数值研究槽深对单螺杆螺筒挤出机性能的影响

Numerical Study on the Influence of Groove Depth in the Performance of Single Screw Extruder with Helically Grooved Barrel

通过数值模拟技术,研究了机筒内壁开螺槽的螺筒结构形成单螺杆螺筒挤出机的性能。使用POLYFLOW软件,数值模拟了硬质聚氯乙烯(PVC-R)熔体在不同螺筒槽深的单螺杆螺筒挤出机中的三维等温流场及混合过程;重点研究了螺筒深度对单螺杆螺筒挤出机的影响。研究表明:在螺筒与螺杆之间间隙不变的情况下,大的螺筒槽深更有利于单螺杆螺筒挤出机混合性能的提高。

Numerical simulation was used to study the helical grooved structure in inner wall of traditional extruder barrel which formed the single extruder with helical grooved barrel. POLYFLOW software was used to calculate the 3D isothermal flow fields and mixing process of PVC-R in the single screw extruder with helical grooved barrel. The influence of groove depth in the single screw extruder with helically grooved barrel was mainly studied. Results showed that, when the gaps between screw and barrel were kept the same, it benefited mixing with bigger groove depth of the helically grooved barrel.