【正文】 ..........................1 國內(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 按移動方式分類 ..............................................................................................7 液壓支架的工作原理 .................................................................................................8 液壓支架的支護方式 ...............................................................................................10 液壓支架主要結(jié)構(gòu)件及其作用 ............................................................................... 11 頂梁 ................................................................................................................ 11 掩護梁 ............................................................................................................ 11 底座 ................................................................................................................ 11 四連桿機構(gòu) ....................................................................................................12 立柱 ................................................................................................................12 推移機構(gòu) .......................................................................................................12 液壓系統(tǒng)及其控制元件 ...........................................................................................13 支架的設(shè)計特點 .......................................................................................................13 本設(shè)計液壓支架各項技術(shù)特征 ...............................................................................13 第三章 液壓支架的主要結(jié)構(gòu)設(shè)計 .......................................................................................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 底座長度的確定 ............................................................................................17 頂梁長度的確定 ............................................................................................17 1 支架工作方式對支架頂梁長度的影響 ..........................................................17 2 頂梁長度的計算 ..............................................................................................18 液壓支架的設(shè)計要求 ...............................................................................................19 支架的主要結(jié)構(gòu) .......................................................................................................19 掩 護梁的設(shè)計 ................................................................................................19 掩護梁護板的設(shè)計 ........................................................................................20 四連桿機構(gòu)設(shè)計的要求 ................................................................................22 底座 ................................................................................................................24 中國礦業(yè) 大學(xué)畢業(yè)設(shè)計（論文）說明書 V 1 底座的主要作用 ..............................................................................................24 2 底座的結(jié)構(gòu)型式、特點與選擇 ......................................................................25 3 底座長度的確定 ..............................................................................................25 液壓系統(tǒng)的設(shè)計 .......................................................................................................26 液壓支架的液壓系統(tǒng)簡介 ............................................................................26 液壓支架傳動系統(tǒng)的基本要求 ....................................................................26 液壓支架的液壓傳動特點 ............................................................................26 液壓系統(tǒng)總體方案的確定 .......................................................................................27 立柱系統(tǒng)的設(shè)計 .......................................................................................................28 液壓缸工作壓力的確定 ................................................................................28 缸筒的設(shè)計計算 ............................................................................................29 缸筒的結(jié)構(gòu)設(shè)計 ............................................................................................29 缸筒內(nèi)徑的計算 ............................................................................................29 液壓缸壁厚和外徑的計算 ............................................................................31 液壓缸工作行程的確定 ................................................................................32 缸蓋厚度的確定 ............................................................................................32 最小導(dǎo)向長度的確定 ....................................................................................33 缸體長度的確定 ...............................................