毕业设计论文+++钵苗有序抛秧机优化设计.doc

钵苗有序抛秧机优化设计 陈星玮 摘 要 ： Abstract This article studies the cam-lever detrusion mechanism and seedlings guide-canal of mouse-cage-cam-lever detrusion type ordered throwin-g mechanism.Because of seedlings plate can not be pressed well on the throwing mechanism,some rice plotted-seedlings will not be pushed out.It effects the utilization of rice plotted-seedlings and after landing having uniform spacing in the rows. visualize the existing optimization program of cam-lever detrusion mechanism and get the best result. 2. Improve the the structure of cam-lever detrusion mechanism for the goal of seedling plate can be pressed well.Original seedlings row spacing is 1mm, now the row spacing is uneven.Improve the platen device for adding wheels on the bar.Sliding friction will change to rolling friction by this method,and the resistance be reduced. 3.For the goal of seedling having uniform spacing in the rows, build the kinematics mathematical model of seedling falling,according throwing machines structure and actual working environment, come of cam-lever detrusion mechanism of the constraint conditions,find constraint conditions and get the result of optimization.The radius of cones circle of the seedlings guide-canal is 169mm,the height is 410mm,the semi-cone angle is . 4.According to the optimization parameters,the mouse-cage-cam-lever detrusion type ordered throwing mechanism and seedlings guide-canal are designed. 5.In the end,there is a conclusion for the paper,and tentative plans for further research are put forward. Key words：rice plotted-seedlings；throwing machine；platen device；optimization 目 录 摘 要 Abstract 第1章 绪论 1 1.1 概述 1 1.2 国外水稻有序抛秧机的发展状况 1 1.3 国内水稻有序抛秧机的发展状况 2 1.4 研究内容和具体方法 8 第2章 杠杆顶出机构运动学分析和参数优化 9 2.1 杠杆顶出机构的工作原理 9 2.2 杠杆顶出机构运动学分析 9 2.3 杠杆顶出机构参数优化 11 2.3.1 建立优化数学模型 11 2.3.2 优化计算 12 2.3.3 优化程序界面（GUI）设计 14 2.3.4 优化结果 15 第3章 抛秧机构结构改进 16 3.1 秧盘结构设计 16 3.2 抛秧装置结构改进 18 3.3 压盘装置结构改进 19 第4章 钵苗下落过程运动学分析和导苗装置优化 20 4.1钵苗下落过程描述 20 4.2 钵苗下落过程的运动学分析 20 4.2.1 钵苗在空中下落分析 20 4