论文标题:环缝磨结构工艺参数的优化研究
The Optimizing Research on Structure and Technological Parameters of Annular Gap Mill
论文作者 夏军勇
论文导师 孔建益；蒋桂堂,论文学位 硕士,论文专业 机械设计及理论
论文单位 武汉科技大学,点击次数 117,论文页数 63页File Size2552k
2004-05-20论文网 http://www.lw23.com/lunwen_326063242/ 环缝磨,超细粉体,粉碎机理,结构工艺参数,优化
Annular Gap mill,fine powder,milling mechanism,structural and technological parameters,optimization
环缝磨是20世纪80年代末到90年代初开发的一种新型磨机。这种磨机被称为“二十一世纪磨机”。它具有能耗低、效率高、噪音低等特点。其基本原理是将研磨能量集中到一个狭小的缝隙内，大幅度提高研磨能量密度，以获得良好的研磨效率。本文在前人的研究工作基础上，对环缝磨主要结构形式进行了分析、设计、更新和升级，并通过研磨动力学的理论分析和大量的实验，对环缝磨的主要结构工艺参数进行了优化和探讨，力争在机器结构与研磨效率上有较大的提高，研制出可研磨＜10~(-7)m(纳米级)的超微粉的研磨机器。 本文的创新之处在于： 1、利用动力学的知识对环缝磨的研磨区和分离区的介质球的分布进行了分析； 2、从强度理论和功耗定理对环缝磨的粉碎模型和研磨原理进行了分析和评价，推导出了研磨时介质球和物料之间的能量传递； 3、本文还提出了环缝磨存在最佳结构工艺参数，并通过大量的实验研究了研磨轮数(或时间)、转子转速、供料速度、料浆浓度、研磨间隙和研磨介质球配比等六个结构工艺因素对环缝磨研磨最终粒度和研磨效率的影响，得出了较优的研磨结构工艺参数。 4、根据较优的结构工艺参数对环缝磨结构进行了改进和升级，实验结果：d(n，0.5)=0.64um，d(n，0.9)=1.34um，此粒度相对于没有采取优化结构工艺参数前有很大改进。
Annular Gap Mill is a new kind of mill, which was developed during 1980"s and 1990"s. This kind of mill is called "21"st century mill". It has many advantages such as less energy-consuming, high efficiency and low noises. The principle of the mill is concentrating the milling energy into a confined annular gap, in order to increase energy density and acquire high milling efficiency. On the base of the study of predecessor, certain analysis, design and update have been done in this paper. Also, through some academic analysis in dynamics and a great deal of experiments, some discuss and research on structural and technological parameters is involved here. The purpose of all is to update the mill"s structure and improve the efficiency of milling and develop the machine for milling fine powder which is more fine than 10-7m.The innovation of this text lies in:1、The distributing orderliness of medium grain in separating area and milling area have been studied in this text;2、The smashing model and milling mechanism of the Annular Gap Mill in intensity theory and energy-consuming theorem have been analyzed and appraised; The energy transmitted between medium ball and supplies while grinding have been educed;3、The best structure and technological parameters of the Annular Gap Mil have been proposed in his text. The influence of six structure and technological parameters, including of rounds(or time) of grinding, rotational speed of the rotor, the speed of supporting material, thickness of liquid, milling gap and proportion of different medium grain to the final grain size and grind efficiency through a large number of experiments have been studied. And the optimizing structural and technological factors been found;4、After improving and upgrading the structure according to the optimum structural and technological parameters, the last granularity d(n,0.5) =0.64um,d(n,0.9) =1.34um is great improvement comparing to the result of not adopting the optimum structural and technological parameters;
|
