Abstract:

The effect of kneading clearance on the mixing performance of vertical kneading mixers was investigated by using the CFD methodsFirstly，the mixing field in the kneading tank was simulated numerically after analyzing the movement of mixer blade and the rheological properties of the materialNext，some macro mixing performance evaluation indices of the device were proposedLastly，the effect of kneading clearance on mixing performance was studiedThe results indicated that a small kneading clearance could improve the mixing performance of vertical kneading mixers and better kneading efficiency could be achieved with a uniform kneading clearance.

摘要： 本文利用计算流体力学(CFD)方法研究捏合间隙对立式捏合机混合性能的影响。首先，根据立式捏合机搅拌桨叶运动特点以及被混物料的流变特性，进行立式捏合机混合流场数值模拟。其次，确定立式捏合机混合性能宏观评价指标。最后，分析了捏合间隙的变化对混合性能评价指标的影响。分析结果表明：间隙越小，立式捏合机的混合性能越好；当空心桨叶两侧的捏合间隙大小相等时，立式捏合机的功耗最小。