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摘    要
振动筛的研究不断地向着标准化、系列化、通用化发展，并引入现代化设计手段，采用新材料、新技术、新工艺，其目的在于不断扩大筛机应用领域，满足国民经济建设发展的需要，并担当对外出口的任务。
本文所设计的振动筛的筛分物料为饲料产品。该产品的大小不是很平均，为了做出更符合要求的物料就需要用振动筛来将球磨机产品进一步细分，将不符合要求的物料重新用球磨机磨小。经过这样的反复处理最终将物料全部做成符合要求的产品。本课题的振动筛为自同步双振动电机驱动的，其特点是结构简单、安装方便、成本低、容易操作及维护等。其筛箱为板梁铆焊组合结构，由主副侧板、管梁、入料挡板、出料板、筛板等组成，侧板选用低合金压力容器钢板，强度高、可焊性好，周边折弯，并在振动方向及沿纵向连接多根角钢，使侧板刚度大大增强，有利于强度的提高和噪音的降低。管梁由法兰盘、无缝钢管、加强槽钢等组成，重量轻、强度大，便于制造安装，具有互换性。加强槽钢上有T形孔，使用T形螺栓，便于筛板的安装维护，消除U形螺栓对管梁的磨损。工作原理：两台振动电机的型号相同，可以产生一种组合的直线振动。这种振动可以使输送槽体中的物料运动，并与筛面发生碰撞，使小于筛孔的物料透过，从而实现物料的几何分级，实现筛分。总体方案为：采用普通筛分法，振动形式为共振，运动轨迹为直线运动，激振方式为惯性式，隔振方式为一级隔振，隔振弹簧为金属螺旋式隔振弹簧。

关键词：振动筛; 筛箱; 振动电机

 
Abstract
The shaker research unceasingly to the standardization, the seriation, the universalized development, and the introduction modernization design method, uses the new material, the new technology, the new craft, its goal lies in unceasingly expands the sieve machine application domain, satisfies national economy construction the need to develop, and takes on the foreign exportation the duty.
Finally completely makes after such repeatedly processing the materi all tallies the request product. This topic shaker for self-synchronizing pair vibration motor-driven, Its characteristic is the structure simple, the installs convenient, the cost low, is easy to operate and the maintenance and so on. It sieves the box is board crossbeam riveting hitch welds built-up section, By host vice- side bar, Hollow beam, Enters the material back plate, Leaves material board, Sieves board and so on composition, The side bar selects the low-alloy pressure vessel steel plate, The intensity is high, The weldability is good, Peripheral knee bend, And in the vibration direction and along longitudinal connects themulti- roots angle steel, Causes the side bar rigidity big enhancement, Is advantageous to the intensity enhancement and noise reducing. Hollow beam by flange plate, Seamless steel pipe, Strengthens composition and so on channel steel, The weight light, the intensity is big, is advantageous for themanufacture installment, Has the interchangeability. Strengthens in the channel steel to have the T shape hole, Uses the T shape bolt, Is advantageous for screen board installs the maintenance, Eliminates the U shape bolt to the hollow beam attrition. Principle of work: Two vibrate the electrical machinery the model to be same, May have one kind of combination straight-line oscillation. This kind of vibration may cause in the transportation trough body thematerial movement, And has the collision with the screening surface, And has the collision with the screening surface, Thus realization material geometry graduation, Realization screening. The overall plan is: Uses the ordinary screening law, The vibration form for resonates, The path is the translation, Stirs up the strength vibration the way is the inertia type, The vibration isolation way is level of vibration isolations, The vibration isolation spring is the metal screw type vibrationisolation spring。

Keywords:the vibration screen; the box screen; the vibration electric machinery
 
目    录
摘    要 I
Abstract II
第1章 概述 1
1.1国内外现状 1
1.2 振动机械的用途和分类 1
1.2.1 振动机械的组成 2
1.2.2 振动机械的特点 2
1.2.4 振动机械的分类 3
第2章 主要问题及解决方案 5
2.1 振动筛降噪措施 5
2.2 常见故障及处理措施 5
2.2.1 筛分时筛子不下料或下料不畅 5
2.2.2 筛框断裂根 5
2.2.3 轴承过热 5
2.2.4 筛分的分级(根据筛分的目的) 6
第3章 直线振动细筛的结构、工作原理及总体方案的比较确定 7
3.1结构及工作原理 7
3.2直线型振动细筛的特点 7
3.3 各类筛分方法的比较确定 8
3.3.1 普通筛分方法 8
3.3.2 概率筛分方法 9
3.3.3 等厚筛分法 9
3.3.4 概率等厚筛分法 10
3.3.5 筛分方法的确定 10
3.4 振动形式的确定 10
3.4.1 非共振筛 10
3.4.2 共振筛 10
3.5 运动轨迹的确定 10
3.5.1 圆运动轨迹 10
3.5.2 直线运动轨迹 11
3.6激振方式的比较 11
3.6.1 弹性连杆式 11
3.6.2 电磁式 11
3.6.3 惯性式 12
3.6.4 激振方式的确定 12
第4章 其它零部件的选择 13
4.1隔振系统的选择 13
4.2筛箱及筛面 13
4.2.1筛箱 13
4.2.2筛面的比较选择 14
4.2.3 筛面的压紧装置 15
4.3支撑装置的选择 15
第5章 各部分设计计算 17
5.1运动学参数的选择计算 17
5.1.1 物料运动状态的选择 17
5.1.2 安装倾角的选择 17
5.1.3 振动方向角的选择 17
5.1.4 物料的平均速度 18
5.2工艺参数的确定 18
5.3动力学参数的选择计算 18
5.3.1工作机体的质量 18
5.3.2物料的结合质量 19
5.3.3 隔振系统的频率比及隔振弹簧刚度 19
第6章 结论 20
参考文献 21
致   谢 22