毕业设计（论文）-大功率偏心摆振试验机偏心机构设计.doc

****大学本科学生毕业设计（论文） 大功率偏心摆振试验机偏心机构设计 学 生： 学 号： 指导教师： 专 业：机械设计制造及自动化 ******机械工程学院 2OO9年6月  Graduation Design (Thesis) of Chongqing University Design of the Eccentric Mechanism of High-power Shimmy eccentric testing machine Undergraduate: Zeng Yuhao Supervisor: Prof. Gong Xiansheng Major: Mechanical Design Manufacturing and Automation June 2009  摘 要 大功率偏心摆振试验机是为验证大型弹性联轴器性能而设计的。该试验机的模型主要有三种，一种是曲柄摇杆机构，一种是滚珠丝杆机构，另一种是齿轮齿条机构[1]。本论文选择的是第一种，主要设计任务是确定机构各构件详细尺寸，满足设计的要求。 试验机偏心机构在工作过程中承受的最大扭矩是25 KN.m，摇杆摆角范围为±10度，在范围内无极可调，曲柄为有级可调的几组偏心量不同的偏心轴，连杆在一定尺寸范围内可以无级调定杆长。机构的尺寸包括长度尺寸和截面尺寸。长度尺寸主要有机构摇杆摆角范围来确定，截面尺寸由机构承受的最大扭矩来确定。 本论文从摇杆摆角范围出发，利用Matlab软件中的优化工具箱进行尺寸优化，得到各个构件的长度，再通过Matlab中的Sumulink工具进行动态仿真[2]，验证尺寸是否满足设计要求，通过多次验证修改，得到最优长度尺寸。再根据机构承受的最大扭矩，利用机构的静力学模型和零件的的强度条件，选定各构件的截面尺寸。尺寸定下来后，用ProE[3]为各个构件建立实体模型，并进行装配，再利用ProE仿真功能，获得机构的运动动画。最后，用Ansys软件[4]对摇杆和连杆应力应变分析，验证构件的强度。通过验证，设计的机构满足运动和强度要求。 关键词: 大功率偏心摆振试验机，曲柄摇杆机构，Matlab,ProE,Ansys  ABSTRACT High-power Shimmy eccentric testing machine is specifically designed for verifying the performance of flexible coupling. There are two models of the testing machine, the one is the crank-rocker mechanism, and the other is ball screw mechanism. In this paper, the author chooses the former, and the main task is to determine the detailed size of crank-rocker mechanism l to meet the design requirements. During the working Process, the maximum torque rolling in the testing machine is 25 KN.m. The angle range of rocker is ?10 degrees with no limit to change the degree. The crank is the one of eccentric shafts with different amounts of eccentricity. In the range of a certain size, we could select the size of the link at discretion. The size of the testing machine includes the length and section size. The length is mainly determined by the scope of the rocker, and the section is mainly determined by the maximum torque rolling in the testing machine. In this paper, with the range of the rocker, using the Matlab Optimization Toolbox, the lengths of vario