【正文】 ................................................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 ................................................................................................48 立柱強度的校核 .....................................................................................................53 立柱 .......................................................................................................................53 立柱穩(wěn)定性校核 .............................................................................................54 活塞桿的強度驗算 ........................................................................................55 驗算缸體厚度 .................................................................................................56 推移千斤頂缸筒和缸蓋焊縫的強度計算 ......................................................57 缸筒壁厚驗算 ....................................................................................................58 活塞桿的強度驗算 ...........................................................................................58 6 液壓控制系統(tǒng)選型設(shè)計 .............................................................................................61 液壓支架控制方式 .............................................................................................61 電液控制系統(tǒng) ......................................................................................................61 電液控制系統(tǒng)的組成 ......................................................................................61 控制功能 .............................................................................................................62 電液控制系統(tǒng)的工作原理 ............................................................................63 支架液壓系統(tǒng) ......................................................................................................63 經(jīng)濟技術(shù)分析 ....................................................................................................................66 結(jié) 論 .................................................................................................................................67 致 謝 .................................................................................................................................68 參考文獻 .............................................................................................................................69 附 錄 .................................................................................................................................70 附錄 A C 語言程序編制 .............................................................................................70 ........................................70 .............................................................................73 附錄 B 中華人民共和國煤炭行業(yè)標(biāo)準（部分） .............................................76 液壓支架立柱千斤頂內(nèi)徑及活塞桿外徑系列（ MT/T941996） ......76 液壓缸活塞行程系列 ........................................................................................79 譯文 .................