往复式单螺杆销钉挤出机典型螺纹元件混合性能研究

doi:10.19491/j.issn.1001-9278.2008.01.019

中国塑料 ›› 2008, Vol. 22 ›› Issue (1): 90-95 .DOI: 10.19491/j.issn.1001-9278.2008.01.019

• 机械与模具 • 上一篇

往复式单螺杆销钉挤出机典型螺纹元件混合性能研究

毕超，江波

北京化工大学机电工程学院，北京１０００２９

收稿日期:2007-09-19 修回日期:1900-01-01 出版日期:2008-01-26 发布日期:2008-01-26

Mixing Performances of Typical Screw Elements in Buss Kneader

BI Chao，JIANG Bo

Institute of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029，China

Received:2007-09-19 Revised:1900-01-01 Online:2008-01-26 Published:2008-01-26
Contact: BI Chao

摘要/Abstract

摘要： 使用Polyflow有限元软件对往复式单螺杆销钉挤出机（简称Buss机）的三类典型螺纹元件内物料流动和混合过程进行了数值模拟。流场分析中使用了网格重叠技术。在得到流场速度分布后，基于粒子轨迹跟踪技术计算了物料微元在螺纹元件内的流动轨迹，并分析了Buss机螺纹元件内物料的动态混合过程。以分布混合指数和分隔比例为指标定量地对比了螺纹元件的分布和分散混合性能，在此基础上分析了加工条件、物料特性及销钉布置对Buss机混合性能的影响。数值模拟结果与前人研究有较好的吻合性。

关键词: 往复式单螺杆销钉挤出机, 分布混合, 分散混合

Abstract: In the present study, the flow and mixing characters of the typical screw elements in the reciprocating pin single-screw extruder were studied using a Polyflow finite clement package. Based on the statistical treatment of the flow trajectories for a large number of the mass points which were located at the entrance of the screw clement，the dynamic mixing process was analyzed.Furthermore, the distribution index and the segregation scale were applied to evaluate the distribution mixing and the dispersivc mixing, respectively.At last，the effects of the operating conditions, material viscosity and the pins on the mixing performances of the extruder were also analyzed. Some of the numerical results were com-
pared with previous results.

Key words: reciprocating pin single-screw extruder, distributive mixing, dispersive mixing

毕超, 江波. 往复式单螺杆销钉挤出机典型螺纹元件混合性能研究[J]. 中国塑料, 2008, 22(1): 90-95 .

BI Chao, JIANG Bo. Mixing Performances of Typical Screw Elements in Buss Kneader[J]. China Plastics, 2008, 22(1): 90-95 .

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往复式单螺杆销钉挤出机典型螺纹元件混合性能研究

Mixing Performances of Typical Screw Elements in Buss Kneader

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