大流量离心泵水力设计计算

一、23二、三、6四、kg/m31000离心水泵叶轮水力设计计算已知设计参数米3/小时米3/秒流量Q6500.18061水泵比转数计算比转数196.48扬程转数65米2900转/分1、泵效率计算水力效率10.03960.8830.83892容积效率0.98033机械效率0.969274总效率MT/T671-2005煤矿用隔爆型潜水泵效率C曲线ns=605企业制造质量误差因数（自选效率）83%泵轴功率及电动机功率计算47.00%泥浆密度取值KW139.55轴功率计算五米0.2768米0.22150.8六、米0.15850.042342.265选[T]=350*105N/m22泵最小轴径毫米米叶轮主要几何参数的初步计算4泵出口流速KW160.49泵轴传递扭矩牛米528.5米/秒3.00米/秒3泵进口流速4.69178泵进出口直径确定泵进口直径1毫米276.83电动机功率KW167.46KW139.55轴功率计算毫米221.462泵出口直径取Dd/Ds=叶轮进口直径初算34毫米158.54K0根据表5-1选取(叶片泵设计手册）米0.06米0.0287米0.1695毫米169.51米0.15米0.26440.9152.560.286.67初步确定轮毂直径dh4叶片进口直径初算K1=0.7~1.0低比转数取大值毫米D02+dh2叶轮进口直径初算35叶片出口直径初算选择毫米速度系数法计算叶轮出口直径264.38米0.0589米0.0445米0.1113毫米111.3392.809半开式叶轮叶片出口宽度初算毫米58.8671.12毫米44.53235.18m/s35.718速度系数法计算叶轮出口直径1叶片出口宽度初算叶片进口宽度初算根据图5-3叶轮速度系数曲线图选取Ku2米毫米0.24选Kb21.4选Kv0.85选Cv0.30米0.0594度25.00度25.00六、计算选取13叶片数1理论扬程12叶片进口安放角选取进口安放角11叶片出口安放角选取出口安放角10两相流渣浆泵叶片出口宽度初算选取:米0.0259半开式叶轮叶片出口宽度初算659.400.448.9873毫米0.44计算Kc0.895弧度弧度米叶轮外径的精算######度90弧度1.571理论扬程米米0.020m/s10.27######2叶片出口轴面速度0.81590.8214叶片修正系数PP=R10.0763R20.14S0.00690.3343七、序号123456b(mm)35.1334.4231.12282828Rc(mm)43.6454.8988120140160L(mm)023.9960.9793.04113.04133.04液流过流断面积计算350.24检查轴面流道过水断面变化2m4叶轮出口直径11.8617.200.331叶片修正系数P出口圆周速度m/s低比转数叶轮，可以认为：dx=dr,则：S=(r22-r12)/2P=P21.1024.6228.13A=2*3.14*Rc*b(mm2）/10009.6307891011121314151651015202530354045505560657075808590951001718192021222324252627282930105110115120125130LF12345618256043,6454,8988120140160R30R60八、1、i/Rj60Rh25n2012302112.536005087.5045.9660.0071.33流道biRciRci*biRc*b0-120.8835.52741.65761—214.0452.98743.8392Ri相对误差%1742.74840.1469-0.1469轴面中间流线计算表过水断面号A序号i2进口分点半径公式A=(i(Rj2-Rh2)/n)+Rh2过水断面变化曲线轴面流线绘制考虑到比转数小，故拟分2个流道，3条流线。07891011121314151651015202530354045505560657075808590951001718192021222324252627282930105110115120125130LF1234560-120.1641.77842.08321—214.757.08839.0760-117.8259.491060.11181—215.768.441074.5080-115.58901402.21—215.58901402.20-11412016801—2141201680九、度3弧度0.0523iFi(mm2)Di(mm)Ui(m/s)Ψ1i(假定）Vmi(m/s)B1i(0)Ψ1i计算B1i最终013342.7511016.700.4928.1762.370.6130111762.54109.4616.620.51530.4164.370.61332210397.62125.9619.130.55332.0362.190.657302、0.00000.00000.00000.0000叶片进口安放角选择计算1、正冲角：通常取叶片进口角大于液流角。叶轮进口形成正冲角。0.1789-0.1789-0.67440.67441067.315168041402.2840.579623叶片进口安放角计算表R60R3028012选取90选取20九、选择Su20.03叶轮出口角度计算叶片厚度（毫米）2、4u1*vu1=0进口无预旋123计算点轴面截线和轴面流线的夹角，一般λ=60o—90Om/s叶片出口安放角选择计算Ψ20.827出口圆周速度出口排挤系数m/s计算流程9.9342.49出口轴面速度度29.6194十米0.039叶轮出口角度计算推导公式：β'2=arctgu2*vm2/(u22-gHt)弧度0.5166941基园直径米0.30取：1.06涡形体断面平均速度涡室进口宽度20.04取：4米/秒18.573舌角5涡室设计¢1(º)F1(mm2)¢2(º)F2(mm2)¢3(º)F3(mm2)¢4(º)F4(mm2)30810.25752025.631203241.01165#######b2（mm)7涡形体面积计算660.7797.23540mm24456.39Q4=((180º-¢)/180º)*(Q/2)隔舌起始角15ºm3/s0.08275133.69K（宽）mm24.31ns196H65Q0.179680295m/s646.8490635m3/h166.6518405Q=(H3/4*nS/3.65*n)2H2160%HT35U35.07548939D2231.110.1364185230.18410910.8158911.3495904291417.98740411.007272621539.147539.2319739.231969850.23924243380MM