【正文】 ...................................80 plate weld......................................................................................80Results of the ........................................................................................................82Thanks ..................................................................................................................83Reference ..............................................................................................................84VIII 第1章 緒論 起重機械的用途及工作特點起重機械主要用于裝卸和搬運物料，是現(xiàn)代化生產(chǎn)的重要設(shè)備。 II 目 錄摘 要 ....................................................................................................................... I Abstract .................................................................................................................... II第1章 緒論 ............................................................................................................1 起重機械的用途及工作特點 .........................................................................1 起重機械的發(fā)展簡史 ...................................................................................2 起重機械的組成和種類 ................................................................................4 起重機械的組成 .................................................................................4 起重機械的種類 .................................................................................4 橋式起重機的分類和用途 ............................................................................5 橋式起重機的分類 .............................................................................6 橋式起重機的用途 .............................................................................6 橋式起重機的基本結(jié)構(gòu) ......................................................................7 橋式起重機的基本參數(shù) ................................................................................8第2章 吊鉤橋式起重機設(shè)計任務(wù)書 ........................................................................ 11 設(shè)計參數(shù)................................................................................................... 11 工作條件................................................................................................... 11 設(shè)計原則................................................................................................... 11第3章 小車起升機構(gòu)和運行機構(gòu)的計算 ................................................................. 12 起升機構(gòu)計算............................................................................................ 12 確定起升結(jié)構(gòu)傳動方案，選擇滑輪組和吊鉤組 .................................. 12 選擇鋼絲繩...................................................................................... 14 1 若滑輪組采用滾動軸承，當ih=4，查[3]表3211得滑輪組效率h1=，鋼絲繩所受最大拉力： .................................................................................. 14 確定滑輪主要尺寸 .................................................................................. 15 確定卷筒尺寸并驗算強度 ................................................................. 15 選電動機 ......................................................................................... 20 驗算電動機發(fā)熱條件 ........................................................................ 21 選擇標準減速器 ............................................................................... 22 驗算起升速度和實際所需功率 .......................................................... 23 校核減速器輸出軸強度 .................................................................... 24 III 選擇制動器 .................................................................................... 25 選擇聯(lián)軸器 .................................................................................... 26 驗算起動時間................................................................................. 27 驗算制動時間................................................................................. 29 高速浮動軸計算 ............................................................................. 30 ....................................................................................... 35 .............................................................................. 35 選擇車輪與軌道并驗算其強度 .......................................................... 35 運行阻力計算 .................................................................................. 37 選電動機 ......................................................................................... 38 驗算電動機發(fā)熱條件 ...............................................................