啮合同向双螺杆挤出机结构参数对混合关键参量的影响

doi:10.12382/bgxb.2021.0495

摘要/Abstract

摘要： 为探究双螺杆结构参数对混合过程关键参量的影响，研究啮合同向双螺杆挤出机的 8个结构参数对混合过程6种关键参量（温度峰值、压力峰值、黏性耗散、混合指数、平均停留时间、扭矩结果）的影响规律。采用正交试验设计双螺杆挤出机不同结构参数组合的试验方案，在混合过程中分别建立不同结构参数组合对于6种关键参量影响的预测数学模型，使用同向双螺杆挤出软件Ludovic对建立的预测数学模型进行求解计算，通过统计产品与服务解决方案(SPSS)软件对计算结果进行分析。结果表明：1）温度峰值随反向螺纹元件导程的增加而升高，随正向螺纹元件导程1的增加而降低；2）与反向捏合块相比，反向螺纹元件可以建立更大的压力。在实际工程中，一般将反向螺纹元件或反向捏合块放置在螺杆排气段前，建立一定的真空度；3）随螺杆元件中加入反向螺纹元件、反向捏合块元件会导致螺杆填充度增加，黏性耗散增大；4）混合指数随着正向捏合块导程和反向螺纹元件导程增加而增大；5）反向螺纹元件和捏合块可以延长物料在双螺杆中的停留时间；6）扭矩的极显著影响因素：正向螺纹元件导程2和反向螺纹元件导程。

关键词: 双螺杆挤出机, 结构参数, 混合过程, 影响规律, 混合关键参量

Abstract: The influence of twin-screw structural parameters on key mixing parameters has been investigated through the analysis of how eight structural parameters of an intermeshing co-rotating twin-screw extruder affect six key mixing parameters (peak temperature，peak pressure, viscosity dissipation, mixing index, average residence time, and torque results). Orthogonal experiments are chosen as the experimental scheme for the twin-screw extruder. Prediction models for the influence of different structural parameters on the six mixing parameters are established. The co-rotating twin-screw extrusion software Ludovic is used to derive models for calculation, and the calculation results are analyzed using Statistical Product and Service Solutions (SPSS). The results show that: (1) The peak temperature increases with the increase of the lead of the reverse threaded element and decreases with the increase of the lead 1 of the forward threaded element. (2) Compared with a reverse kneading block, a reverse thread element can build up more pressure. In actual engineering, a reverse screw element or reverse kneading block is typically placed in front of the screw exhaust section to create a vacuum. (3)With the addition of reverse thread elements and reverse kneading block elements to the screw, the screw's filling degree and viscosity dissipation will increase. (4) The mixing index increases as the lead of the forward kneading block and the lead of the reverse screw element increase. (5)The reverse screw element and kneading block can extend the residence time of the material in the twin screw. (6) Highly significant factors that influence the torque are forward threaded element lead 2 and reverse threaded element lead.

Key words: twin-screwextruder, structuralparameters, mixingprocess, lawofinfluence, keymixingparameters

中图分类号:

TQ32

李成，薛晓俊，胡建树，尹艳华. 啮合同向双螺杆挤出机结构参数对混合关键参量的影响[J]. 兵工学报, 2022, 43(10): 2640-2648.

LI Cheng, XUE Xiaojun, HU Jianshu, YIN Yanhua. Effects of Structural Parameters of Intermeshing Co-Rotating Twin Screw Extruders on Key Mixing Parameters[J]. Acta Armamentarii, 2022, 43(10): 2640-2648.

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