【正文】 ............................................... １０ 本機(jī)液壓系統(tǒng)分析 ......................................................................................... １０ 各機(jī)構(gòu)動(dòng)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(yáng)回路 ....................................................................................................... １４ 性能要求 ........................................................................................................ １４ 主要元件 ........................................................................................................ １５ 主要回路 ........................................................................................................ １５ 功能實(shí)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(xué)畢業(yè)設(shè)計(jì)（論文）用紙 第 ２ 頁 功能實(shí)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(shí)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(shí)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(shí)現(xiàn)和工作原理 ...................................................................................... ２４ 第 4 章 液壓系統(tǒng)設(shè)計(jì)計(jì)算 ...................................................................................... ２５ 液壓系統(tǒng)工作參數(shù)和各機(jī)構(gòu)主要參數(shù) ................................................................... ２５ 工作機(jī)構(gòu)主要參數(shù) ......................................................................................... ２５ 液壓系統(tǒng)參數(shù) ................................................................................................ ２６ 液壓元件選擇計(jì)算 ............................................................................................... ２７ 液壓馬達(dá)和液壓泵的選擇計(jì)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(jì)算 .................................................................................. ４４ 系統(tǒng)各回路功率計(jì)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(jì)算 ................................................................. ４４ 系統(tǒng)各回路性能的驗(yàn)算 ........................................................................................ ４５ 起升回路 ....................................................................................................... ４５ 回轉(zhuǎn)回路 ....................................................................................................... ５０ 伸縮回路 ....................................................................................................... ５１ 變幅回路 ....................................................................................................... ５３ 支腿回路 ....................................................................................................... ５４ 液壓系統(tǒng)的發(fā)熱驗(yàn)算 ............................................................................................ ５５ 工作循環(huán)周期 T ............................................................................................. ５５ 油泵損失所產(chǎn)生的熱能 H............................................................................... ５６ 重慶大學(xué)畢業(yè)設(shè)計(jì)（論文）用紙 第 ３ 頁 馬達(dá)產(chǎn)生的熱量 ............................................................................................. ５７ 油箱散熱量 ...............................................................................................