重軌矫直扭矩控制模型研究及应用.docVIP

重轨矫直扭矩控制模型研究及应用 陶功明 朱华林 赵云 邓淑惠 张建 陈崇木 （攀钢新钢钒轨梁厂 四川攀枝花 617062） 【摘要】扭矩干涉是矫直生产的“顽疾”，各辊单独传动是解决干涉最好改进方法。各辊的矫直速度不及时调整同样会产生严重的扭矩“干涉”。矫直速度的调整方法较多，本文介绍了一种通过调整矫直辊名义直径而改变矫直速度的方法，分析了矫直线速度与中心层高度、压下量、矫直节距及矫直辊直径的关系及理论线速度与实际线速度存在差异的原因。结合理论分析及现场数据建立了矫直扭矩干涉的控制模型。该模型投用后，大大减轻了矫直扭矩干涉现象。矫直扭矩绝对值从模型使用前的87%降低到使用后的21%左右，下降了66个百分点。显著降低了矫直机电耗及设备损坏，提高了生产作业率。 【关键词】矫直扭矩；干涉；控制模型；中性层；线速度 Research Application of Control Model of Straightening Torque for Rail Tao Gongming, Zhu Hualin, Zhao Yun, Deng Shuhui, Zhang Jian, Chen Congmu (Rail Beam Plant of Panzhihua Steel Vanadium Co.,Ltd, Panzhihua 617062, Sichuan) Abstract: Torque interference is one of the most complicated issues to resolve in straightening process, and individual drive is the best way to solve. It is necessary to adjust roll speed in time for preventing torque interference, and there are many ways to adjust straightening speed. In this paper, the method of change straightening speed by adjusting nominal roll diameter was adopted, the correlation between the straightening linear velocity and the height of centre layer, reduction, roll pitch and diameter, and the reason of the difference between theoretical and actual velocity were analyzed. According to the theoretical analysis and practical data, the control model for rail straightening torque was built. After using of the model, the roll torque interference was significantly reduced, the absolute torque value was decreased from 87% to about 21%, and the power consumption and equipment damage of straightening mill were significantly reduced, and the productivity was improved. Keywords: straightening torque, torque interference, control model, centre layer, linear velocity 1前言 单独传动的矫直辊避免了集体传动中不同矫直辊之间的“拖拽”现象。“拖拽”是矫直过程不同矫直辊对钢轨压下量不同而对钢轨产生不同的带动速度所致。单独传动的矫直机使用时如果采用相同的的线速度，各矫直辊单独调整速度的功能不但没有得到有效运用，而且产生严重的干涉扭矩。经常出现矫直电机跳闸、过烧和矫直锥套异常损坏的现象。 人工微调各辊径值或矫直辊转速可解决各辊扭矩干涉，但存在调整不及时的问题。不同矫直辊、不同弯曲度、不同一材质不同规格的钢轨每一次的微调值不一样。靠人工经验调整，一般要经过6-7次调整才能到位。同时，人工微调辊径值后，操作屏上显示的辊径值与实际值不一样，操作屏上的矫直压下规程也与实际压下规程