强烈推荐：气流粉碎机的设计与粒度控制含有所有机械cad图

摘要

超细粉体是指粒径小于10 的粉体。物料经过超细粉碎后，物料的粒度减小而且晶体结构和物理化学性质也发生改变。超微粉体不仅本身是一种功能材料，而且为新的功能材料的复合与开发展现了广阔的应用背景，在工业中有着广泛的应用。流化床式气流粉碎机因粉碎效率高，能耗小，是目前最先进的气流粉碎设备。本文研究了流化床式气流粉碎机的国内外发展现状，并对现有的粉碎机的设计原理和方法进行了分析。流化床式气流粉碎机的设计主要有两个部分的设计，一个是超音速喷嘴的设计：本文通过对现有的设计方案的分析，得到了一种便于加工的近似超音速的喷嘴的设计，并通过编程求得了喷嘴处于最佳状态时对应的马赫数；分级部分的设计也是一个难点，现有的分级轮设计方法忽略了许多因素，大多是依靠经验来设计，文中大量阅读相关资料，设计出了一种新型的叶轮分级，能达到最佳的分级粒径。对粉碎机分级轮的主轴和分级轮端头密封装置进行了设计。

关键词：流化床、气流粉碎机、超音速、拉瓦尔喷嘴、分级叶轮、、送料机 

ABSTRACT

Ultrafine powder is the size of the powder which less than 10 μm .The granularity of the materials were reduced, the physical and chemical properties also changed。Superfine powder is not only a function material but also show a broad background to the development of new composite materials and has a wide use in the industry。As ultra-fine crushing equipment in a major smash equipment, air grinder research plays an important role。Because of high efficiency and low energy consumption , fluidized bed opposed jet mill is the most advanced equipment of pulverize。The development of fluidized bed opposed jet mill was investigated at home and abroad ,and analyzed the principles and design methods of this type of equipment in this paper。There exist two main parts of the design in this paper，one part is the supersonic nozzle design: Based on the analysis of the existing design method。Based on analyzed the existing design methods，a similar facilitate processing of the supersonic nozzle design was obtained。And a program was made, which to get the corresponding Mach let the nozzle in the best condition obtained through the nozzle in the best condition。Many factors were overlooked in the existing classification design ,a lot plan is rely on experience of the designer。A new type of impeller grade which can run at the best classification size was design through read a lot of related data. The seal of the classification round spindle

mill and classification round was designed.       

Key Word: fluidized bed, grinder, supersonic, Laval nozzle, classification, feed machine

目    录

1.概述及设计方案  ………………………………………………………………1

1.1气流粉碎机研究的目的  ……………………………………………………1

1.1.1超细粉体的特性及研究目的……………………………………………… 1

1.1.2超细粉体的制备方法……………………………………………………… 2

1.2气流粉碎机的产生国内外现状及发展趋势………………………………… 3

1.3气流粉碎机的特点…………………………………………………………… 8

1.4设计方案…………………………………………………………………… 9

1.4.1设计要求……………………………………………………………………9

1.4.2总体设计方案的确定………………………………………………………9

1.4.3主要部件的设计方案………………………………………………………11

2.气流粉碎机的结构设计方法……………………………………………………14

2.1喂料机的设计…………………………………………………………………14

2.1.1螺旋输送机主要组成部件…………………………………………………16

2.1.2螺旋输送机的选型计算……………………………………………………17

2.2喷嘴的设计……………………………………………………………………20

2.2.1喷嘴的设计步骤……………………………………………………………22

2.3气流粉碎机的气管设备的设计………………………………………………35

2.4气流粉碎机磨腔的设计………………………………………………………35

2.5分级机的设计…………………………………………………………………38

2.6粒度的控制……………………………………………………………………46

2.7密封的设计……………………………………………………………………54

2.7.1泄露的原因………………………………………………………………  54

2.7.2 密封的分类………………………………………………………………  54

2.7.3常用密封结构形式及其特点……………………………………………  55

2.74密封的选择………………………………………………………………   56

3.流化床气流粉碎机的工艺配置与操作方式…………………………………  64

3.1流化床气流粉碎机的工艺配置……………………………………………  64

3.2流化床气流粉碎机的调试与操作…………………………………………  65

3.2.1流化床气流粉碎机的安装………………………………………………  65

3.2.2流化床的操作与调试……………………………………………………  65

4.总结 …………………………………………………………………………… 67

参考文献…………………………………………………………………………… 69

英文原文……………………………………………………………………………72

中文译文…………………………………………………………………………… 85

致    谢………………………………………………………………………… 102