離心泵葉輪設(shè)計(jì)

1、12345678910111213141516171819202122232425262728293031323334353637383940414243444546基本參數(shù)基本參數(shù)項(xiàng)目流量揚(yáng)程效率轉(zhuǎn)數(shù)比轉(zhuǎn)數(shù)C公式QH冋N3.65n；QnsH3/4初定Vs確定泵進(jìn)出口泵直進(jìn)徑口直徑Vs=2-3.5泵出口直徑泵進(jìn)口速度泵出口速度輪轂尺寸進(jìn)水輪轂汽蝕轉(zhuǎn)數(shù)泵汽蝕轉(zhuǎn)數(shù)進(jìn)口系數(shù)實(shí)取D=0.7DdminD=Ddmax實(shí)取dmi,Dnd,D4Q冗D2|高汽蝕性能：C=1000-1600,k=5兼顧汽蝕與效率：C=800-1000,k=4.5高效不抗汽蝕：進(jìn)口當(dāng)量直徑進(jìn)口直徑初步確定葉輪主要尺寸C=600-8

2、00,k=4D二寸(D2d2)j0h葉輪出口寬度實(shí)取進(jìn)口直徑葉輪外徑4748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293葉片出口角葉片進(jìn)口角葉片進(jìn)口直徑D=0.85D1實(shí)取葉片數(shù)葉片出口厚度葉輪外徑精出算口準(zhǔn)圓備周速度葉片與蓋板的夾角葉片圓周厚度葉片出口排擠系數(shù)出口軸面速度斯脫道拉滑移系數(shù)斯脫道拉絕對(duì)速度圓周分量有限葉片理論揚(yáng)程威斯奈滑移系數(shù)威斯奈絕對(duì)速度圓周分量有限葉片理論揚(yáng)程理論揚(yáng)程有限葉片理論揚(yáng)程普夫萊德爾經(jīng)驗(yàn)系數(shù)d修正系數(shù)有限葉片數(shù)修正系數(shù)無(wú)窮葉片理論

3、揚(yáng)程精算葉輪外徑第一出口圓周速度出口直徑D+D+、Z=6.521Sin(b2bi)D-D221實(shí)取Dnu=-2260X=90S=久：1，(C0Lbr)2u1sin九1zSW=1u12D2Qv=m2DbW222V=Quu22V_tanm取三種算法理論揚(yáng)程平均值d=0.6導(dǎo)葉式壓水室d=0.65-0.85蝸殼式壓水室d=0.85-1.00蝸殼式壓水室p=wjzSZ(R2R2)21H=(1,P)H181%82%r/min298050m/s3mm221.2469754mm215mm150.5mm215mm180m/s3.176866897m/s4.532428158mm0取9604.5mm152.19

4、61498mm152.1961498mm1540.359183706mm12.147713530.459619408mm15.549695361613.22289681mm448.7183977度32度20mm130.9150枚5.698668533枚6mm5m/s70.212525度90mm30.195418450.871842884m/s5.848509830.85568502m/s39.68299417m284.31053270.14974624m/s39.29138258m281.5048145m379.6463854m315.15391080.71.0733333330.4025m442.00336m/s76.7990095mm492.2135228476476mm492.21352284760.8788430