机械工程自动化毕业设计书圆振动筛偏心块装置（激振装置）设计书.docVIP

本科毕业设计 题目： 圆振动筛偏心块装置（激振装置）设计 学 院: 机械自动化学院 专 业: 机械工程及自动化 学 号: 学生姓名: 指导教师: 日 期: 二〇一三年六月  摘 要 目前在我国各种矿山机械设备中，振动筛是问题较多、维修量较大的设备之一。这些问题突出表现在筛箱断梁、裂帮,稀油润滑的振动器漏油、齿轮打齿、轴承温升过高、噪声大等问题，同时伴有传动带跳带断带等故障。这类问题直接影响了振动筛的使用寿命，严重影响了生产效率。 本设计对振动筛进行了方案论述，包括振动筛的分类与特点，确定了设计方案；进行了物料的运动分析、振动筛的动力学分析，以及动力学参数的计算，合理设计了振动筛的结构尺寸；进行了激振器的偏心块设计与计算（包括原始的设计参数）；进行了轴承的选择和计算，与电动机设计与校核；进行了主要零部件的设计与计算，如皮带的设计计算与校核，弹簧的设计计算，轴的强度有限元分析，然后进行了设备维修、安装、润滑及密封的设计。 关键词：圆振动筛；激振器；有限元法  abstract At present,among the varied mine machineries the shaker is one of the devices which need frequent maintenance and have their own problems. For the shaker, such problems consist of breakages for beam, straining box, and sieve plate; oil spill out when the vibration exciter used oil lubrication; meantime, the bearing may break in the high work temperature. What’s more, the vibration exciter also produces big noise. All these issues directly influence the life of the shaker, and they also seriously affect the production rate. The framework about designing shaker has been introduced, including the classification and features, and design program of the shaker; After analyzing on the shaker’s dynamics of the shaker, the structure of vibrating screen size has been designed; conducting the research of the eccentric block of the exciter, afterward, design and calculate for the original parameters concerned with; designing and verification for the main components, such as motor, belts, spring, the axis, bearings. Then the maintenance of equipment, installation, lubrication and the design for sealing have been studied in the latter part of this project. What’s important in this design, Finite Element Method (FEM) has been used to compute the strength of an critical axle on the round exciter. Key words: Round Shaker; Vibrator; FEM 目 录 1 绪论 1 1.1 前言 1 1.2 课题研究背景 1 2 设计任务 2 2.3 设计任务 2 3 单轴圆运动惯性振动筛的构造与特点 3 3.1 简单振动筛 3 3.2 自定中心振动筛 3 3.3 其他形式的圆振筛 3 3.4 单轴圆振筛激振器及其存在问题 4 3.4.1 激振器