同向双螺杆挤出机充满度与分散混合关系的研究  

Study of the Relationship between Degree of Fill and Dispersive Mixing for a Co-rotating Twin-screw Extruder

作　　者：揭旭彰 喻慧文 董沛洲 王志群 靳洪胜 Jie Xuzhang;Yu Huiwen;Dong Peizhou;Wang Zhiqun;Jin Hongsheng(Jiangmen Key Laboratory of Intelligent Manufacturing of Polymer Materials,Wuyi University,Jiangmen,Guangdong 529020,China;School of Mechanical and Automation Engineering,Wuyi University,Jiangmen,Guangdong 529020,China;Shenzhen Saifang Technology Co.,Ltd.,Shenzhen,Guangdong 518000,China)

机构地区：[1]五邑大学江门市高分子材料智能制造重点实验室,广东江门529020 [2]五邑大学机械与自动化工程学院,广东江门529020 [3]深圳市塞防科技有限公司,广东深圳518000

出　　处：《机电工程技术》2024年第11期56-59,共4页Mechanical & Electrical Engineering Technology

基　　金：国家自然科学基金资助项目(12102306);广东省教育厅重点领域专项项目(2023ZDZX3039)。

摘　　要：充满度在双螺杆挤出机领域用于表征物料在流道内的占有比例,占有比例的变化会影响机筒内部的速度场、压力场和停留时间。在同向双螺杆挤出机的工作过程中,机筒内部的充满度高低会影响混合能力从而导致成品质量有所偏差。另一方面,近年来充满度的测量方法虽然已经有了相关研究,但目前并没有对同向双螺杆挤出机在不同工况下充满度的预测模型,充满度对双螺杆混合效果的影响的相关研究也较少。为此,以常温的羧甲基纤维素钠(CMC-Na)流体作为实验用流体,在自研同向旋转双螺杆挤出设备上进行实验,实验得到螺杆转速、喂料速度和充满度的对应关系,建立起一种同向双螺杆挤出机充满度的预测模型。根据预测模型,进行实验探究充满度对双螺杆分散混合能力的影响,实验结果表明,双螺杆挤出机在充满度为0.4~0.6之间分散混合能力较为优异。In the field of twin-screw extruders,the degree of fill is used to characterize the occupancy of the material in the flow channel.The level of occupancy affects the proportion of the gas-liquid boundary in the flow channel,which in turn affects the velocity field,the pressure field and the residence time inside the barrel.In the working process of a coaxial twin-screw extruder,the degree of filling inside the barrel affects the mixing capacity,which leads to deviations in the quality of the finished product.On the other hand,although the degree of fill measurement method has been studied in recent years,there is no prediction model for the degree of fill of an co-rotating twin-screw extruder under different working conditions.For this reason,carboxymethyl cellulose sodium(CMC-Na)fluid at room temperature is used as the fluid for experiments.Experiments to obtain the relationship model of screw speed,feed rate and degree of fill are carried out on a self-developed experimental co-rotating twin-screw extruder.The corresponding relationship between screw speed,feed rate and degree of fill is obtained through experiments.And an prediction model for degree of fill of a co-rotating twin-screw extruder is established.According to the prediction model,experiments for the effect of degree of fill on the dispersive mixing of a co-rotating twin-screw extruder are carried out.The experimental results show that the dispersive mixing ability of a co-rotating twin-screw extruder is better when the degree of fill is between 0.4 to 0.6.

关 键 词：同向双螺杆挤出机 充满度 螺杆转速 喂料速度 分散混合 

分 类 号：TQ320.52[化学工程—合成树脂塑料工业]