基于CFX新型变速双螺杆的优化设计与流场分析  

Optimized Design and Flow Field Analysis Based on CFX

作　　者：王梦杰 王丽艳[1] 郭树国[1] 朱骄阳[1] WANG Mengjie;WANG Liyan;GUO Shuguo;ZHU Jiaoyang(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang,Liaoning 110142,China)

机构地区：[1]沈阳化工大学,机械与动力工程学院,辽宁沈阳110142

出　　处：《塑料》2025年第1期75-80,共6页Plastics

基　　金：辽宁省自然科学基金(2022-MS-288)。

摘　　要：结合木塑材料在传统双螺杆挤出机中混合效果较差的问题,设计了一种磁性轮变速双螺杆挤出机,提高其在螺杆流道内的混合性能。基于有限元体积分析,采用三维建模软件SolidWorks建立几何模型,利用ANSYS/CFX模拟软件,分析木塑材料在流道流场中的运动情况,通过分析其宏观压力场、速度矢量与速度流线,并与传统双螺杆进行对比可知,传统双螺杆与新型双螺杆出入口压差分别为285.5、105.8 MPa,传统双螺杆建压能力为新型双螺杆的2.70倍,降低了新型双螺杆的物料输送速度,传统双螺杆的均速与最大速度分别为0.33、0.43 m/s,新型双螺杆为0.19、0.34 m/s,停留时间为传统双螺杆的1.26~1.74倍,混合性能得到提升。研究结果表明,磁性轮变速双螺杆变速段的速度显著降低,提升了木塑材料在流道内13%~17%的停留时间,木塑材料在流道内被反复剪切,混合性能得到显著提升。For the problem of low mixing effect in traditional twin screw extruder,a magnetic wheel variable speed twin screw extruder was designed to improve the mixing performance in the screw flow channel.Based on the finite element volume analysis,the 3 D modeling software SolidWorks was selected to establish the geometric model,and the ANSYS/CFX simulation analysis software was used to analyze the movement of wood-plastic materials in the flow field,according to the macroscopic pressure field,velocity vector and velocity streamline analysis,and compared with the traditional double screw.The analysis results showed that the inlet pressure difference between the traditional twin screw and the new twin screw was 285.5,105.8 MPa respectively,the construction pressure capacity of the traditional twin screw was 2.70 times that of the new twin screw,which reduced the material conveying speed of the new twin screw,the average speed and the maximum speed of the traditional twin screw were 0.33 and 0.43 m/s respectively,the new twin screw was 0.19 and 0.34 m/s,the residence time was 1.26~1.74 times that of the traditional twin screw,and the mixing performance was improved.The results showed that the variable speed section of the magnetic wheel was significantly reduced,which improved the residence time of the wood-plastic material in the flow channel by 13%~17%,and the wood-plastic material was repeatedly cut in the flow channel,and the mixing performance was significantly improved.

关 键 词：双螺杆 变速轮 木塑材料 混合性能 流场分析 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术] TQ320.66[自动化与计算机技术—计算机科学与技术]