【正文】 automation of mining. Integrated mechanization of coal mining is a significant increase in coal production, the only way to increase economic efficiency. In order to meet the growing demand for coal to be massproduced mechanized mining equipment, the rapid increase in the integrated coal face mechanization. This paper mainly expounds the top screen type hydraulic support beam, cover four bar linkage and balance jack design . This design selection of hydraulic support a top cover, stents, using four link mechanism, and to improve the stents stress state。 中國(guó)礦業(yè) 大學(xué)畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) IV 目 錄 摘 要 ..................................................................................................................... I Abstract .................................................................................................................... II 前 言 ...................................................................................................................... III 第一章 緒 論 .........................................................................................................1 國(guó)內(nèi)外研究的現(xiàn)狀 .........................................................................................1 本課題研究的目的和意義 ..............................................................................2 第二章 液壓支架基本理論分析 ................................................................................4 綜采工作面的布置和循環(huán)工作過(guò)程 ...............................................................4 液壓支架的組成 ...........................................................................................5 液壓支架的分類 ............................................................................................6 按支架和圍巖的相互作用分類 ..............................................................6 按移動(dòng)方式分類 ...................................................................................7 液壓支架的工作原理 .....................................................................................8 液壓支架的支護(hù)方式 ................................................................................... 10 液壓支架主要結(jié)構(gòu)件及其作用 ..................................................................... 11 頂梁 .................................................................................................. 11 掩護(hù)梁 ............................................................................................... 11 底座 .................................................................................................. 11 四連桿機(jī)構(gòu) ........................................................................................ 12 立柱 .................................................................................................. 12 推移機(jī)構(gòu) .......................................................................................... 12 液壓系統(tǒng)及其控制元件 ................................................................................ 13 支架的設(shè)計(jì)特點(diǎn) .......................................................................................... 13 本設(shè)計(jì)液壓支架各項(xiàng)技術(shù)特征 ..................................................................... 13 第三章 液壓支架的主要結(jié)構(gòu)設(shè)計(jì) ............................................................................ 14 確定液壓支架結(jié)構(gòu)參數(shù)的原則與內(nèi)容 ........................................................... 14 確定支架結(jié)構(gòu)參數(shù)的原則 ................................................................... 14 確定支架結(jié)構(gòu)參數(shù)的內(nèi)容 .................................................................. 14 液壓支架主要結(jié)構(gòu)參數(shù)的確定 ..................................................................... 14 液壓支架的高度與伸縮比 ................................................................... 14 中心距和寬度的確定 .......................................................................... 16 支架間距 ........................................................................................... 17 底座長(zhǎng)度的確定 ................................................................................. 17 頂梁長(zhǎng)度的確定 ................................................................................. 17 1 支架工作方式對(duì)支架頂梁長(zhǎng)度的影響 ................................................... 17 2 頂梁長(zhǎng)度的計(jì)算 .................................................................................. 18 液壓支架的設(shè)計(jì)要求 ................................................................................... 19 支架的主要結(jié)構(gòu) .......................................................................................... 19 掩護(hù)梁的設(shè)計(jì) .................................................................................... 19 掩護(hù)梁護(hù)板的設(shè)計(jì) ............................................................................. 20 四連桿機(jī)構(gòu)設(shè)計(jì)的要求 ...................................................................... 22 底座 .................................................................................................. 24 中國(guó)礦業(yè) 大學(xué)畢業(yè)設(shè)計(jì)（論文）說(shuō)明書(shū) V 1 底座的主要作用 .................................................................................. 24 2 底座的結(jié)構(gòu)型式、特點(diǎn)與選擇 ............................................................. 25 3 底座長(zhǎng)度的確定 .................................................................................. 25 液壓系統(tǒng)的設(shè)計(jì) .......................................................................................... 26 液壓支架的液壓系統(tǒng)簡(jiǎn)介 ................................................................... 26 液壓支架傳動(dòng)系統(tǒng)的基本要求 ............................................................ 26 液壓支架的液壓傳動(dòng)特點(diǎn) ................................................................... 26 液壓系統(tǒng)總體方案的確定 ............................................................................ 27 立柱系統(tǒng)的設(shè)計(jì) .......................................................................................... 28 液壓缸工作壓力的確定 ...................................................................... 28 缸筒的設(shè)計(jì)計(jì)算 ................................................................................. 29 缸筒的結(jié)構(gòu)設(shè)計(jì) ................................................................................. 29 缸筒