基于EDEM的行星式混凝土搅拌机关键结构优化设计

Key Structure Optimization Design of Planetary Concrete Mixer Based on EDEM

摘要: 行星式混凝土搅拌机已在市场得到广泛应用，其搅拌臂结构形状直接影响到混凝土的搅拌质量和效率。为了优化其结构，提高搅拌效率，以某公司生产的行星式混凝土搅拌机结构为参考，使用离散元软件EDEM模拟物料搅拌流动状态并分析物料搅拌均匀度，发现搅拌缸侧壁处的物料存在运动形式单一、局部搅拌不均匀的现象。针对这一现象，通过修改搅拌机边刮臂的形状和结构尺寸，再次仿真结果表明结构优化后的搅拌机对混凝土搅拌质量具有明显提升。

Abstract: Planetary concrete mixers have been widely used due to their high mixing efficiency, and their structure directly affects the mixing quality and efficiency of concrete. In order to optimize its structure, the stirring efficiency is improved. Taking the structure of the planetary concrete mixer produced by a company as a reference, the discrete element software EDEM was used to simulate material agitation, and the flow state of the material and the uniformity of material mixing were observed. It is found that the material movement at the sidewall of the mixing tank during the mixing process is single, and local agitation is uneven. For this phenomenon, after the shape of the scraper arm of the mixer is changed from plane to circular surface, the simulation process is re-peated. It shows that the overall mixing uniformity of the mixer after structural optimization has a significant improvement.