中国塑料 ›› 2025, Vol. 39 ›› Issue (5): 101-106.DOI: 10.19491/j.issn.1001-9278.2025.05.016

• 机械与模具 • 上一篇    下一篇

平行差速三螺杆挤出机流体混合特性研究

秦晓宇1, 朱向哲1(), 陈博涵2, 王宇宇1   

  1. 1.辽宁石油化工大学机械工程学院,抚顺 113001
    2.中国石油天然气股份有限公司大庆石化分公司炼油储运部,大庆 163000
  • 收稿日期:2024-07-01 出版日期:2025-05-26 发布日期:2025-05-22
  • 通讯作者: 朱向哲(1974—),男,教授,从事聚合物加工数值模拟研究,xzzhu@126.com
    E-mail:xzzhu@126.com
  • 基金资助:
    国家自然科学基金(5197031333)

Study on fluid mixing characteristics of parallel differential three⁃screw extruder

QIN Xiaoyu1, ZHU Xiangzhe1(), CHEN Bohan2, WANG Yuyu1   

  1. 1.School of Mechanical Engineering,Liaoning Shihua University,Fushun 113001
    2.Department of Oil Refining,Storage and Transportation,Daqing Petrochemical Branch,PetroChina,Daqing 163000,China
  • Received:2024-07-01 Online:2025-05-26 Published:2025-05-22
  • Contact: ZHU Xiangzhe E-mail:xzzhu@126.com

摘要:

设计了一种转速比为1/5/5的平行排列三螺杆挤出机,该三螺杆挤出机具有几何结构的特殊性以及转速不同。为了研究平行差速三螺杆挤出机独特的流场特性,将其与转速比为1/1/5的平行差速三螺杆挤出机以及转速比为1/5的差速双螺杆挤出机进行对比。结果表明,与传统螺杆相比,由于结构的特殊性以及转速的不同,平行差速三螺杆挤出机发现了独特的复杂粒子轨迹并且啮合区周向速度场出现“二次流”现象,使得流道中物料出现往复运动,物料在流道中的停留时间增加,有利于物料的混合。在计算3组平行差速螺杆挤出机的混合性能相关参数时发现,转速比为1/5/5的平行差速三螺杆挤出机的混合性能较好。

关键词: 平行差速三螺杆, 流体混合特性, 分散混合, 分布混合

Abstract:

In this paper, a parallel differential tri⁃screw extruder with a speed ratio of 1/5/5 was designed. This tri⁃screw extruder has a geometric structure and asymmetry of rotational speed. To explore the unique flow field characteristics, the designed tri⁃screw extruder was compared with the parallel differential tri⁃screw extruder with a speed ratio of 1/1/5 and the differential twin⁃screw extruder with a speed ratio of 1/5. The results indicated that, compared to the traditional extruders, the parallel differential tri⁃screw extruder exhibited a unique complex particle trajectory along with the appearance of a phenomenon of "secondary flow" shown by a circumferential velocity field in the meshing zone appears due to the particularity of the structure and the different speeds. This makes the material in the runner reciprocate together with an increase in the residence time of the material in the runner. These results were conducive to the mixing of materials. When calculating the mixing performance parameters of three sets of parallel differential screw extruders, the parallel differential tri⁃screw extruder with a speed ratio of 1/5/5 were found to have better mixing performance.

Key words: parallel differential tri?screw, fluid mixing characteristics, dispersion mixing, distribution mixing

中图分类号: