| 振动力场作用下的单螺杆挤出机固体输送理论 |
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| 引用本文： | 石宝山,瞿金平,何和智,冯彦洪.振动力场作用下的单螺杆挤出机固体输送理论[J].化工学报,2006,57(11):2568-2576. |
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| 作者姓名： | 石宝山 瞿金平 何和智 冯彦洪 |
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| 作者单位： | 华南理工大学聚合物新型成型装备国家工程研究中心, 聚合物成型加工工程教育部重点实验室，广东 广州 510641 ; |
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| 摘 要： | 在单螺杆挤出机中，通过螺杆的轴向振动将振动力场引入聚合物固体输送过程，提出振动力场强化固体输送过程的新概念.以螺槽中运动的物料为对象建立了振动力场强化固体输送过程的数学模型，并获得了物料沿螺槽方向输送的压力（密度）、速度的近似解析解.传统固体输送过程就是当螺杆轴向振动的振幅为零时的特例，此时的压力降与Darnell and Mol 理论一致，但不同的是物料速度及密度沿螺槽方向是变化的，从而修正了Darnell and Mol 固体输送理论.螺杆的轴向振动提高了固体输送平均压力，缩短了固体输送的长度，增加了固体输送角.透明料筒全程可视化实验挤出机证明了螺杆轴向振动确实缩短了物料固体压实输送所需的螺槽长度.
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| 关 键 词： | 单螺杆挤出机 振动力场 固体输送 |
| 文章编号： | 0438-1157（2006）11-2568-09 |
| 收稿时间： | 09 29 2005 12:00AM |
| 修稿时间： | 2005-09-292005-12-31 |
Solids conveying theory of single-screw extrusion under vibration force field |
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| SHI Baoshan,QU Jinping,HE Hezhi,FENG Yanhong.Solids conveying theory of single-screw extrusion under vibration force field[J].Journal of Chemical Industry and Engineering(China),2006,57(11):2568-2576. |
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| Authors: | SHI Baoshan QU Jinping HE Hezhi FENG Yanhong |
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| Affiliation: | State Engineering Research Center of Novel Equipment for Polymer Processing, Key Laboratory of Polymer Processing Engineering, Ministry of Education, South China University of Technology, Guangzhou 510641, Guangdong, China |
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| Abstract: | In the single-screw extruder a vibration force field was applied to the solids conveying process by the axial vibration of the screw and a novel concept of the solids conveying process being strengthened with the vibration force field was brought forward. A mathematical model that described the solids conveying process with the vibration force field was established and the approximate analytical solutions of the pressure and velocity of the solids conveying along the screw channel were obtained. When the amplitude of the axial vibration of the screw was zero, the new solids conveying theory presented in this paper could describe the conventional solids conveying process, namely, the conventional solids conveying process was the special case of the one being strengthened with the vibration force field. In the new theory, if the screw has no axial vibration the solids conveying pressure is the same as that of the Darnell and Mol theory, but the density and velocity of solids conveying along the screw channel are variable, which has modified the Darnell and Mol theory in which the density and velocity of the solids conveying along the screw channel are considered invariable. The theoretical results reveal that the axial vibration of the screw can increase the average pressure of solids conveying, decrease the channel length of the solids conveying section and increase the solids conveying angle. In the self-developed experimental extruder with transparent barrel, the successive visualization experimental results proved that the axial vibration of the screw indeed shortened the channel length needed for solids compressing and conveying. |
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| Keywords: | single screw extruder vibration force field solids conveying zone |
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