【正文】 2 西華大學(xué)畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 目 錄 摘 要 ............................................................................................................................... 4 1前言 ................................................................................................................................ 5 畢業(yè)設(shè)計(jì)的目的和意義 .................................................................................... 6 設(shè)計(jì)的主要任務(wù) ................................................................................................ 6 2葉輪的設(shè)計(jì) .................................................................................................................... 6 葉輪主要參數(shù)的確定和結(jié)構(gòu)方案的確定 ........................................................ 7 確定泵進(jìn)出口直徑 ................................................................................ 7 汽蝕計(jì)算 ................................................................................................ 7 比轉(zhuǎn)速的計(jì)算 ........................................................................................ 8 確定效率 ................................................................................................ 8 確定功率 ................................................................................................ 9 初步確定葉輪的主要尺寸 .................................................................. 10 精算葉 輪外徑 ...................................................................................... 12 葉輪軸面投影圖繪制中的相關(guān)計(jì)算 .............................................................. 14 葉輪出口速度 ...................................................................................... 14 流道中線檢查 ...................................................................................... 14 中間流線的劃分 .................................................................................. 15 葉片進(jìn)口邊的確定 .............................................................................. 16 葉輪進(jìn)口速度 ...................................................................................... 17 編程計(jì)算 A、 B、 C三點(diǎn)的葉片安放角 .............................................. 20 葉片繪型 .......................................................................................................... 22 繪型原理 .............................................................................................. 22 繪型步驟 .............................................................................................. 22 繪制葉片進(jìn)出口三角形 ...................................................................... 24 3汽蝕驗(yàn)算 ...................................................................................................................... 26 計(jì)算清水中的必需汽蝕余量 .......................................................................... 26 4壓水室的計(jì)算及繪型 .................................................................................................. 26 渦室的主要結(jié)構(gòu)參數(shù) ...................................................................................... 27 渦室繪型步驟 .................................................................................................. 29 5離心泵結(jié)構(gòu)設(shè)計(jì)及部分零件的強(qiáng)度校核 .................................................................. 30 離心泵結(jié)構(gòu)特點(diǎn) .............................................................................................. 30 葉輪 ...................................................................................................... 31 泵體 ...................................................................................................... 31 泵軸 ...................................................................................................... 31 軸承 ...................................................................................................... 31 密封環(huán) .................................................................................................. 31 3 西華大學(xué)畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 填料函 .................................................................................................. 31 部分零件的強(qiáng)度計(jì)算與校核 .......................................................................... 32 最小軸徑的計(jì)算 .................................................................................. 32 鍵的計(jì)算及強(qiáng)度校核 .......................................................................... 32 軸向力的計(jì)算 ...................................................................................... 33 軸承壽命的計(jì)算 .................................................................................. 35 填料的計(jì)算 .......................................................................................... 37 結(jié)論 ................................................................................................................................. 38 總結(jié)與體會(huì) ..................................................................................................................... 38 謝辭 ................................................................................................................................. 38 參考文獻(xiàn) ......................................................................................................................... 39 4 西華大學(xué)畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 摘 要 本次設(shè)計(jì)是進(jìn)行 IS125100250 型單級(jí)單吸離心泵的設(shè)計(jì)，根據(jù)給定的主要設(shè)計(jì)參數(shù)，主要完成了葉輪、泵殼的水力設(shè)計(jì)，以及泵的總體結(jié)構(gòu)設(shè)計(jì)，并驗(yàn)算泵的抗汽蝕性能，繪制泵的 總裝圖及葉輪、泵殼、泵軸等零件圖，對(duì)葉輪、泵體、泵軸、軸承、鍵、法蘭盤(pán)和聯(lián)結(jié)螺栓等泵的主要零部件進(jìn)行強(qiáng)度校核。自動(dòng)變頻供水裝置設(shè)計(jì)，繪制了變頻供水裝置的管路布置圖，水泵機(jī)組安裝圖以及自動(dòng)供水的主電路圖、控制圖。 【關(guān)鍵詞】 離心泵、水力設(shè)計(jì)、強(qiáng)度校核、恒壓供水 Abstract This program is a design for the singlestage and singlesuction centrifugal pump, IS10065315 pump. This design pletes the structural design of the pump and hydraulic design of the impeller, pump body. Check the hydraulic design to prevent cavitaion. This design also carries on intensity and rigidity calculation of the impeller, casing,shaft, bearings, key, ring flange, coupling bolt and other parts. This disign applies bined constant pressure water supplying, automatic start and stop syst