摘要
铝箔涂层线水冷辊容易导致亲水铝箔产生"起皱"问题,其原因为使用完全水冷导致冷却速度过快,无法满足铝箔工艺要求。文中使用流体商用软件Fluent计算了铝箔冷却过程温度场,给出了流场温度分布及量化值比较。在此基础上,首先探讨了通过加置空气隔层改善铝箔"起皱"问题的可行性,并给出了空气隔层厚度对铝箔冷却过程的影响规律,其次探讨了水冷辊直径、包角、旋转速度等主要参数对冷却过程的影响规律并拟合出相应曲线。结果表明:添加空气隔层可有效降低铝箔冷却速度,随着空气隔层厚度的增加,空气隔温效果增加,隔层设置为4~6 cm可满足铝箔生产工艺要求;铝箔冷却温度与水冷辊直径、包角呈线性关系,与水冷辊旋转速度呈反比关系。
The aluminum-foil coating line water-cooling roller is likely to suffer "crease"of hydrophilic aluminum foil. The reason is that the use of complete water cooling causes the cooling speed to be too fast to meet the processing requirements of aluminum foil. In this article,the fluid commercial software Fluent is adopted to calculate the temperature field of the aluminum foil in the process of cooling,and both the temperature distribution of the flow field and the comparative quantified values are identified. On this basis,firstly,the analysis is conducted on both the feasibility of"crease"reduction by adding an air barrier and the influence of the air barrier’s thickness on the cooling process of aluminum foil;secondly,the influence of main parameters such as diameter,wrap angle,and rotation speed on the cooling process is worked out and the corresponding curve is obtained. The numerical results show that thanks to the air barrier,the cooling speed of aluminum foil reduces greatly. As the air barrier’s thickness increases,the air enjoys a desirable effect of temperature insulation. The 4 ~ 6 cm barrier meets the processing requirements of aluminum foil. The cooling temperature of aluminum foil is in a linear relationship with the water-cooling roller’s diameter and wrap angle;it is inversely proportional to the rotation speed of the water-cooling roller.
作者
李会荣
刘跃
管小荣
LI Hui-rong;LIU Yue;GUAN Xiao-rong(School of Mechanical Engineering,Shaanxi Institute of Technology,Xi’an 710300;School of Mechanical Engineering,Nanjing University of Technology,Nanjing 210094)
出处
《机械设计》
CSCD
北大核心
2021年第5期99-103,共5页
Journal of Machine Design
基金
陕西省自然科学基金资助项目(2021JQ-898)
2019年度陕西高等教育教学改革重点研究项目(19GZ012)。
关键词
水冷辊
结构优化
流固耦合
FLUENT
数值模拟
water-cooling roller
structural optimization
fluid-solid coupling
Fluent
numerical simulation
