基于液压比例阀的卷纸机控制方法

对改进后卷纸机的机械结构、液压加压过程进行了分析并建立了数学模型,以便用PLC对在卷的纸卷进行恒线压控制。通过在初级臂、次级臂转动处各安装上角位移传感器以分别获得一个角度值,再将此角度值信号输入到PLC,PLC依据数学模型进行运算,给比例减压阀一个控制信号,分别控制支承油缸的压力值、次级臂油缸有杆腔的压力值,使之随动变化,使得卷纸辊线压力恒定不变,以确保卷纸不起皱,保证卷纸质量。

Control Method for Paper Reeling Machine Based on Hydraulic Proportional Valve

This paper analyzed the mechanical structure of an improved paper reeler and hydraulic pressing process. The mathematical model was established in order to use PLC controlling paper roll with constant linear pressure in the reeling process. Angle values were measured by angular displacement sensors which were installed on the rotating positions of primary arm and secondary arm, respectively. Then the angle value signals were input to the PLC and processed based on the mathematical model, the control signals were sent to the proportional valves. The support cylinder pressure value and the pressure value of the chamber with rod in secondary arm cylinder were controlled accordingly. This method made the paper reel pressure constant therefore to ensure the paper quality without wrinkling.