公开(公告)号：US4425489A

公开(公告)日：1984-01-10

申请号：US294742

申请日：1981-08-20

申请人： Josef Pav ,  H. J. Lauschner ,  Peter J. Gaede

发明人： Josef Pav ,  H. J. Lauschner ,  Peter J. Gaede

IPC分类号： B21B27/08 ,  F26B13/18 ,  F26B23/04 ,  H05B6/14

CPC分类号： F26B13/183 ,  F26B23/04 ,  H05B6/145

摘要： A calender roll whose shell consists of ferromagnetic material is heated by several groups of electromagnets which are mounted within the shell on a stationary carrier and whose pole shoes are adjacent to the internal surface of the shell. The temperature of the external surface of the shell is monitored at several locations as considered in the axial direction of the roll, and the resulting signals are compared with reference signals denoting the optimum or desired temperatures at such locations. Signals denoting the differences between the actual temperature signals and desired temperature signals are used to regulate the characteristics of electric current which is supplied to the windings of the electromagnets. Each electromagnet of each group can be regulated independently of all other electromagnets. Alternatively, two or more electromagnets of each group or entire groups of electromagnets may be regulated simultaneously. Additional electromagnets are provided to heat the end portions of the shell. Alternatively, such end portions can be heated by the rotors of electric motors which rotate the shell. The characteristics of current which is supplied to the windings of certain electromagnets can be influenced by signals which denote the magnitude of flexural stresses upon selected portions of the shell so that the corresponding electromagnets oppose deformation of adjacent portions of the shell.

摘要翻译： 其外壳由铁磁材料组成的压光辊由几组电磁体加热，电磁体安装在壳体内的固定载体上，其极靴与壳体的内表面相邻。 在沿着辊的轴向方向考虑的几个位置处监测外壳的外表面的温度，并将所得到的信号与表示在这些位置处的最佳或期望温度的参考信号进行比较。 表示实际温度信号和期望温度信号之间的差异的信号用于调节供应给电磁体绕组的电流特性。 每个组的每个电磁体可以独立于所有其他电磁体进行调节。 或者，可以同时调节每组的两个或更多个电磁体或整组电磁体。 提供附加的电磁体以加热壳体的端部。 或者，这样的端部可以由旋转外壳的电动机的转子加热。 提供给某些电磁体的绕组的电流的特性可以受到表示壳体的选定部分上的弯曲应力的大小的信号的影响，使得相应的电磁体对抗壳体的相邻部分的变形。