【正文】 ..........................................................................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(jì)算 ..............................................................................................18 液壓支架的設(shè)計(jì)要求 ...............................................................................................19 支架的主要結(jié)構(gòu) .......................................................................................................19 掩 護(hù)梁的設(shè)計(jì) ................................................................................................19 掩護(hù)梁護(hù)板的設(shè)計(jì) ........................................................................................20 四連桿機(jī)構(gòu)設(shè)計(jì)的要求 ................................................................................22 底座 ................................................................................................................24 中國礦業(yè) 大學(xué)畢業(yè)設(shè)計(jì)（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(diǎn)與選擇 ......................................................................25 3 底座長度的確定 ..............................................................................................25 液壓系統(tǒng)的設(shè)計(jì) .......................................................................................................26 液壓支架的液壓系統(tǒng)簡介 ............................................................................26 液壓支架傳動(dòng)系統(tǒng)的基本要求 ....................................................................26 液壓支架的液壓傳動(dòng)特點(diǎn) ............................................................................26 液壓系統(tǒng)總體方案的確定 .......................................................................................27 立柱系統(tǒng)的設(shè)計(jì) .......................................................................................................28 液壓缸工作壓力的確定 ................................................................................28 缸筒的設(shè)計(jì)計(jì)算 ............................................................................................29 缸筒的結(jié)構(gòu)設(shè)計(jì) ............................................................................................29 缸筒內(nèi)徑的計(jì)算 ............................................................................................29 液壓缸壁厚和外徑的計(jì)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 ............................................................................................34 液壓缸主要零件的材料和技術(shù)要求 ..........................................................34 1 缸體材料和毛坯 ..............................................................................................34 2 缸體的技術(shù)要求 ..............................................................................................35 3 活塞桿的材料 ..................................................................................................36 4 活塞桿的技術(shù)要求 ..........................................................................................36 立柱強(qiáng)度校核 ..............................................................................................37 液壓缸穩(wěn)定性的計(jì)算 ..................................................................................38 密封裝置的設(shè)計(jì) ..........................................................................................40 1 對密封裝置的主要要求 ..................................................................................40 千斤頂系統(tǒng)的選取 ...................................................................................................41 推移千斤頂?shù)倪x取 ........................................................................................41 平衡千斤頂?shù)倪x取 ........................................................................................42 側(cè)推千斤頂?shù)倪x取 ........................................................................................43 第四章 液壓支架的強(qiáng)度計(jì)算 .......................................................................................44 強(qiáng)度計(jì)算條件 ...........................................................................................................44 強(qiáng)度校核 ...................................................................................................................45 底座的強(qiáng)度校核 ............................................................................................45 頂梁上平衡千斤頂耳板與銷軸強(qiáng)度校核 ...................................................47 第五章 液壓支架的使用、維護(hù)與發(fā)展 .............................................................................50 液壓支架操作維護(hù)要求 ...........................................................................................50 液壓支架操作 ...........................................................................................................50 液壓支架操作管理事項(xiàng) ..........................................................................................50 維護(hù)和管理的具體內(nèi)容 ..........................................................................................51 液壓支架的故障及排除 ..........................................................................................52 結(jié)構(gòu)件和連接銷軸 ............................................