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1、5-20t桥式起重机毕业论文 - 摘 要 桥式起重机使厂矿企业实现机械化生产，减轻繁重体力劳动的重要设备。在一些连续性生产流程中他有事不可或缺的工艺设备。目前，桥式起重机被广泛应用在国民经济建设各个领域，产品也已经形成多个系列。随着经济建设的发展，用户对其性能要求越来越高，这需要我们从其零件着手，优化设计，提高桥式起重机的综合经济效益。 关键词：桥式起重机；起重机小车；卷筒；吊钩。 I Abstract Bridge crane to enable the realization of mechanical production of Factories and mines to reduce
2、 the importance of heavy equipmentmanual.In some of the continuity of the production process it is essential for process equipment .It can be in plant ,warehouse use ,also son of the use of open-air yard ,is a most widely used mechanical crane.At present ,the bridge crane is widely used in various f
3、ields of national economic construction,the production has also formed a number of series .With the development of the economic construction, users increasingly high performance requirements .so its design requirements has become more sophisticated,Which require us to proceed from the partsAnd optim
4、ize the design ,improve improve the comprehensivecost-effective bridge crane.This article mainly introduced the entire design theory and design process of bridge-type hoist crane，which focused on the design of the bridge crane hoisting mechanism and operation ofinstitutionsIncluding major bridge cra
5、ne car running in the overall design and layout of the transmission mechanism，the lifting bodies，agenciescalculate car runningSince there are groups or institutions reel and hook the design and calculation of the design group，and the choice of bear and coupling，the choice of motor，the choice and che
6、cking of reducerKey words：bridge-type hoist crane；crane trolley；reel；hook。 II 目 录摘 要 . I Abstract . II第1章 绪论 .11.1 起重机械的用途及工作特点 .11.2 起重机械的发展简史 .21.3 起重机械的组成和种类 .41.3.1 起重机械的组成 .41.3.2 起重机械的种类 .41.4 桥式起重机的分类和用途 .51.4.1 桥式起重机的分类 .61.4.2 桥式起重机的用途 .61.4.3 桥式起重机的基本结构 .71.5 桥式起重机的基本参数 .8第2章 吊钩桥式起重机设计任务书
7、. 112.1 设计参数. 112.2 工作条件. 112.3 设计原则. 11第3章 小车起升机构和运行机构的计算 . 123.1 起升机构计算. 123.1.1 确定起升结构传动方案，选择滑轮组和吊钩组 . 123.1.2 选择钢丝绳. 14 1 若滑轮组采用滚动轴承，当ih=4，查3表3-2-11得滑轮组效率h1=0.97，钢丝绳所受最大拉力： . 143.1.3 确定滑轮主要尺寸 . 153.1.4 确定卷筒尺寸并验算强度 . 153.1.5 选电动机 . 203.1.6 验算电动机发热条件 . 213.1.7 选择标准减速器 . 223.1.8 验算起升速度和实际所需功率 . 233
8、.1.9 校核减速器输出轴强度 . 24 III 3.1.10 选择制动器 . 253.1.11 选择联轴器 . 263.1.12 验算起动时间. 273.1.13 验算制动时间. 293.1.14 高速浮动轴计算 . 303.2小车运行机构计算 . 353.2.1确定机构传动方案 . 353.2.2 选择车轮与轨道并验算其强度 . 353.2.3 运行阻力计算 . 373.2.4 选电动机 . 383.2.5 验算电动机发热条件 . 383.2.6 选择减速器. 393.2.7 验算运行速度和实际所需功率 . 393.2.8 验算起动时间 . 403.2.9 按起动工况校核减速器功率. 41
9、3.2.10 验算起动不打滑条件 . 423.2.11 选择制动器 . 433.2.12 选择高速轴联轴器及制动轮 . 433.2.13 选择低速轴联轴器. 443.2.14 验算低速浮动轴强度 . 45第4章 大车运行机构的计算 . 474.1 确定传动机构方案. 474.2 选择车轮与轨道，并验算其强度 . 474.3 运行阻力计算. 504.4 选择电动机 . 514.5 验算电动机发热条件 . 524.6 选择减速器 . 524.7 验算运行速度和实际所需功率 . 534.8 验算起动时间. 534.9 起动工况下校核减数器功率 . 554.10 验算起动不打滑条件. 554.11 选
10、择制动器 . 584.12 选择联轴器 . 59 IV 4.13 浮动轴低速轴的验算. 604.14 浮动轴高速轴的验算 . 62第5章 桥架结构的计算参数 . 645.1 主要尺寸的确定 . 645.1.1 大车轮距 . 645.1.2 主梁高度 . 645.1.3 端梁高度 . 645.1.4 桥架端梁梯形高度 . 655.1.5 主梁腹板高度 . 655.1.6 确定主梁截面尺寸 . 655.2 主梁的计算 . 675.2.1 计算载荷确定 . 675.2.2 主梁垂直最大弯矩 . 685.2.3 主梁水平最大弯矩 . 695.2.4 主梁的强度验算 . 705.2.5 主梁的垂直刚度验
11、算 . 725.2.6 主梁的水平刚度验算 . 735.3 端梁的计算 . 745.3.1 计算载荷的确定 . 745.3.2 端梁垂直最大弯矩 . 745.3.3 端梁水平最大弯矩 . 755.3.4 端梁截面尺寸的确定 . 755.3.5 端梁的强度验算 . 765.4 主要焊缝的计算 . 795.4.1 端梁端部上翼缘焊缝 . 795.4.2 端梁端部下翼缘焊缝 . 805.4.3 主梁与端梁的连接焊缝 . 805.4.4 主梁上盖板焊缝 . 80结 论 . 82致 谢 . 83. 84 V CONTENTSAbstract I . I Abstract II . IIThe first
12、 chapter1 Introduction .11.1The lifting purposes and features .11.2crane development history.21.3The lifting component and type. 错误！未定义书签。1.3.1crane is composed of the . 错误！未定义书签。1.3.2lifting type .51.4Classification and application of bridge crane.61.41The overhead traveling crane classification.61
13、.42Uses bridge crane .61.43The basic structure of the overhead traveling crane .71.5The basic parameters of bridge crane .8The second chapter hook bridge crane design task book .112.1design parameters .112.2The working conditions of the .112.3 design principles.11 The third chapter trolley lifting m
14、echanism and a running mechanism ofthe calculation of .123.1Calculation of lifting mechanism .123.1.1determine hoisting structure transmiss selection of and hook group .123.12Selection of steel wire rope .143.13Determination of main dimensions pulley.153.1.4determine reel size and checking intensity
15、 .153.1.5select motor .203.1.6checking motor heating condition .213.17Selection of standard reducer .223.1.8checking hoisting speed and the required power .233.1.9check reducer output shaft strength .243.1.10Select brake .25 VI 3.1.11Selection of coupling.263.1.12Calculation of starting time of .273.1.13checking braking time .293.1.14high-speed floating-axis calculation .303.2Calculation of trolley running mechanism .353.2.1determine the mechanism transmission scheme .353.2.2selection of wheel and rail and checking its strength.353.2.3running resis
