基于Archard模型与DEM仿真的高压辊磨机磨损演化规律研究与优化

Research and Optimization of Wear Evolution Law of High Pressure Roller Mill Based on Archard Model and DEM Simulation

高压辊磨机在破碎物料时,颗粒间的挤压和剪切会引起辊面的磨损。研究结合离散元方法(DEM)与Archard磨损模型,对表面网格进行了划分,并精确模拟了高压辊磨机柱钉的磨损形态。结果表明,磨损模拟结果与实测结果高度一致,即沿磨辊出现碗形磨损,中心区域最严重。对磨辊结构和进料装置的优化表明,在定辊端部增设挡板,可以有效解决柱钉的不均匀磨损和边缘漏料问题,实现了磨损离散系数的降低(下降75%)和挤压区料压的增加(增长28%),提升了辊压机的粉磨效率和柱钉的使用效率。该研究成果为优化传统高压辊磨机提供了思路。

When the high pressure roller mill is crushing the material,the squeeze and shear between the particles will cause the wear of the roller surface.Combined with the discrete element method(DEM)and Archard wear model,the surface mesh was divided,and the wear morphology of the high pressure roller mill stud was simulated accurately.The results showed that the wear simulation results were highly consistent with the measured results,that is,bowl-shaped wear occurred along the grinding roller,and the central area was the most serious.The optimization of the grinding roller structure and the feeding device showed that the addition of a baffle at the end of the fixed roller could effectively solve the problem of uneven wear of the column nail and edge material leakage.The reduction of the wear dispersion coefficient(75%)and the increase of the material pressure in the extrusion zone(28%)were realized,which improved the grinding efficiency of the high pressure roller mill and the use efficiency of the studs.The research results provide ideas for optimizing the traditional high pressure roller mill.