机电工程技术2026，Vol.55Issue(6)：21-28,8.DOI:10.3969/j.issn.1009-9492.2026.06.004
差速双螺杆捏合块液滴分散行为的可视化实验研究
Visualized Experimental Study on the Dispersion Behavior of Droplets in Differential Twin Screw Kneading Blocks
摘要
Abstract
The droplet dispersion behavior in differential twin screw kneading blocks is investigated through visualized experimental methods.A self-designed visualized extrusion platform and high-depth microscopy imaging technology are employed to analyze the effects of different rotational speeds on droplet dispersion.Using a sodium carboxymethyl cellulose(CMC-Na)base fluid system under a differential speed ratio of 2∶1(high-speed group:120-60 r/min,low-speed group:90-45 r/min),image processing algorithms are applied to quantitatively characterize macroscopic parameters including droplet area and major/minor axis lengths.Microscopic fragmentation morphology is observed via the RH-2000 high-depth microscope.Experimental results demonstrate that under high-speed conditions,the average droplet area decreased by 16.3%,area variance reduced by 29.2%,average major axis length shortened by 10.7%,and major axis variance declined by 23.1%.Microscopic observations revealed asymmetric stretching,secondary folding,and chain-like fragmentation patterns in high-speed conditions,with rough fracture interfaces and significantly smaller fragments.In contrast,low-speed conditions preserved quasi-circular droplet structures exhibiting regular fragmentation.The study confirms that increased rotational speed effectively enhances both dispersion capability and uniformity,providing experimental evidence for optimizing differential twin screw kneading block processes.关键词
差速双螺杆/捏合块/可视化实验/粒径分布/超景深显微成像Key words
differential twin screw/kneading block/visualized experiment/particle size distribution/high-depth microscopy imaging分类
化学化工引用本文复制引用
关志远,徐百平..差速双螺杆捏合块液滴分散行为的可视化实验研究[J].机电工程技术,2026,55(6):21-28,8.基金项目
广东省重点建设学科科研能力提升项目(2021ZDJS096) （2021ZDJS096）
