【正文】 the major parts of the hydraulic cylinder design. Key words: hydraulic system hydraulic transmission hydraulic ponents. III 目錄 摘要 ................................................................................................................................. I Abstract ..........................................................................................................................II 第 1 章 緒論 .............................................................................................................. 1 液壓傳動(dòng)的發(fā)展概況 ..................................................................................... 1 液壓傳動(dòng)在機(jī)械行業(yè)中的應(yīng)用 ..................................................................... 2 液壓機(jī)的發(fā)展及工藝特點(diǎn) ............................................................................ 3 液壓系統(tǒng)的基本組成 .................................................................................... 4 液壓傳動(dòng)的定義 ............................................................................................ 4 液壓傳動(dòng)的優(yōu)缺點(diǎn) ......................................................................................... 5 第 2 章 設(shè)計(jì)任務(wù) .......................................................................................................... 6 要求 .................................................................................................................. 6 功能分析、需求設(shè)計(jì) ...................................................................................... 6 第 3 章 液壓系統(tǒng)的性能和參數(shù)的初步確定 .............................................................. 7 運(yùn)動(dòng)分析 .......................................................................................................... 7 液壓缸的負(fù)載分析 .......................................................................................... 8 導(dǎo)軌摩擦阻力計(jì)算 ............................................................................... 8 慣性力計(jì)算 ........................................................................................... 8 工作負(fù)載計(jì)算 ....................................................................................... 9 重力 ....................................................................................................... 9 液壓缸密封摩擦阻力計(jì)算 ................................................................... 9 液壓系統(tǒng)主要參數(shù)計(jì)算和工況圖的編制 .................................................... 10 預(yù)選系統(tǒng)設(shè)計(jì)壓力 ............................................................................. 10 計(jì)算液壓缸主要結(jié)構(gòu)尺寸 ................................................................. 10 確定夾緊缸的內(nèi)徑和活塞桿徑 ......................................................... 11 編制液壓缸的工況圖 ......................................................................... 11 第 4 章 液壓系統(tǒng)的選擇和方案的擬定 .................................................................... 13 制定液壓回路方案 ........................................................................................ 13 調(diào)速回路 ............................................................................................. 13 快速運(yùn)動(dòng)回路與速度換接回路 ......................................................... 13 油源形式 ............................................................................................. 14 壓力控制回路 ..................................................................................... 15 定位夾緊回路 ..................................................................................... 15 輔助回路 ............................................................................................. 15 擬定液壓系統(tǒng)圖 ............................................................................................ 15 第 5 章 各液壓元件的計(jì)算和選擇 ............................................................................ 18 液壓泵及其驅(qū)動(dòng)電機(jī)計(jì) 算與選定 ................................................................ 18 液壓泵的工作壓力的計(jì)算 ................................................................. 18 液壓泵流量計(jì)算 ................................................................................. 18 液壓泵規(guī)格的確定 ............................................................................. 18 確定液壓泵驅(qū)動(dòng)功率及電機(jī)的規(guī)格、型號(hào) ..................................... 19 液壓控制閥的選擇 ........................................................................................ 19 管道尺寸 ........................................................................................................ 21 油箱容量 ........................................................................................................ 21 IV 第 6 章 液壓系統(tǒng)性能的驗(yàn)算 .................................................................................... 22 回油路中的壓力損失 .................................................................................... 22 液壓泵工作壓力 ............................................................................................ 23 估算系統(tǒng)效率、發(fā)熱和溫升 ........................................................................ 23 計(jì)算系統(tǒng)效率 ..................................................................................... 23 計(jì)算系統(tǒng)發(fā)熱功率 ............................................................................. 24 第 7 章 液壓缸的設(shè)計(jì) ................................................................................................ 25 液壓缸工作壓力的確定 ................................................................................ 25 液壓缸的注意尺寸參數(shù)的確定 .................................................................... 25 液壓缸行程 s 的確定 .................................................................................... 25 液壓缸油口尺寸的確定 ................................................................................ 25 液壓缸的結(jié)構(gòu)設(shè)計(jì) ........................................................................................ 25 最小導(dǎo)向長(zhǎng)度的確定 .................................................................................... 26 缸體長(zhǎng)度的確定 ........................................................................................... 27 液壓缸的結(jié)構(gòu)設(shè)計(jì) ..............................................................