Performance Analysis And Structure Optimization Of V-mixer By DEM Method

In the industrial production process,the material mixing technology plays a vital role in the preparation of raw materials,as well as the preparation and processing of semi-finished products and finished products.The physical state of the powder material in the space,such as accumulation,mixing,and material layer,directly affects the preparation of raw materials,as well as the physical properties such as density,strength,and air tightness of semi-finished products and finished products.This study aims to carry out numerical simulation research and analysis on the V-type mixer in the material mixing equipment.Firstly,the mixing characteristics of the material particles of the V-type mixer were analyzed,and the regularity of the material particles of the mixing process was found and summarized.Secondly,according to the mixing mechanism of the material particles in the V-type mixer,the structure of the V-type mixer is optimized.Then,the mixing performance of the structurally modified V-type mixer was analyzed to find out the improvement scheme for the material particles of the V-type mixer with superior mixing performance.Finally,by comparing with the improvement scheme in the existing V-type mixer patent,the advantages and disadvantages between the improvement scheme of the existing patent and the optimization scheme of the research are summarized.The final realization provide a certain degree of basis and reference value in the industrial production and processing process.In the process of achieving the above research,firstly,a calculation method of numerical simulation of bulk materials in computer environment is introduced,namely discrete element method(DEM).By using the discrete element method,numerical simulation of the bulk material can be realized.Through the numerical simulation method,the mixing mechanism and characteristics of the material particles can be observed and analyzed during the mixing process.Then,by using the lacey index evaluation method,the mixing degree of the material particles is statistically analyzed and numerically solved.Finally,according to the variation law of mixingdegree,the influence of mixers with different structures on the mixing degree of material particles is summarized.Through this research,it is found that the V-type mixer with different structures has different mixing effects in the process of mixing and processing the same materials.The traditional V-type mixer mainly relies on the asymmetric structure of the V-shaped cylinder,and the material is doped and agitated for the mixing process of the material particles,thereby achieving the mixing effect of two or more materials.Since the V-type mixer uses low-speed rotation of the mixing process,adding a mixing device to the equipment can improve the mixing efficiency of the material particles.In the improved scheme,the mixing device is added along the rotation axis of the V-shaped cylinder,and the mixing effect of the additional mixing device is not perpendicular to the rotation axis of the V-shaped cylinder.Moreover,for this improved method,the two-tube long structure of the V-type mixer can realize the symmetrical structure design,and can also realize the asymmetric structure design,wherein the mixing effect of the asymmetric structure design is superior to the mixing effect of the symmetrical structure.Therefore,in the improvement process for the V-type mixer,it is recommended that the two-tube long structure of the V-type mixer adopts an asymmetrical structure,and an additional mixing device is added in a direction perpendicular to the rotation axis of the V-shaped cylinder.