【正文】 ........................................... ４ 本課題來源、任務(wù)要求和整機性能參數(shù) .................................................................. ５ 本課題主要研究工作 ............................................................................................... ７ 第 2 章 液壓系統(tǒng)元件選 擇 .......................................................................................... ８ 典型工況分析及對系統(tǒng)要求 .................................................................................... ８ 伸縮機構(gòu)的作業(yè)情況 ......................................................................................... ８ 副臂的作業(yè)情況 ................................................................................................ ８ 三個以上機構(gòu)的組合作業(yè)情況 ........................................................................... ８ 典型工況的確定 ................................................................................................ ８ 系統(tǒng)要求 .......................................................................................................... ９ 液壓系統(tǒng)類型選擇 ............................................................................................... １０ 本機液壓系統(tǒng)分析 ......................................................................................... １０ 各機構(gòu)動力組合、分配及控制 ........................................................................ １１ 各種執(zhí)行元件的選擇 ............................................................................................ １２ 第 3 章 各液壓回路組成原理和性能分析 .............................................................. １４ 主副卷揚回路 ....................................................................................................... １４ 性能要求 ........................................................................................................ １４ 主要元件 ........................................................................................................ １５ 主要回路 ........................................................................................................ １５ 功能實現(xiàn)和工作原理 ...................................................................................... １５ 回轉(zhuǎn)回路 .............................................................................................................. １７ 性能要求 ....................................................................................................... １８ 主要元件 ........................................................................................................ １８ 主要回路 ........................................................................................................ １８ 重慶大學畢業(yè)設(shè)計（論文）用紙 第 ２ 頁 功能實現(xiàn)和工作原理 ...................................................................................... １８ 伸縮回路 ............................................................................................................. １９ 性能要求 ........................................................................................................ １９ 主要元件 ........................................................................................................ １９ 主要回路 ........................................................................................................ ２０ 功能實現(xiàn)和工作原理 ...................................................................................... ２０ 變幅回路 .............................................................................................................. ２１ 性能要求 ........................................................................................................ ２１ 主要元件 ........................................................................................................ ２１ 主要回路 ........................................................................................................ ２２ 功能實現(xiàn)和工作原理 ...................................................................................... ２２ 支腿回路 .............................................................................................................. ２３ 性能要求 ........................................................................................................ ２３ 主要元件 ........................................................................................................ ２３ 主要回路 ........................................................................................................ ２３ 功能實現(xiàn)和工作原理 ...................................................................................... ２４ 第 4 章 液壓系統(tǒng)設(shè)計計算 ...................................................................................... ２５ 液壓系統(tǒng)工作參數(shù)和各機構(gòu)主要參數(shù) ................................................................... ２５ 工作機構(gòu)主要參數(shù) ......................................................................................... ２５ 液壓系統(tǒng)參數(shù) ................................................................................................ ２６ 液壓元件選擇計算 ............................................................................................... ２７ 液壓馬達和液壓泵的選擇計算 ........................................................................ ２７ 液壓閥的選擇 ................................................................................................ ３７ 液壓輔助元件選擇 ......................................................................................... ４０ 第 5 章 系統(tǒng)各回路性能計算 .................................................................................. ４４ 系統(tǒng)各回路功率計算 ............................................................................................ ４４ 各回路功率選取 ............................................................................................. ４４ 管路系統(tǒng)容積效率及壓力效率計算 ................................................................. ４４ 系統(tǒng)各回路性能的驗算 ........................................................................................ ４５ 起升回路 ...................................................................................................