基于ANSYS/CFX渐加速双螺杆设计及三维流场分析  

Design and 3D flow field analysis based on ANSYS/CFX stepwise acceleration twin screw

作　　者：田东 郭树国[1] 王丽艳[1] TIAN Dong;GUO Shu-guo;WANG Li-yan(College 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：《食品与机械》2023年第6期99-104,共6页Food and Machinery

基　　金：辽宁省自然科学基金项目(编号:2022-MS-288,2021-MS-253,2019-ZD-0085)。

摘　　要：目的:提高双螺杆挤出机的混合效率和工作性能。方法:设计了一种内嵌行星轮系和安装捏合块的新型双螺杆挤出机,并用SolidWorks建立三维模型,以有限体积法为基础,用ANSYS/CFS有限元分析软件对其流道进行分析。获得其宏观压力图、速度矢量图、速度流线图并与传统双螺杆挤出机三维流场进行对比。结果:在行星轮系和捏合块的渐加速作用下,渐加速双螺杆挤出机的混合性能和工作效率要明显优于传统双螺杆,经计算渐加速型双螺杆比普通双螺杆提高20%~25%。结论:渐加速双螺杆在不断加速的过程中使得物料在机筒内停留的时间变短,从而提高产量且减少耗能,捏合块的加入更使得物料可以得到更好的剪切。Objective:To improve the mixing efficiency and working performance of the new twin-screw extruder.Methods:A new twin-screw extruder with embedded planetary gear train and kneading block was designed.A three-dimensional model was established by SolidWorks,and the flow field analysis of the flow channel was performed by ANSYS/CFS finite element analysis software based on the finite volume method.The Macroscopic pressure diagram,velocity vector diagram,velocity flow diagram were gotten,which was compared with the traditional twin-screw extruder three-dimensional flow field.Results:Under the gradual action of the planetary gear train and the kneading block,the mixing performance and working efficiency of the stepwise acceleration twin screw extruder were significantly better than those of the traditional twin screw.By calculation,the stepwise accelerated twin screw was 20% ~ 25% higher than the traditional twin screw.Conclusion:In the process of continuous acceleration,the gradual acceleration twin screw makes the residence time of the material in the barrel shorter o increase production and reduce energy consumption,and the addition of kneading block makes the material get better shearing.

关 键 词：双螺杆 ANSYS/CFS 渐加速 流场分析 

分 类 号：TS203[轻工技术与工程—食品科学]