[机械毕业设计论文]随车起重机伸缩臂架的优化设计说明书.doc

目 录 摘 要---------------------------------------------------------------------------------------------1 前 言---------------------------------------------------------------------------------------------2 1. 概述------------------------------------------------------------------------------------------6 1.1 随车起重机用途和特点--------------------------------------------------------------6 1.2 型号意义--------------------------------------------------------------------------------6 1.3 术语解释--------------------------------------------------------------------------------6 1.4 结构原理--------------------------------------------------------------------------------6 2. 伸缩臂架的计算----------------------------------------------------------------------------7 2.1 伸缩臂架的作用载荷及分析---------------------------------------------------------7 2.2 伸缩臂架的临界力的计算------------------------------------------------------------9 2.3 伸缩臂架的刚度校核------------------------------------------------------------------9 2.4 伸缩臂架的强度校核-----------------------------------------------------------------13 2.5 伸缩臂局部稳定性校核--------------------------------------------------------------17 2.6 伸缩臂的整体稳定性校核-----------------------------------------------------------19 3. 回转机构的选型---------------------------------------------------------------------------21 3.1 回转支承的受载情况-----------------------------------------------------------------21 3.2 回转支承选型所需技术参数--------------------------------------------------------21 4. 液压系统的设计计算---------------------------------------------------------------------26 4.1概述---------------------------------------------------------------------------------------26 4.2工作原理---------------------------------------------------------------------------------26 4.3 性能分析--------------------------------------------------------------------------------29 4.4 液压缸主要尺寸的确定--------------------------------------------------------------29 4.5 液压泵的选择--------------------------------------------------------------------------31 4.6 油箱的选择---