摘要
首先研究了啮合区固体输送,得到了啮合区的固体输送率,再通过建立非啮合区的非塞流固体输送物理模型,运用虚功原理得到了固体输送的数学模型。以三层模型为例对非塞流固体输送模型进行了求解,求得螺槽中物料层的平均速度,进而得到非啮合区的固体输送率。通过引入转化系数,将啮合区转化为非啮合区,从而将啮合区和非啮合区的固体输送统一为非塞流输送,并得到了转化后的等效螺槽充满度和固体输送率,建立了三螺杆挤出机的固体输送理论,采用粒料(LDPE)和粉料(PP)进行实验验证所建立的固体输送理论,并对固体输送的影响因素进行了研究。
The intermeshing region was studied first and throughput was obtained. Then physical model of non-plug solid conveying in the non-intermeshing region was established and mathematical model was obtained by the use of virtual work principle. Solid conveying efficiency in the non-intermeshing region was obtained via solving three-layer model of non-plug solid conveying and average velocity of material was gotton. By introducing transformation coefficient, the intermeshing region was turned into non-intermeshing region, thus solid conveying in the intermeshing region and non-intermeshing region was integrated into non-plug solid conveying, equivalent screw channel fill ratio and solid conveying efficiency were obtained. Solid conveying of tri-screw extruder was consisted of these. Some experiments were done with particulate material （LDPE） and powder material （PP） in order to verify solid conveying theory,and the influencing factors of solid conveying were studied.
出处
《塑料》
CAS
CSCD
北大核心
2013年第2期1-5,114,共6页
Plastics
基金
国家支撑计划项目(2009BAI84B05)
国家自然科学基金资助项目(51273068)
关键词
三螺杆挤出机
固体输送理论
正位移输送
非塞流
产量
tri-screw extruder
solid conveying theory
positive displacement conveying
non-plug flow
throughput
