离心泵叶轮设计

1、12345678910111213141516171819202122232425262728293031323334353637383940414243444546基本参数基本参数项目流量扬程效率转数比转数C公式QH冋N3.65n；QnsH3/4初定Vs确定泵进出口泵直进径口直径Vs=2-3.5泵出口直径泵进口速度泵出口速度轮毂尺寸进水轮毂汽蚀转数泵汽蚀转数进口系数实取D=0.7DdminD=Ddmax实取dmi,Dnd,D4Q冗D2|高汽蚀性能：C=1000-1600,k=5兼顾汽蚀与效率：C=800-1000,k=4.5高效不抗汽蚀：进口当量直径进口直径初步确定叶轮主要尺寸C=600-8

2、00,k=4D二寸(D2d2)j0h叶轮出口宽度实取进口直径叶轮外径4748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293叶片出口角叶片进口角叶片进口直径D=0.85D1实取叶片数叶片出口厚度叶轮外径精出算口准圆备周速度叶片与盖板的夹角叶片圆周厚度叶片出口排挤系数出口轴面速度斯脱道拉滑移系数斯脱道拉绝对速度圆周分量有限叶片理论扬程威斯奈滑移系数威斯奈绝对速度圆周分量有限叶片理论扬程理论扬程有限叶片理论扬程普夫莱德尔经验系数d修正系数有限叶片数修正系数无穷叶片理论

3、扬程精算叶轮外径第一出口圆周速度出口直径D+D+、Z=6.521Sin(b2bi)D-D221实取Dnu=-2260X=90S=久：1，(C0Lbr)2u1sin九1zSW=1u12D2Qv=m2DbW222V=Quu22V_tanm取三种算法理论扬程平均值d=0.6导叶式压水室d=0.65-0.85蜗壳式压水室d=0.85-1.00蜗壳式压水室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