摘要大型振动平筛是现代小麦制粉工业中最主要的分级和取粉设备，它有多层筛面，且筛面水平放置，因此又称高方平筛。由于设备工作振动频率远高于系统的低阶固有频率，因此在筛体停车过程中存在共振现象，这将导致设备的工作性能和寿命大大降低。本课题针对FSFG8×24F型振动平筛，设计一种新型的自调偏心距式激振器，即在平衡重块与筛体之间设置弹簧装置，使得偏心距在机器停车过程中逐渐减小，使设备在共振状态时的激振力处于一个较低的水平，从而达到消除设备在停车过程中的共振的目的。该激振装置的设计主要围绕以下几个步骤展开：偏重块结构设计，偏重块连接形式的选择，弹簧装置的设计。并利用SOLIDWORKS进行各零件实体建模与装配，生成二维装配图以及个主要零件的工程图。63244

毕业论文关键词：高方平筛  偏心距  偏重块  设计  建模

毕业设计说明书（论文）外文摘要

Title The Exciting Device Design and Simulation for the Square Plansifter

Abstract Square Plansifter，who has multi-storey surface placed horizontally, is the uppermost and most extensively adoptive equipment for filtrating and grading in the modern flour milling industry. As the device is working at a vibration frequency a lot higher than the low-order inherent frequency of the system, there is a resonance phenomenon in the sieve parking process, which will cause that the work performance and lifespan of the device is greatly reduced. Aiming at the square plansifter of FSFG8×24F, this paper designs a new exciting device with the function of self-adjusting eccentricity: Through the design of spring device, reduce the exciting force of the device at resonant state, thus eliminate the resonance. According to the request of design, this paper completes the following tasks, including mainly the structure design of the eccentric object and the spring device, the linking form of the eccentric object with the body of plansifter. Based on that, with the software of Solidworks and AutoCAD, the three-dimensional assemble model, planar assemble model diagram and spare parts diagram of the whole driving device are obtained respectively. 

Keywords: square plansifter    eccentric distance    eccentric object  

design    modeling  

1. 目录

2. 绪论 5

2.1 课题研究的工业背景 5

2.2 本课题研究的价值及主要工作 7

3. 新型激振器的总体方案设计 9

3.1 传动机构调节机制 9

3.2 新型激振装置的工作原理 10

3.3 弹簧装置连接形式的选择 12

4. 设计计算 12

4.1 偏重块各参数的确定 12

4.2 弹簧各参数的确定 14

4.3 销轴各参数的确定 18

4.4 传动轴的受力分析与强度校核 18

4.5