【正文】 ....... 44 Chapter 6 ste nt s trength calculation .............................................. 47 VIII S trength condition ................................................................ 47 Hydraulic support intensity .................................................. 49 Before Liang Liang intensity......................................... 49 Top beam intensity ........................................................ 53 The strength of the base respectively ............................ 59 beam intensity .................................................... 65 Conclusion ....................................................................................... 72 Ack nowle dge ments .......................................................................... 73 Bibliog raphy ................................................................................. 74 1 第 1 章 緒論 放頂煤綜采法的優(yōu)缺點 優(yōu)點： 1 生產(chǎn)集中化程度高，大大減少采區(qū)數(shù)目與工作面的巷道掘進量，以及相應(yīng)的支護，維護等工作量與材料消耗。 caving agency. III 目 錄 摘 要 ...........................................................................................I Abstract ........................................................................................... II 第 1 章 緒論 ...................................................................................... 1 放頂煤綜采法的優(yōu)缺點 ....................................................... 1 放頂煤液壓支架的發(fā)展歷史 ................................................ 1 放頂煤液壓支架結(jié)構(gòu) 的基本特點 ........................................ 2 放頂煤液壓支架的分類 ....................................................... 2 放頂煤液壓支架使用條件和適用范圍 .................................. 3 放頂煤液壓支架使用條件 ......................................... 3 放頂煤液壓支架適用范圍 ......................................... 3 第 2 章 支架的總體方案設(shè)計 ............................................................ 4 設(shè)計任務(wù) .............................................................................. 4 支架結(jié)構(gòu)方案設(shè)計 ............................................................... 4 中反四連桿放頂煤液壓支架 ..................................... 4 中正四連桿低位放頂煤液壓支架 .............................. 5 中四連桿低位放頂煤液壓支架 .................................. 6 第 3 章 液壓支架的整體結(jié)構(gòu)尺寸設(shè)計 ........................................... 9 液壓支架設(shè)計的基本要求和基本參數(shù) ............................... 9 液壓支架的設(shè)計目的 .................................................. 9 設(shè)計時對液壓支架的基本要求 ................................... 9 液壓支架的參數(shù)確定 .......................................................... 10 支架高度 ................................................................. 10 支架的伸縮比 .......................................................... 11 支架間距的確定 ...................................................... 12 底座長度的確定 ...................................................... 12 頂梁長度的確定 ................................................................ 13 頂梁的長度計算 ...................................................... 13 頂梁寬度 ................................................................. 14 頂梁覆蓋率 ............................................................. 14 立柱位置的確定 ................................................................. 15 支架立柱數(shù)的確定 .................................................. 15 支撐方式 ................................................................. 16 立柱間距 ................................................................. 16 IV 立柱柱窩位置的確定 ............................................... 16 第 4 章 液壓支架的部件結(jié)構(gòu)設(shè)計 ................................................. 17 頂梁 ................................................................................... 17 立柱 ................................................................................... 17 掩護梁 ............................................................................... 17 四連桿機構(gòu) ........................................................................ 18 四連桿機構(gòu)的作用 .................................................. 18 四連桿機構(gòu)的幾何特征 ........................................... 18 用幾何作圖法來設(shè)計四連桿機構(gòu) ............................ 19 底座 ................................................................................... 23 側(cè)護板 ............................................................................... 23 千斤頂 ............................................................................... 24 推移千斤頂 ............................................................. 24 側(cè)推千斤頂 ............................................................. 24 前梁千斤頂 ............................................................. 24 護幫千斤頂 .............................................................. 24 后推移輸送機千斤頂 ............................................... 25 放煤機構(gòu)設(shè)計 .................................................................... 26 第 5 章 液壓支架受力分析 ............................................................ 27 液壓支架基本技術(shù)參數(shù)的確定 ........................................... 27 支護強度 .................................................................. 27 初撐力 ...................................................................... 27 移駕力和推溜力 ...................................................... 28 支柱及相關(guān)液壓系統(tǒng)參數(shù)確定 ................................ 28 液壓支架立柱強度驗算 ..................................................... 31 已知參數(shù) .................................................................. 31 油缸穩(wěn)定性計算 ....................................................... 32 活塞桿的強度計算 ................................................... 33 缸體的強度驗算 ...................................................... 37 液壓支架主要技術(shù)參數(shù) ............................................ 37 液壓支架受力分析 ............................................................. 38 支 架整體受力分析 ................................................... 40 前梁受力分析 .......................................................... 41 頂梁受力分析 ........