LD型电动单梁桥式起重机毕业设计论文.doc

PAGE - PAGE 3 - 毕业设计书 设计（论文）题目：LD型电动单梁桥式起重机 目录 2/n 一 概述··············································································1 1.单梁桥式起重机的工作方式················································1 2.单梁桥式起重机的机构特点················································1 3.桁架梁和箱的比较···························································1 4.LD型电动单梁桥式起重机各部件作用····································1 5.运行机构······································································3 6.发展趋势······································································4 7.工作条件及设计要求·························································4 8.型式及设计的构造特点······················································5 二 选择电动葫芦的型号规格·······················································6 三 主梁设计计算····································································6 1.主梁断面几何特性····························································6 2.主梁强度的计算·······························································7 3.主梁刚度的计算······························································10 4.主梁稳定性的计算·····························································12 四 端梁设计计算····································································12 1.轮距的确定·····································································12 2.端梁中央断面集合特点······················································13 3.起重机最大轮压······························································14 4.最大歪斜侧向力······························································19 5.断面中央断面合成压力······················································20 五 主、端梁连接计算·······························································20 1.主、端梁连接形成及受理分析··············································20 2.螺栓拉力的计算······························································20 六 大车运行机构设计计算··························································23 1.确定机构的传动方案·························································23 2.选择