【正文】 ................12 2 液壓支架整體結(jié)構(gòu)分析及選型 ................................................................................13 支撐 掩護(hù)式 (ZZY)支架的特點(diǎn)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(hù)幫裝置形式的選擇 ......................................................................................15 支架側(cè)護(hù)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(jì) ......................................................................................................20 支架的最大高度和最小高度 ........................................................................20 梁端距和頂梁長(zhǎng)度的確定 ............................................................................21 支架的中心距和寬度 ......................................................................................22 底座長(zhǎng)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(jī) 構(gòu)設(shè)計(jì) ........................................................................................24 四連桿的分類(lèi) ......................................................................................................24 分體式 ..................................................................................................................24 液壓千斤頂式 ....................................................................................................24 四連桿機(jī)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(jī)構(gòu)的幾何特征 .................................................................................25 電算法設(shè)計(jì) ...........................................................................................................26 后連桿 L1與掩護(hù)梁長(zhǎng)度 L4的確定 ..........................................................26 確定其他各桿的長(zhǎng)度 ......................................................................................26 四連桿機(jī)構(gòu)的選優(yōu) ...........................................................................................27 C 語(yǔ)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(yàn)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(jì)算 ....................................................................................................40 支護(hù)強(qiáng)度和底座接觸比壓 .................................................................................44 實(shí)際支護(hù)強(qiáng)度計(jì)算 ..........................................................................................44 底座接觸比壓計(jì)算 ..........................................................................................44 C 語(yǔ)言程序編制 ..................................................................................................45 5 主要零、部件的強(qiáng)度校核 .........................................................................................47 校核的基本 要求 .....................................................................................................47 掩護(hù)梁強(qiáng)度驗(yàn)算 ....................................................................................................48 掩護(hù)梁 ..................................................................................................................48 掩護(hù)梁強(qiáng)度校核 ................................................................................................48 立柱強(qiáng)度的校核 .....................................................................................................53 立柱 .......................................................................................................................53 立柱穩(wěn)定性校核 .............................................................................................54 活塞桿的強(qiáng)度驗(yàn)算 ........................................................................................55 驗(yàn)算缸體厚度 .................................................................................................56 推移千斤頂缸筒和缸蓋焊縫的強(qiáng)度計(jì)算 ......................................................57 缸筒壁厚驗(yàn)算 ....................................................................................................58 活塞桿的強(qiáng)度驗(yàn)算 ........................................