【正文】 .......... 3 支架的結(jié)構(gòu)及工作原理 ..................................................................................... 4 液壓支架的組成 ................................................................................................. 4 液壓支架的工作原理 ........................................................................................ 7 液壓支架工況分析 ............................................................................................ 9 液壓支架立柱的工作過程 ............................................................................ 10 液壓支架設(shè)計的目的和要求 ............................................................................12 設(shè)計目的 .............................................................................................................12 對液壓支架的基本要求 .................................................................................12 2 液壓支架整體結(jié)構(gòu)分析及選型 ................................................................................13 支撐 掩護式 (ZZY)支架的特點及適用條件 ................................................13 液壓支架基本結(jié)構(gòu)部件選型 ..........................................................................14 頂梁 .......................................................................................................................14 護幫裝置形式的選擇 ......................................................................................15 支架側(cè)護板形式的選擇 .................................................................................16 底座 ......................................................................................................................18 推移裝置的形式選擇 ......................................................................................19 其他部件選擇 ....................................................................................................20 主要參數(shù)設(shè)計 ......................................................................................................20 支架的最大高度和最小高度 ........................................................................20 梁端距和頂梁長度的確定 ............................................................................21 支架的中心距和寬度 ......................................................................................22 底座長度 .............................................................................................................22 底座寬度 .............................................................................................................22 立柱位置的確定 ...............................................................................................22 其他附屬設(shè)備的配套 .......................................................................................23 3 液壓支架四連桿機 構(gòu)設(shè)計 ........................................................................................24 四連桿的分類 ......................................................................................................24 分體式 ..................................................................................................................24 液壓千斤頂式 ....................................................................................................24 四連桿機構(gòu)的力學(xué)影響及幾何特征 ..........................................................24 四連桿的力學(xué)影響 ..........................................................................................24 四連桿機構(gòu)的幾何特征 .................................................................................25 電算法設(shè)計 ...........................................................................................................26 后連桿 L1與掩護梁長度 L4的確定 ..........................................................26 確定其他各桿的長度 ......................................................................................26 四連桿機構(gòu)的選優(yōu) ...........................................................................................27 C 語言程序編制 ..................................................................................................29 立柱和千斤頂位置的確定 .................................................................................31 立柱的布置 ........................................................................................................31 立柱柱窩位置的確定 ......................................................................................32 側(cè)推千斤頂位置的確定 .................................................................................34 通風(fēng)斷面的驗算 .....................................................................................................34 4 液壓支架受力分析 .....................................................................................................36 液壓支架基本技術(shù)參數(shù)的確定 .....................................................................36 數(shù)學(xué)模型的建立 .................................................................................................38 α與 β之間的關(guān)系 ...........................................................................................39 受力分析計算 ....................................................................................................40 支護強度和底座接觸比壓 .................................................................................44 實際支護強度計算 ..........................................................................................44 底座接觸比壓計算 ..........................................................................................44 C 語言程序編制 ..................................................................................................45 5 主要零、部件的強度校核 .........................................................................................47 校核的基本 要求 .....................................................................................................47 掩護梁強度驗算 ....................................................................................................48 掩護梁 ..................................................................................................................48 掩護梁強度校核 .................................................................................