Abstract: 4WS, 4WH and 6WI rotors were regarded as the object of study. According to the theory of fluidstructure interaction, fluid solid coupled finite element analysis models of internal mixer were established, and the coupled equations of liquid material and solid rotor inside internal mixer were solved. Under the circumstance of constant power, the influence rules of the stress and deformation of rotor under rotate speed were researched. It was found that the stress and deformation were leaded by the coupling of torque and fluid load , and the torque was the main factor resulting in stress and deformation. With the increase of rotate speed, the mixing effect of materials was significantly improved. The torque caused by rotate speed and the change of fluid load leaded to the change of rotor clearance. Rotor clearance had significant influence on the mixing effect. 6WI rotor had better mixing effect. The research results provided theoretical reference for the reasonable design and performance prediction of rotor in internal mixer.

Key words: Internal mixer, Workbench, Fluidstructure interaction, Numerical modeling

摘要： 以4WS、4WH 和6WI型转子为研究对象,依据流固耦合理论,建立密炼机流固耦合有限元分析模型,求解密炼机内部物料流体与转子固体的耦合方程,研究不恒定功率情况下,转速对转子的应力与变形以及混合效果的影响规律。结果表明,转子的变形与应力是扭矩与流体载荷耦合作用引起的,其中扭矩是产生变形与应力的主要因素;随着转速的提高,物料的混合效率有明显提高;随着转速变化引起的扭矩与流体载荷的变化导致转子间隙的变化,转子间隙对混合效率有显著影响,6WI转子有更高的混合效率。研究结果为密炼机转子的合理设计与性能预测提供了理论依据。

关键词: 密炼机, Workbench, 流固耦合, 数值模拟