混料机的关键技术参数及内部流场模拟分析

发布时间：2018-05-01 10:13

本文选题：搅拌 + 参数化　；参考：《郑州大学》2015年硕士论文

【摘要】：本文以斜轴式高效混料机为研究对象,在综合分析传统混料机的基础上利用三维设计软件SOLIDWORKS设计混料机的筒体和搅拌桨,分析其在混料过程中的混合原理,通过简化其三维模型,分析了混料机筒体倾斜角度、搅拌轴安装位置以及搅拌叶片长度对混料效果的影响;基于三维流场理论,综合运用SOLIDWORKS、DEM-EDEM、FLUENT等软件,对斜轴式高效混料机筒体内部流场进行流体动力学分析。通过对已有立轴式混料机搅拌叶片和筒体的形式特征来对比分析,综合学习和利用国内外关于混料机研发技术的基础上,设计出一种新型的斜轴式混料机。该混料机是采用逆流原理混合的高效设备,混合盘以-4rad/s的速度顺时针旋转,转轴逆时针转速30rad/s,这样通过混合盘与搅拌轴的相对运动使物料不仅作水平移动也垂直运动,可以在短时间内达到混合均匀的目的。结合计算流体力学理论,采用EDEM离散元分析方法,模拟仿真筒体内物料的混合情况,设定10s、20s、30s、40s、50s五个时间段,来分别计算出混合度进行对比分析。选取合适参数化的模型进行有限元分析,采用多重参考系(MRF)及有限体积法,利用ANSYS ICEM进行结构化网格划分,建立搅拌筒流体动力学模型。运用流体动力学固、液混合模型,对搅拌筒内流体在搅拌叶片作用下的运动状态进行分析,研究筒体倾斜角度、搅拌叶片长度及速度变化对混合质量的影响,分别得出速度和压力云图,建立起搅拌筒流场性能与搅拌性能的对应关系。研究结果将为以后的新型混料机筒体和搅拌轴的开发以及性能预估提供理论指导和依据。
[Abstract]:In this paper, the inclined shaft type high efficiency mixer is taken as the research object. On the basis of comprehensive analysis of the traditional mixer, the mixing principle of the cylinder and agitator of the mixer is designed by using three-dimensional design software SOLIDWORKS, and the mixing principle in the process of mixing is analyzed. By simplifying the three-dimensional model, the influence of the inclined angle of the mixer cylinder, the position of the mixing shaft and the length of the mixing blade on the mixing effect is analyzed, and based on the three-dimensional flow field theory, the software SOLIDWORKS DEM-EDEMMEUENT is used synthetically, such as SOLIDWORKSU DEM-EDEMMEUENT, etc. The hydrodynamic analysis of the flow field in the cylinder of the inclined shaft type high efficiency mixer is carried out. A new type of inclined shaft mixer was designed by comparing and analyzing the formal characteristics of the blade and cylinder of the vertical shaft mixer and synthetically studying and utilizing the research and development technology of the mixer at home and abroad. The mixer is a highly efficient equipment with countercurrent principle. The mixing disk rotates clockwise at a speed of -4 radr / s, and the rotating shaft rotates counterclockwise at 30 radr / s, which makes the material move not only horizontally but also vertically through the relative motion of the mixing disk and the mixing shaft. The mixture can be evenly mixed in a short period of time. Combined with the theory of computational fluid dynamics, the mixing of materials in the cylinder is simulated by using EDEM discrete element analysis method, and the mixing degree is calculated and analyzed respectively in five time periods of 10 s ~ 20 s ~ 30 s ~ 30 s ~ 40 s ~ 50 s. The appropriate parameterized model is selected for finite element analysis. The multi-reference system MRF) and the finite volume method are used to divide the structured meshes with ANSYS ICEM, and the hydrodynamic model of the mixing cylinder is established. By using the solid and liquid mixing model of fluid dynamics, the motion state of the fluid in the mixing cylinder under the action of the stirring blade is analyzed, and the influence of the inclined angle of the cylinder, the length and the velocity of the stirring blade on the mixing quality is studied. The velocity and pressure cloud diagrams are obtained, and the corresponding relationship between the flow field performance and the mixing performance is established. The research results will provide theoretical guidance and basis for the development and performance prediction of the new mixer barrel and mixing shaft in the future.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.71

【参考文献】