Plan1Desenvolvimento do Clculo de uma bomba centrfuga axialVazo
Q=2m3/shv =0.9z=4(n.o de ps)Altura Hm=9.6mhh=0.88fe=0.9(fator de
estr,)hm=0.96n =800(rpm)vel. Especificans=3,65*n*[(Q^1/2)/(Hm^3/4)]
ns=757.1717890343(Dex/Dc)minQ' =Q/hv =2.2222222222m3/sDex =4,8 a
5,6*(Q'/n)^1/30.7590893988m0,4 a
0,6Htp=Hm/hh=10.9090909091madotado=0.45D2=Dex=0.7590893988mDc=D1
=Dint.0.3415902294mtentativas com a frmula(D2/D1)min0.4497675263OK
com adotadoVr =4*Q'/fe*p*(Dext^2-Dint^2) =6.8412826788m/sN.o de
secesDimetrosVel. TangCalc de VuCalc.de Winfngulo
b2inf6(m)U=p*D*n/60Vu=Hm*g/hh*uWinf=(Vr^2+(U-Vu/2)^2)^0,5b2inf=Vr/(u2-Vu/2)(m/s)(m/s)D1=10.34214.317.4812.5932.9220.42517.816.0116.3124.8130.50921.305.0220.0020.0040.59224.804.3123.6516.8150.67628.303.7827.2814.52D2=60.75931.803.3730.8812.80Cs*L
=tL/tLCsymxymax/L(2*Hp*60*9,81)/(z*n*Winf)t=3,1415*Di/4adotar(m)(coeficiente
de
sustentao)(m)(m)(m)0.31880.2680.80.2151.48519072960.0350.16310.24610.3340.70.2341.05312507660.0300.12840.20070.3990.650.2600.7728871620.0250.09630.16970.4650.60.2790.60804954170.0200.07170.14710.5310.550.2920.50408962270.0150.05140.13000.5960.550.3280.39632178970.0100.0305perfilngulo
deb=Re (Reynolds)escolhidoataque
db2inf+dRe=Winf*L/n6259.05341.96824126186245.86630.67334024436234.21524.21946361216233.49320.30358929386223.24417.76871082566222.98215.7819041133Mfp=
(Htp*g*3,1416*(D2^2-D1^2)/(z*4))*((D2-Di)/2)Wy=0,785*(y/2)^2*(L/2)Tenso
Mfp/Wykgf.*mm3kgf/cm2205.4762498250.000025799796.4518921506141.48102608640.0000206392685.497904416585.19470441020.0000159232535.033445198940.35836962080.0000109514368.522726967510.71310654260.0000064432166.271079667900.00000321760Verificaes
e frmulas teis1 - Coeficiente de
sustentaoCs*(L/t)=(2*g*Hp*(V2r/u2))/(Winf^2*sen(binf+l))CsCs=4,0*(ymx/L)+0,092*dutilizar
l entre 1 a 2
graus1.15713061211.44641326521.48519072960.71046963961.0149566281.05312507660.47946436660.73763748710.7728871620.34495561210.57492602020.60804954170.25978731270.47234056850.50408962270.20245483330.36809969690.39632178972
- Relao entre
Dext/Dint(Dext/Dint)mn.=1/[1+[(2,04*10^(-4))*(Q/hv)*n^2*hh]/(Hm*vr)]^0,50.4523308054j
constatado anteriormente OK!3 - Clculo da
potnciaP=(g*Q*Hm)/(75*ht)Pmotorht=hv*hh*hm336.700350CV0.760324-
Clculo do momento toror no eixo da bombaMt
=71620*(P/n)31333.75kgf*cm5 -Calculo do de (dimetro do eixo) a
toroValores de
tadmde=1,72*(Mt/tadm)*(1/3)SAE/ABNTkgf/cm2(cm)8.100133065610203007.694431838810403507.076118007941404506.42907987474340600-
Verificao dos dimetros com auxlio do grficoEntra-se
com:nqA=0,822*nsnqA =622.40Pelo grfico y=0.44u=(Hm*g*2)^0,5/ y^0,5
=31.1912257211m/sDext=(u*60) / p*n =0.7446mPelo grfico tambmDext/Dc
=0.46Dc=0.3425
