环模制粒挤压过程力学建模及影响因素分析

该文旨在通过研究环模制粒机挤压过程受力状况为其节能降耗及优化设计提供一定的参考。根据环模制粒机制粒成形过程与机理的分析和对环模系统受力状况的研究，建立了环模扭矩力学模型，推导出最大物料挤压高度及最大环模扭矩的计算公式；以力学模型为基础，分析了泊松比、摩擦系数等物料特性及环模、压辊系统的结构参数对环模扭矩的影响规律。研究结果表明，物料特性对制粒能耗影响很大；在一定范围内减小模孔长径比、减小压辊直径有利于降低能耗；而采用大尺寸的环模与压辊不仅可以提高产量，同时还可以降低能耗。该研究对于降低环模制粒机的能耗具有重要意义，并可为相关的试验提供理论依据。

Modeling and analysis on extruding force in pelleting process

Purpose of the study was to provide a basis for reducing power dissipation, optimizing structural design and properly using the pellet mill in practice by force analysis in pelleting process. According to the analyses on the forming mechanism of the pellet mill and the researches on the working condition of the ring die, the maximum extruding height of the material and the maximum torque model were developed. Based on the models, the influences of the material properties and structure parameters on the torque were discussed. The research shows that the material properties have great effects on the energy consumption in pelletizing. It is favorable to use small roller and small length-diameter ratio of the die hole in certain range for lowering energy consumption. And larger pellet mill can increase production yield and reduce energy consumption. The results are significantly meaningful for reducing consumption of the pellet mill, and can provide reliable theoretical basis for some experiments.