消失模与V法铸造用真空泵的选型和负压罐的计算

©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:2009202211:(19862),,.:VCAD/CAM.Email:[e-mail].30No.3Mar.2009FOUNDRYTECHNOLOGYTechnologyandEquipmentforSpecialCastingProcessV,(,430074):,V,,:3.75,1.31.5:;;;;V:TG249.6:A:100028365(2009)0320385203SelectionofVacuumPumpandCapacityCalculationofDustSeparatorinLostFoamandV2processCastingQINShao2wei,YESheng2ping(NationalKeyLaboratoryofMaterialProcessingandDieandMouldTechnologyHuazhongUniversityofScienceandTechnology,Wuhan430074,China)Abstract:Thispaperaimstostudytheexistentproblemsofvacuumsystemsindomesticfoundriesthroughspotinspectionsandtheoreticalcalculationbasedonhydromechanics.Also,principlesforvacuumpumpselectionandreasonablemethodsforcalculatingthecapacityofdustseparatorsaregiven.Generally,theamountofpumpcapacityshouldbeabout3.75timesthetotalvolumeofallflasks;whilecapacityofthedustseparatorisapproximately1.31.5timesthatofallflasks.Keywords:Vacuumsystem;VacuumPump;Dustseparator;LostFoamCasting;V2processCastingV,,,,:,,,,12VV(1),,;(2);;1Fig.1AvacuumsystemofcertainfoundryinHubeiprovince(3),,;,,1,,583©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1)1,,S,V(2),P,:t=VSlnP0P(1)tP0P,H.A.Steinherz1,(105Pa)133Pa,K=1.1[1]:(1),St,:S=1.1VtlnP0P(2),V,AFS,30%V0.3V(2)P0101.3kPa,P,40kPa,,510s,,6s,0.1min:S=1.10.3V0.1minln7603003V(3)325%,S=3.75V,,,,,,1,[2]1[2]Tab.1Pumpcapacityvs.volumeofflask/m/(m3/min)/kg3000900450/3003.04.045099025001400580/2703.04.01200264018001500550/5502.53.035077020001600180/1801.82.513028616001600300/3001.82.510022013801380570/3501.31.8100220(3):SK2BESK,2BE23SK2BE,2SKTab.2ParametersofSKvacuumpump/(m3/min)11054104/Pa/kW/(r/min)/kgSK2332.881035.51450320SK2665.4710311970460SK2121211710318.5970750SK22020187103377401700SK22525242104404201900SK22727252102454902000SK230302721025574023002BESK,,,2BESK,,,,2BESK(2BE2523030kW,SK23037kW)2;683©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:V32BETab.3Parametersof2BEvacuumpump/hPa/(r/min)/(m3/min)/kW/kg2BE202337909.518.58508801118.5850980122292511001430945117015309452BE2033379014309958801630995980183710651100204510851170214510852BE252335582030146066025371515740284516938203055164588033751805,4V1,V2,:P1,;P2,,V1V2P3,,,:4Fig.4ModelforcalculatingcapacitiesofdustseparatorsV1P1+V2P2=P3(V1+V2)(4)P3,,67kPa;P140kPa;P2101kPa,V1(1.31.5)V2,V23,(1)3.75(2)(1.31.5)[1].[M].:,1986.[2],.V[M].V(),2008.783