U064-汽车起重机伸缩系统设计 下载积分：150 资料编号： U064
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作品描述
作品包括:
设计说明书1份,共58页,
CAD版本图纸，共9张
目录
1 绪论·························································································································· 1
1.1 概论······················································································································ 1
1.2 国内外轮式起重机发展概况················································································· 2
1.2.1 国内汽车起重机的发展概况及趋势·····························································2
1.2.2 国外汽车起重机发展概况··········································································· 4
1.3 伸缩机构发展······································································································· 5
1.3.1 伸缩机构国外研究概况··············································································· 5
1.3.2 伸缩机构国内研究现状··············································································· 5
1.4 设计任务···············································································································5
2 臂架伸缩机构的设计···························································································· 7
2.1 臂架伸缩机构的设计···························································································· 7
2.1.1 臂架伸缩机构类型·······················································································7
2.1.2 伸缩方式对起重机性能的影响···································································· 7
2.2 伸缩机构选型······································································································· 8
2.3 吊臂截面的选型····································································································9
3 箱式伸缩式臂架设计·························································································· 11
3.1 箱式吊臂连接尺寸确定·······················································································11
3.1.1 臂架根部铰点位置的确定··········································································11
3.1.2 臂架各节点的确定·····················································································13
3.1.3 变幅油缸铰链的确定················································································· 15
3.1.4 吊臂尺寸的确定························································································ 18
3.1.5 吊臂截面的选择及截面尺寸确定······························································ 19
3.2 箱型伸缩臂具体计算·························································································· 20
3.2.1 箱型伸缩臂受力分析················································································· 20
3.2.2 伸缩臂的临界力························································································ 22
3.2.3 箱型伸缩臂的刚度校核············································································· 25
3.2.4 箱型伸缩臂的强度计算············································································· 29
3.2.5 箱形伸缩臂的局部稳定性校核·································································· 31
4 伸缩机构液压系统设计······················································································ 32
4.1 总体方案论证····································································································· 32
4.2 液压系统总体设计······························································································ 32
4.3 伸缩液压缸的计算和选型··················································································· 33
4.3.1 液压缸的分类、特点和应用······································································ 33
4.3.2 液压缸的设计计算·····················································································35
4.3.3 确定油缸的工作面积和工作压力······························································ 37
4.3.4 伸缩液压缸活塞杆直径的计算·································································· 37
4.3.5 伸缩液压缸的结构设计············································································· 38
4.3.6 活塞的设计································································································42
4.3.7 伸缩液压缸的缓冲装置············································································· 45
4.3.8 伸缩液压缸的材料和技术要求·································································· 47
4.4 液压元件的选择与专用件设计··········································································· 48
4.4.1 液压泵的选择···························································································· 48
4.4.2 液压阀的选择···························································································· 49
4.4.3 滤油器的选择···························································································· 50
4.4.4 液压油的选择···························································································· 50
4.4.5 油箱的选择································································································50
4.5 液压系统的性能验算·························································································· 51
4.5.1 压力损失验算···························································································· 51
4.5.2 液压系统总效率的验算············································································· 51
4.6 本章小结·············································································································52
5 结论·························································································································53
参考文献······················································································································ 54
致谢······························································································································· 55
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