300MW汽轮机再热主汽门轴封漏汽原因及改进

300MW(,432321)[]300MW,,,[];;;[]TK284.1[]B[]100623986(2001)0320020203CauseandImprovementofReheatThrottle-stopValveGlandSealSteamLeakagefor300MWTurbineFENGFang2gao(HanchuanPowerPlant,HanchuanHubei432321,China)Abstract:Inthisarticle,thesteamleakagereasonofreheatthrottle2stopvalveglandsealforthe300MWintroducedsteamturbinewasanalyzedanditsconstructionwasnarrated.Themeasuretosolvethisproblemwasproposedandabetterresultwasobtained.Itisworthytospreadthemeasure.Keywords:reheatthrottle2stopvalve;glandseal;steamleakage;measure11.1300MW,,,,,,,,,,,,11.2,,,;,,:(1)1,[]2001205208[](19682),,,,FF=P1P4D21-P2P4D22F;D1,D2;P1,P242kN,,,,,,(2),20kN,8kN,2kN2,22.10.350.40,,,0225320018Vol.25No.3Aug.2001©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.12.2,,,,2.32.3.1,,,,,,,,,,,;,,,2:(1);(2),,,,2,AST()(),,,,,,AST,,,2.3.2,YG6425,,3,F0F0=P2P4(D21-D22)F0;P2;D1;D22312.614.7MPa,3440kN,,,2.29mm,90,,,,,,,,,33.12000632,1,,2.29mm(),15,,12Vol.25No.3Aug.200125320018©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,1,AST,,,617,,,2,,3.2,,,4(1),(2),,,,(3),(),(4),,300MW,,,,,(15),0mm,(4):YA=0.56.69151026294.4121.48=0.671023m=0.67mmYB=0.56.69151026294.4221.48=2.661023m=2.66mmYC=0.56.69151026294.4321.48=5.991023m=5.99mmYD=0.56.69151026294.4421.48=10.651023m=10.65mmYE=0.56.69151026294.4521.48=16.641023m=16.64mmAE,(4),4,:YA=0.67mm,YB=4.66mmYC=8.65mm,YD=12.65mmYE=16.64mm:B:YB-YB=4.66-2.66=2.00mmC:YC-YC=8.65-5.99=2.66mmD:YD-YD=12.65-10.65=2.00mm,,A0.00mm,B2.00mm,C2.66mm,D2.00mm,E0.00mm,,,,,,,,,,,4,,,,,,,,,,,,,,,2225320018Vol.25No.3Aug.2001©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.