玉米粉碎机的设计【全套18张CAD图纸毕业论文】【农业机械】

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目录
1、中英文摘要 ……………………………………… 1
1.1中文摘要
1.2 Summary
2、研究与设计此课程的目的、意义和方向…………2
2.1研究与设计此课程的背景
2.2研究与设计此课程的目的和意义
2.3研究的方向
3、国内外发展的现状…………………………………3
3.1国外玉米粉碎机发展的现状
3.2国内玉米粉碎机发展的现状
4、零部件的选择………………………………………4
4.1粉碎机类型的选择
4.2 进料斗
4.2.1料斗的选择
4.2.2进料口的位置的选择
第1页
4.2.3进料口数量的选择
4.3筛片
4.3.1　筛孔直径
4.3.2　筛片面积及开孔率
4.3.3　筛片包角
4.4传动方案的确定
4.4.1常见的机械传动方案
4.4.2机械传动方案的选择
4.5动齿盘的选择
4.5.1齿盘厚度
4.5.2齿盘数目
4.5.3动齿盘末端线速度
4.5.4齿筛间隙
4.6粉碎室形状的确定
4.7动力的确定
5、齿盘式粉碎机的组成和工作………………………5
5.1粉碎机的构造
5.2工作原理
5.3齿盘式粉碎机的主要工作部件
5.4影响齿盘粉碎机性能的因素
第2页
6、皮带传动的计算……………………………………6
7、齿盘式粉碎机的安装和使用………………………7
7.1安装
7.2使用
8、粉碎机的保养和维修………………………………8
8.1保养
8.2维修
9、结论…………………………………………………9
9.1设计的特点
9.2设计解决的问题和未解决的问题
9.2.1设计解决的问题
9.2.2设计未解决的问题
10、参考文献…………………………………………10
11、心得体会…………………………………………11

第3页
1中英文摘要
1.1中文摘要
目前,国内用于玉米粉碎的主要机型是卧式锤片粉碎机。该机型尽管优点较多,但其缺点也比较突出,这就是能量消耗大、生产率不高的问题。为解决这些问题,多年来,在设计上也采取了不少改进措施,如加大筛板包角、设计水滴形粉碎室、设计偏心粉碎室、加强辅助吸风等,这些措施虽也有一定效果,但受卧式锤片粉碎机整体结构的限制,难以有明显的成效。另外，还有齿爪式粉碎机、立式粉碎机、水滴型粉碎机，齿爪式粉碎机其结构紧凑，体积小，可靠性高，但能耗大，对粉碎多种物料的适应性差；立式粉碎机生产率高，能耗低，无需吸风，换筛方便，有效地干扰或破坏了粉碎室内的气物环流层，避免了重复无效的过度粉碎，但结构复杂，价格昂贵，颗粒大小的分级困难，不适合于普通的场合；水滴型粉碎机粉碎室呈水滴型，粉碎效率高，能耗小，但结构复杂，体积大，制造加工难，工艺复杂；揉搓式粉碎机采用动定齿盘，依靠动定齿盘之间的相对的高速运动，使被粉碎物受齿盘揉搓、冲击，剪切，摩擦及物料彼此间冲击等综合作用，来粉碎物料。
关键词：动定齿盘、筛片、揉搓、剪切、粉碎
1.2 Summary
   Currently, the domestic used for the main model that the corn smash is the lie type  hammer slice smash the machine. That model though the advantage is more, its weakness is also more outstanding, this is the energy to consume big, not high problem of rate of production.In order to resolve these problems, many in the last years, also adopted not a few improvement measure on the design, wrap the Cape and design the drop of water form to smash the room and design to lack of impartiality to smash the room and strengthen to lend support to absorb the breeze such as the enlargement plank etc., although these measures also have the certain result, is smash by the lie type  hammer slice the machine is whole structural of restrict, and is hard to have obvious result.Moreover, still have the claw type to smash the machine, sign type to smash the machine, the drop of water type to smash the machine, the claw type smashes the machine its structure tightly packed, the physical volume is small, but can consume greatly, the credibility is high, to smash the adaptability of various material to differ;The sign type smashes the machine rate of production high, can consume low, did not need to absorb the breeze, change the convenience, availably interference or broke to第4页
smash the indoor spirit  thing circulation layer, avoid repetition invalid smash excessively, but the structure complications, the price      is expensive, the ratings of the grain size is difficult, is not suitable for in common of situation;The drop of water type smashes the machine to smash the room to present the drop of water type, smashing the efficiency high, can consume small, but the structure is complicated, the physical volume is big, the manufacturing process difficult, craft complications;The roll type smashes the machine adoption to move certainly dish of , depend on move settle oppositebetween dish of of high speed sport, make to be smash the thing is pound at by the dish, shearing to slice, rub and material each other pound at etc. comprehensive function, smash the material.
2研究与设计此课程的目的、意义和方向
2.1研究与设计此课程的背景
玉米是当今世界最重要的三大粮食作物之一,种植面积和总产量仅次于水稻、小麦,但其单位面积产量却位居第一,并且人类对玉米的加工利用程度远远超过了水稻和小麦,玉米已成为粮、饲、工业原料兼用作物,以其为原料的产品多达3500多种。我国玉米总产量和单产水平都已超过了小麦而跃居粮食作物的第二位;玉米增产总额在粮食增产中占到40%左右,远高于水稻26%和小麦22%;并且玉米播种面积在粮食播种面积的比重小于总产的比重,足见玉米在我国粮食生产中有举足轻重的地位。