谷物清选机设计【含CAD图纸】.doc

本科毕业论文（设计） 题 目 谷物清选机的设计 学 院 专 业 班 级 学 号 学生姓名 指导教师 完成日期 2015年10月23 XX学院教务处制 二〇一五年十月 谷物清选机的设计 当今社会，农业机械在机械工业中占据的比例越来越大，随着农耕的生产自动化，各种各样的农业机械将会出现并使用，本课题来源于当今社会机械工业谷物清选设备的创新和更新换代基础之上，通过设计出谷物清选机，从而来满足当今社会谷物清选设备不足的缺陷。 国内谷物清选机设备的研发及制造要与全球号召的高效经济、清选质量好，效率高等主题保持一致。近期对机械行业中谷物清选机的使用情况进行了调查，传统的谷物种子在没有谷物清选机而需要人工清选的情况下，效率低下，劳动强度大，所以设计一个专用的谷物清选机势在必行。 本文运用大学所学的知识，提出了谷物清选机的结构组成、工作原理以及主要零部件的设计中所必须的理论计算和相关强度校验，构建了谷物清选机总的指导思想，从而得出了该谷物清选机的优点是高效，经济，并且清选质量高，运行平稳的结论。 关键词： 谷物清选机 质量 设计 经济 结论 ??????? The design of grain cleaning machine With the development of science and technology, interdisciplinary mutual infiltration, mutual exchanges between the various industry, extensive use of new structure, new materials, new technology, the sleeve pressing machine is large, efficient, reliable, energy saving.Recently, the use of machinery industry, bearing and shaft sleeve shaft were investigated, found that the shaft, bearings and bushings in the machinery industry is one of the key parts. Come very naturally in the assembly of the installation is also very simple. In the installation if the use of artificial pressure with not only the labor intensity is too large and the size of each other is not easy to ensure the shaft, bearing and shaft sleeve, so the design of a special press be imperative. Graduation project this time is a tube axial compressive loading machine. This paper introduces the theoretical calculation to design sleeve pressing machine structure, working principle and main parts of the strength check and the advantages of the sleeve, pressing machine is efficient, economical, and high safety, stable operation. The overall plan . The relative position of two axle sleeve on the plane, the motor reducer to provide power through belt drives the screw rod to rotate, and drives the head