高性能玻璃纤维拉丝过程数值研究  

Numerical Study on Drawing Process of High Performance Glass Fiber

作　　者：李会平[1] LI Huiping(Department of Inorganic Materials,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学无机材料系,上海200237

出　　处：《玻璃搪瓷与眼镜》2024年第12期12-19,共8页Glass Enamel & Ophthalmic Optics

摘　　要：分析玻璃纤维拉丝过程对了解高性能玻璃纤维工艺特性和调控纤维制品质量具有重要意义。基于流体力学和传热学原理,建立了纤维拉丝工艺特性的准二维数学模型,并采用数值方法进行求解。利用该模型和计算方法,对无硼无碱高性能玻璃纤维进行模拟计算,探讨了无硼无碱高性能玻璃纤维表面张力的作用,并研究了漏嘴尺寸、温度、拉丝速度等参数对拉制纤维的尺寸、速度和温度的影响。结果表明,表面张力主要影响拉丝初期的半径和速度,对拉丝后期特性影响较小。在保持玻璃液流量和拉丝速度不变时,漏嘴温度越低,初期的纤维越细,速度越快;保持拉丝速度不变时,漏嘴尺寸越小,制备的纤维越细,初期纤维速度增大;当漏嘴尺寸、温度和流量保持不变时,拉丝速度越大,纤维的温度越低,纤维的速度越大,制备的纤维越细。拉丝速度对高性能纤维拉丝行为有重要影响,随拉丝速度增大,最终制备的纤维越细,但当拉丝速度达50 m/s时,纤维直径不再明显变化,维持在2μm左右。从工艺和生产效益角度考虑,拉丝速度不宜超过100 m/s.Analysis of the drawing process is very important for understanding the drawing behavior of the high performance glass fiber and adjusting the quality of fiber products.A simple quasi-2D mathematical model was established to describe the characteristics of fiber drawing process by applying the principles of fluid dynamics,heat transfer and solved numerically.The above model and calculation method were applied to simulate and calculate boron-free and alkali-free high-performance glass fibers,and to discuss the role of surface tension in drawing process.The effects of the tip radius and temperature and the winder velocity on the fiber size,temperature and velocity were studied.Results showed that surface tension mainly affects the velocity and radius of the fiber in the early stage of drawing process and has little effect on the later stage.When keeping the glass liquid flow rate and drawing speed constant,the lower tip temperature,the thinner the fiber and the faster velocity of fiber in the early stage.When keeping the winder velocity unchanged,the smaller tip radius,the thinner radius of fiber,the faster velocity of fiber.Winder velocity had influential effected on the temperature,velocity and radius of the fiber.When the tip radius,temperature,and flow rate remain unchanged,the faster the winder velocity,the lower the fiber temperature,the thinner the fiber and the faster fiber velocity.With the increasing of winder velocity the final fiber radius decreased.When the winder velocity reaches 50 m/s,the final fiber radius decreased slowly,with the fiber radius of about 2μm.From the point of technical and production efficiency the winder velocity should be controlled under 100 m/s.

关 键 词：拉丝行为 拉丝工艺 数学模型 模拟计算 高性能纤维 

分 类 号：TQ171.77[化学工程—玻璃工业]