桨式搅拌器的功率计算

杨小波(中国铝业山东分公司恒成机械制造厂,山东淄博255061)[],,,[];;[]TF3511502[]A[]1003-8884(2008)02-0010-03PowerCalculationofPaddleAgitatorYANGXiao-bo(HengchengMachineryFactory,ShandongBranch,CHALCO.,Zibo255061,China)Abstract:Besidesensuringthetechnicalrequirements,minimalpowerconsumptionforagitationpurposeisoneofaimsofagitatordesign.Thispapercalculatesthepowerwhenagitatorpspaddleisindifferentangle,andtheresultscanberegardedasthereferenceforstructuredesignofagitatorequipment.Keywords:agitation;paddleagitator;power[]2007-11-28[](1977-),,,,,.,,,,),,,,;,,,,1204A5218@10m,218m,10m,8m,4,230mm;2m,130mm,n=0135r/s;2211(1)212,,;,;,,,,102008(2)1Table1Technicalparameters/(g/L)d50/LmG/(Pa#s)/%Q/(kg/m3)300~5001000102801250Np[1]:P=NPQn3d5(1)P),W;NP);Q),kg/m3;n),r/s;d),m;(1),,NP213NP[1~2],:NP=ARe+B1000+112Re01661000+312Re0166pHD0135+bDsin112H(2)A=14+bD670dD-0162+185B=10113-4bD-0152-1114dDp=111+4bD-215dD-0152-7bD4Re=d2nQG(3)Re);H),b;b),m;d),m;D),m;G),Pa#s21311计算挡板系数[1]Kb=nbWbD112(4)Kb);nb),4;Wb),Wb=0123m,(4):Kb=4@2302800112=01199[1],0135,21312计算操作数dD=2218=01714bD=0113218=010465HD=10218=31571A=14+010465@õ670@(01714-016)2+1858=23B=10[113-4@(010465-015)2-1114@(01714)]=119p=111+4@010465-215@(01714-015)2-7@0104654=111721313无挡板条件下搅拌功率数的计算(1)(H=90b)NP]90b,(3):Re=d2nQG=22@0135@12500102=87500(2),NP]90b:NP]90b=ARe+B1000+112Re01661000+312Re0166p@HD0135+bDsin112H=2387500+119@1000+112@8750001661000+312@8750001661117@31571013965@1112=1129(2)45bNP]45bNP]45b=23Re+119@1000+112Re01661000+312Re01661117@31571013965@sin11245b=0185112008(2)(3)30bNP]30bNP]30b=23Re+119@1000+112Re01661000+312Re01661117@31571013965@sin11230b=015621314全挡板条件下搅拌功率数的计算,NPmax(1)90bRec[2]:Rec=25(b/D)dD-0142+b/D0111(b/D-010048)=25010465(01714-014)2+0104650111@(010465-010048)=63115,NPmax90b:NPmax90b=2363115+119@1000+112@6311501661000+312@6311501661117@31571(0135+010465)sin11290b=314(2)(H=45b,30b)ReH[1]ReH=104(1-sinH)Rec(5)H=45bRe45b:Re45b=104(1-sin45b)@63115=937145,H=30bRe30b:Re30b=104(1-sin30b)@63115=6315H=45bH=30b:NPmax45b=23937145+119@1000+112@93714501661000+312@93714501661117@31571(0135+010465)sin11245b=1176NPmax30b=236315+119@1000+112@631501661000+312@631501661117@31571(0135+010465)sin11230b=0193921315部分挡板条件下功率数的计算NPmaxNP][1]:NPmax-NPNPmax-NP]=1-219@WbD112nb2(6)(1)90bNP90b(6),90bNP:314-NP90b314-1129=1-219@0123218112@42=01178(7):NP90b=3102(2)45bNP45b1176-NP45b1176-0185=1-219@0123218112@42=01178:NP45b=1160(3)30bNP30b01939-NP30b01939-0156=1-219@0123218112@42=01178:NP30b=0187214(1),:(1)H=90bP90bP90b=NP90bQn3d5=3102@1250@01353@25=5179W(2)H=45bP45bP45b=NP45bQn3d5=1160@1250@01353@25=2744W(3)H=30bP30bP30b=NP30bQn3d5=0187@1250@01353@25=1492W3,22,,,2Table2CalculationresultsHReHNPmaxNP]NPP/W90b6311531411293102517945b937145117601851160274430b631501939015601871492,,45b(下转第18页)122008(2)215,,,,,216,,217,,,3,(1),,;(2),,,,(3),,,,,,,,,,,,[][1].[M].:,1994.[2]56.()[M].:,1978.^(上接第9页)),;(01589~01030mm),PIK-074P,,PSI-500,,,,,,,,[][1],.[J].,1996,(9):88-91.[2].[J].(),2003(10):30-32.^(上接第12页),118m,,,,715kW,,4,,,,,(CFD),,;,[][1].[M].:,2000.[2].[M].:,2004.^182008(2)