊电动机上,实现了负荷分配控制功能。实际运行效果表明,该功能可保证作用在红坯上的拉力平稳均衡,满足了生产要求。

Abstract: Withdrawal machine is a key process equipment in continuous caster,and applied to charging of dummy bar,and withdrawal and straightening of strand.Since withdrawal machine is composed of several drive motors which run as a whole,no matter what U/f or vector control method was adopted,load of each withdrawal motor was different frequently.Therefore,whole capability and life of withdrawal machine were affected.To solve the problem,a load distribution control system of withdrawal machine was developed by Pangang Information Engineering Technology Co.,Ltd.In five motors withdrawal machine of Pangang 2# billet continuous caster,PLC withdrawal torque close loop control was combined with withdrawal speed close loop control of converter,so that withdrawal load force was equally distributed on each withdrawal motor and load distribution control function was achieved.Practical operation results show that the function can ensure stable and equal withdrawal force on strand,and production requirement was satisfied.