单螺杆挤出的进料均匀性分析及其结构优化设计  

Feed Uniformity Analysis and Structure Optimization Design of Single Screw Extrusion

作　　者：朱玉珩 黄瑶 邹鲲[1] 陈入领[1] 彭倚天 ZHU Yu-heng;HUANG Yao;ZOU Kun;CHEN Ru-ling;PENG Yi-tian(School of Mechanical Engineering,Donghua University,Shanghai 201600,China;Engineering Research Center of Ministry of Education of Textile Equipment,Shanghai 201600,China)

机构地区：[1]东华大学机械工程学院,上海201600 [2]纺织装备教育部工程研究中心,上海201600

出　　处：《塑料工业》2022年第2期80-86,共7页China Plastics Industry

基　　金：国家自然科学基金资助(51905089);上海市自然科学基金(19ZR1401500);中央高校基本科研业务费专项资金资助(2232020D-31)。

摘　　要：螺杆挤出设备因其自身结构简单、设备能耗低等优点,在橡胶塑料、纤维成型等领域被广泛使用。但实际生产中螺杆的进口总会出现进料不均匀、不连续的情况。因此,采用Fluent软件对单螺杆挤出机中聚合物的三维等温流场进行数值模拟,探究了均匀进料和不均匀进料对聚合物流场的影响,并针对不均匀进料的不良影响,对螺杆的导程和螺棱间隙进行优化改进。研究结果表明,进料的不均匀性会增大物料反应过程中的死区占比和停留时间,同时出口流量的稳定性也会遭到破坏,而适当增大螺杆导程和螺棱间隙可有效改善以上问题,加强挤出螺杆的轴向输送能力,提升产品的生产质量。The screw extruder was widely used in the field of rubber plastics,fiber molding due to its own high structure,low equipment energy consumption.However,due to the instability characteristics of the raw material,the fuel uniformity of the screw always had some inconsistencies.Therefore,the three-dimensional isothermal flow field of the polymer in a single screw extruder was numerically simulated using the Fluent software.The impact of uniform feed and uneven feed on fiber melt flow field and gelatin mass was explored,and improvements to the leading screws and screw gaps for uneven feed were optimized.The results show that the non-uniformity of the feed increases the comparison and residence time during the material reaction process,and the stability of the export flow could also be destroyed.Appropriately increasing the screw lead and screw edge clearance could effectively improve the above problems,strengthen the axial conveying capacity of extrusion screw and improve the production quality of products.

关 键 词：进料均匀性 螺杆导程 螺杆间隙 输送性能 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]