螺旋沟槽单螺杆挤出机中固体段压力分布研究  

Pressure Distribution in Solid Section of Helically Grooved Feed Single-screw Extruders

作　　者：潘龙[1] 贾明印[1] 薛平[1] 金志明[1] 唐广利[1] 

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《中国塑料》2011年第4期102-106,共5页China Plastics

基　　金：国家自然科学基金资助项目(50873014)

摘　　要：通过在固体输送段机筒内壁开设螺旋沟槽,同时将嵌入机筒沟槽与螺杆螺槽中的物料视为固体塞,建立了一个机筒与螺杆对物料协同作用的整体系统。充分考虑固体塞运动过程中的可压缩性及其受到的加速度的影响,建立数学模型,进而求解固体塞的压力及速度方程式。结果表明,固体塞在沟槽螺棱与螺杆螺棱的共同推力作用下正位移输送时,系统建压能力被显著提高,在固体输送段末端产生的沿螺杆轴向上的压力峰值有效保证了物料的稳定挤出。In the feeding sleeve several helical grooves were opened up. Regarding the materials between groove and channel as a solid plug, the barrel and screw could be considered as an indivisible system to cooperatively push forward the materials in solid conveying zone. A mathematical model was formulated to consider the influences of the compressibility and the acceleration of the materials, the pressure and the velocity of the solid-plug in the down-channel were calculated. Finally, it was found that when the solid-plug was being carried by way of positive conveying, the peak pressure at the end of solid conveying zone was strikingly promoted and the materials could be stably extruded.

关 键 词：单螺杆挤出机 固体输送 螺旋沟槽 压力分布 双螺棱推动 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]