【正文】 ach This text, still to an advanced technology that the automobile crane adopts at present — Control technology of proportion of the electric liquid .Carry on the case study from principle , controlling part , return circuit controlling , control measure and impact on automobile crane ,etc. Therefore give the abundant affirmation to the application of the proportion of the electric liquid in the automobile crane of control technology The development prospect has very great hopes. key words:Crane truck Hydraulic pressure system Energyefficient Performance parameter Proportion of the electric liquid 重慶大學(xué)畢業(yè)設(shè)計（論文）用紙 第 １ 頁 目錄 摘要 ................................................................................................................................... I ABSTRACT .....................................................................................................................II 第 1 章 概述 .............................................................................................................. １ 關(guān)于汽車起重機(jī) ...................................................................................................... １ 液壓傳動應(yīng)用于汽車起重機(jī)上的優(yōu)缺點(diǎn) ................................................................... １ 優(yōu)點(diǎn) .................................................................................................................. １ 缺點(diǎn) ................................................................................................................. ２ 液壓系統(tǒng)的類型 ...................................................................................................... ２ 汽車起重機(jī)液壓系統(tǒng)功能、組成和工作特點(diǎn) ........................................................... ２ 汽車起重機(jī)液壓系統(tǒng)的 運(yùn)用現(xiàn)狀和發(fā)展趨勢 ............................................................ ４ 本課題來源、任務(wù)要求和整機(jī)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(jī)構(gòu)的作業(yè)情況 ......................................................................................... ８ 副臂的作業(yè)情況 ................................................................................................ ８ 三個以上機(jī)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(jī)液壓系統(tǒng)分析 ......................................................................................... １０ 各機(jī)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(yáng)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(xué)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 ........................................................................................................ ２