【正文】 ouble auger, special boring machine hydraulic system, can realize the work cycle is: positioning and clamping machine work cycles to fastforward, workers enter die block iron stay fast back to loosen, pull out the pin stop in situ. Working condition of hydraulic system design including the system analysis, draw up the hydraulic system schematic diagram, calculation and selection of hydraulic ponents and hydraulic system performance calculation, the design and the structure of 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 液壓傳動的發(fā)展概況 ..................................................................................... 1 液壓傳動在機(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 液壓傳動的定義 ............................................................................................ 4 液壓傳動的優(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)動功率及電機(jī)的規(guī)格、型號 ..................................... 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 ...........................................................................