锅炉汽包接管断裂失效分析

X(),,,TQ05518+1B025426094(2004)0420234205,,1t2m1,11,DN150mm:DN150mm,DN150mm,168mm7mm250mm,DN150mm,DN150mmPN10MPa,HF2CA48Y2100CDN200mm,()90,,902.5m:4.48MPa16Mn168mm7mm250200mm1250mm(2)30mm,,15mm(3),:4322004X,,19574,,2130162132a.,,45,4.17MPab.,,8.4mm,5.5mmc.JB4726d.HB113152,JB4726e.+,,f.,3,,,,:3.1GB150,PN10MPa,16Mn,,,5.5mm,7mm,,,4.09MPa0.5min,,0.5min,,4.09MPa,,4.17MPa,,(,)z()GB15021998[1]:z=27.4MPanbb,b450MPa4.17MPa,5.5mm,()()16Mn,,3.2,,,,53231430MPa,4.09MPa4.17MPa,,,(30MPa)3.3250,1;,;,;,,,16Mn,,9,944.06MPa4.17MPa,,290,90,3,,(,,),()4.1[2],:Q=5.25K1Apd=127103kg/h=35kg/spd=1.03ps+0.1=4.395MPa,ps,ps=4.17MPa();A,A=(/4)1002=750mm2;K1,K1=0.74.2[3]pcWc:Wc=2Kp1V1K+1103=503.7m/spc=Q103A32p2V1K(K+1)=0.497MPaA3,A3=20023.14/4=3100mm2;p1(),p1=4.17+0.1=4.27MPa;V1,V1=(22.4/M)p0T1/(p1T0)=0.056m3/kg;p0T0;K,K=1.13;M,M=18,,p3,W3:p3=pc=0.497MPa,W3=Wc=159m/s4.3[3]:F3=QW3+(p3-p0)A3=3095N4.4[4]1,,80mm8mm500mm4,63220044F34y,ya1a2,:a1=(S2/S1)a2=(130/339)(500-a1)a2=500-a1=371mma1=129mmS1,S1=339mm2;S2,S2=130mm24,A1yIy,A1:Iy,A1=(/64)(d04-di4)=1.149107mm4di,di=154mm;d0,d0=168mmA2yIy,A2:Iy,A2=73400mm4ywy:wy=(Iy,A1+Iy,A2)/xmax=14534mm34.5,L3=200mmyMy:My=F3L3=7.52107Nmm=MyWy=51617MPaGB15021998[4]16Mnb=450MPa,[5]16Mn200b515MPa,250b515MPa,:b,,,DLF[3],:DLF=1.12,tT(t/T),:DLF=111,:d1.1=568MPab[6][7],,,,,5,,,,,,,,732314,,,,,,,,,2m,,,90,,9090,,,6,,,,,90,,90,,,21GB1502199812..:,19993,..:,200241.:,19975,..:,199861.:,19917..:,19868..1981(:2004205217)RuptureFailureAnalysisoftheSteamTankNozzlesofaBoilerWEIAnan(JiangsuPolytechnicUniversity,Changzhou,213016,Jiangsu,China)AbstractAcomprehensiveanalysiswasmadeoftherupturefailurecausesofthenozzlesconnectingthetubesofthesafetyvalveinthesteamtankofaboiler.Itwasfoundthatthefundamentalrupturereasonwasthatthedesignoftheoutletdirectionofthedischargeductofthesafetyvalvewasunreasonableafterdispos2ingofmanypossiblefactors,andsomeimprovementmethodswereproposed.KeywordsSteamTank,Nozzle,FailureAnalysis8322004