Air Film Thickness Estimation in Web Handling Processes
Air Film Thickness Estimation in Web Handling Processes
复制标题
卷材处理过程中的气膜厚度估算
DOI：
10.1115/1.2833810
复制
发表时间：
1999
影响因子：
2.5
通讯作者：
H. Hashimoto
中科院分区：
文献类型：
--
作者：
H. Hashimoto
为了估算运动纸幅与导辊之间的气膜厚度（纸幅间距），基于有限宽度可压缩箔片轴承理论，推导了气膜厚度计算公式。在气膜厚度计算公式的推导过程中，采用有限差分法对二维雷诺方程和翼型平衡方程进行离散，并进行迭代求解，得到了不同参数下的压力分布和气膜厚度分布，在此基础上，得到了计算腹板与导辊间气膜厚度的简便公式。另一方面，采用光学传感器测量了纸幅与导辊之间的气膜厚度，并将实验结果与计算结果进行了比较。而且。利用推导出的气膜厚度公式，分析了卷筒纸卷绕过程中两层间气膜厚度的变化规律。从理论和实验结果，空气膜厚度的影响，对纸幅输送系统进行了澄清。
In this paper, in order to estimate an air film thickness between moving web and guide roller (web spacing height), an air film thickness formula was derived based on the finite width compressible foil bearing theory. In the derivation of the air film thickness formula, the two-dimensional Reynolds equation and foil equilibrium equation were discretized by the finite difference method and solved iteratively to obtain the pressure and air film thickness distributions for various parameters, Based on the numerical results, the simplified convenience formula for the estimation of air film thickness between web and guide roller was obtained. On the other hand, the air film thickness between web and guide roller was measured by an optical sensor, and the experimental results were compared with the calculated results. Moreover. the variation of air film thickness between two layers in web winding processes was analyzed by making use of the air film thickness formula derived above. From the theoretical and experimental results obtained, the effects of air film thickness on the web transporting systems were clarified.