轧钢机油膜轴承临界轧速与板厚调控分析

Analyses of the critical rolling speed for oil film bearing and strip gauge control in rolling mill

板带轧机广泛应用全膜润滑的滑动轴承,由于在轧制过程中轧制速度的变化较大,由此产生动压轴承的膜厚变化,这必然对板厚精度产生影响。本文采用有限元方法求解雷诺方程,对形成动压润滑的临界轧速以及影响板厚精度的轧速与油膜厚度的关系进行计算机数值模拟,以评价不同轧制工况下油膜轴承的承载特性参数。计算得出不同轧制工况下板厚变化预报公式,实现了更为精确的计算机板厚控制。

The full film lubricated journal bea ring was widely used in plate and strip mill .Due to the variation of rolling speed the film thickness of j ournal changed and the accuracy of gauge was affected accordingly.The finite element method(FEM)was used to solve the Reynolds equation and to perform the computer numerical simulation for the oil film thickness,which inf luenced the gauge control accuracy,and for the critical rolling speed to sustain hydrodynamic lubrication in order t o evaluate the parameters and loadin g capacity of the oil film bearing und er different rolling conditions.The f orecasted formula of film thickness from the computation was obtained an d the more accurate computerized gauge contro l was realized.