【作者】 周宁；

【导师】 孔建益； 蒋桂堂；

【作者基本信息】 武汉科技大学 ， 机械设计及理论， 2004， 硕士

【摘要】 环缝磨是武汉科技大学在20世纪90年代初从国外引进的一种磨机，被称为“21世纪磨机”的环缝磨，具有能耗低、能量密度高、效率高、粒度分布窄及噪音低等特点。环缝磨作为一种新研制的磨机，还有很多不完善的地方，而且，由于环缝磨内部研磨介质球的运动非常复杂，目前对环缝磨的粉碎机理还不是很清楚。因此，有必要深入地对环缝磨的结构及研磨机理进行研究，进一步认清环缝磨内介质球的运动规律，从而提高其粉碎效率。 本文的研究主要来源于教育厅重大科研项目：环缝磨研磨动力学及其影响因素研究。这个课题的主要目的就是对环缝磨的研磨动力学进行深入的研究，探明其微粉碎机理。同时详细研究缝隙宽度、研磨介质的粒度分布、转子转速、供料速度等工艺参数的影响。根据理论分析的结果调整工艺参数、改善机器结构。争取在机器结构与研磨效率上比原机器有较大的提高，研制出可研磨出小于10^-7米的超微粉的机器。 本文从理论和实践两个方面对环缝磨的粉碎机理及其内部介质球的运动规律进行了研究，主要的创新之处如下： （1） 给出了环缝磨的粉碎速度的求解公式。 （2） 运用流体动力学理论知识，结合试验，建立了环缝磨内介质球的运动模型；同时，为了配合试验研究，给出了定子所受力矩的求解公式。 （3） 模拟环缝磨的工作原理建立了一个试验台，用来研究环缝磨内介质球的运动和受力情况。 另外，本文还分析了环缝磨的粉碎模型、环缝磨内粉碎力随转子转速的变化规律以及进料流量及压力对介质球受力的影响。 环缝磨作为一种新研制的磨机，固然有其自身的优点，但是由于相关的理论和技术还处于初步的发展阶段，环缝磨还存在着很多不完善的地方。这就限制环缝磨的生产能力和粉碎效率，因此需要对环缝磨作更深入的研究工作，彻底搞清楚环缝磨的粉碎机理。本文所做的工作只是课题的一部分，有些工作还很不完善，要研制出能磨出纳米粉的环缝磨，还需要做更多的工作。不过，我相信随着微粉碎技术和制造工艺的不断发展，我们的目标一定能够实现。更多还原

【Abstract】 Annular Gap Affritor, known as "Mill in 21st century" , is a kind of mill introduced by WUST in 1980’ s. It has the characteristics such as low energy consumption, high energy density, high efficiency, narrow distribution of grain size, low noise and so on. As a newly developed mill, Annular Gap Affritor still has many incomplete places. And, because the movement of the medium-balls in it is very complicated, the crushing mechanism of it is still not very clear. So, it’ s necessary to study deeply about the structure and crushing mechanism, make clear the law of the movement of the medium-balls to raise it’ s crushing efficiency.The research of this article mainly stems from the great scientific research project of the education department: The Study of The Rubbing Dynamics and Influence factors. The main aim of this project is deeply studying the rubbing dynamics of Annular Gap Affritor, prove up it’ s ultra crushing mechanism. At the same time, study carefully the influence of the craft-parameters such as the width of gap, the distribution of the rubbing-medium’ s granularity, the rotate-speed of the rotator. According to the results of theory analysis, adjust the craft-parameter and improve the structure of the machine. Try to make greater improvement than the original machine on structure of the machine and rubbing efficiency and develop a machine that can rub out ultra-fine powder which is smaller than 10-7m.In this article, I study primarily the crushing mechanism of Annular Gap Affritor and the movement law of the medium-ball in it from two aspects: theory and practice, the main innovations of this article are listed below:(1) Given out the key formula for Annular Gap Affritor’ s crushing speed.(2) Using the knowledge of the hydrokinetics theory and combining experimentation, created the modal of the medium-balls’ movement in Annular Gap Affritor. Analyze; At the same time, in order to cooperate with the experimentation studying, given out the key formula of the moment received by stator.(3) Simulating the working principle of Annular Gap Affritor, created a test-bed to study the situation of the medium-ball’ s movement in it.In addition, this article also analyzed the crushing model of Annular Gap Affritor, the law of the crushing-force in Annular Gap Affritor changes with the rotator’ s rotating speed and the influence of flux and pressure to the force received by medium-ball.As a new kind of developed mill, Annular Gap Affritor dose have its merits,but, because the relative theories and technologies are still at preliminary developing stage, there are many incomplete places in it. These factors limit the production capacity and crushing efficiency of Annular Gap Affritor. So it needs to study deeply about Annular Gap Affritor, make clear completely its crushing mechanism. The works of this article are only part of the project, and some works are still very incompletely. There are more works to do to develop an Annular Gap Affritor which can rub out ultra-fine powder. But I believe that our purpose will come true certainly with the continuous development of ultra-fine crushing technology and manufacture craft.更多还原