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时间:2017-12-08
《变汽温试验参数对高中压缸间轴封漏汽量计算影响分析》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第58卷第1期汽轮机技术V01.58No.12016年2月TURBINETECHNOLOGYFeb.2016变汽温试验参数对高中压缸间轴封漏汽量计算的影响分析王学栋,王昭鑫,马晓红,骆祥龙(1华电电力科学研究院山东分院,济南250014;2国网山东省电力公司,济南250001;3积成电子股份有限公司,济南250100)摘要:针对亚临界330MW机组和超临界660MW机组,研究了高中压缸问轴封漏汽量计算值与变汽温试验参数的关系。对于亚临界33OMW机组,试验时主汽温和再热汽温的温差不同,高中压缸间轴封漏汽量占主蒸汽流量的百分比从O.49%
2、到2.42%,实际中压缸效率从89.89%到90.41%;对超I临界660MW机组,高中压缸问轴封漏汽量占主蒸汽流量的百分比从0.81%到1.53%,实际中压缸效率从88.79%到89.26%;随着轴封漏汽量增大,实际中压缸效率降低。亚临界330MW机组,由于试验时温差较小,不同的工况组合,实际中压缸效率和高中压缸间轴封漏汽量变化较大;两种容量的机组,降低主汽温度工况和额定参数工况组合,得到的轴封漏汽量都偏差较大。通过计算轴封间隙通流能力,以及对比设计值和试验结果,确认变汽温工况试验时,主汽温度和再热汽温度的试验温差应该达到15~C以上
3、,才能得到较为准确的高中压缸间轴封漏汽量和实际中压缸效率。关键词:汽轮机;轴封漏汽;平衡盘汽封;变汽温试验;试验参数分类号:TK262文献标识码:A文章编号:1001-5884(2016)01-0050-05ImpactanditsAnalysisofExperimentParametersofVariableSteamTemperatureExperimentonIntermediateShaftSealSteamLeakagecalculation—WANGXue—dong,WANGZhao-xin,MAXiao—hong2LUOX
4、iang-long3,(1ShandongBranchofHuadianElectricPowerResearchInstitute,Jinan250014,China;2ShandongElectricPowerCompanyofStateGrid,Jinan250001,China;3JichengElectricLtd.Company,Jinan250100,China)Abstract:For330MWsubcriticalunitand660MWsupereriticalunit,therelationshipisstudie
5、dbetweenshaftsealsteamleakagecalculationvalueandthevariablesteamtemperatureexperimentparameters,andtheshaftsealsteamleakagehappensbetweenhighpressure(HP)andintermediatepressure(IP)cylindersofsteamturbine.For330MWsubcriticalunitontheexperimentcaseofvariabletemperaturediff
6、erencebetweenmainsteam(MS)andreheatsteam(RS),theshaftsealsteamleakagepercentageofmainsteamflowisfrom0.49%to2.42%,andtherealpercentageofIPcylinderefficiencyisfrom89.89%to90.41%.Whilefor660MWsupercriticalunit.theshaftsealsteamleakagepercentageofmainsteamflowisfrom0.81%to1.
7、53%.andtherealpercentageofIPcylindereficiencyisfrom88.79%to89.26%.SotheIPcylindereficiencyisreducingwiththeshaftsealleakageincreasing.For330MWsubcriticalunit,actualIPcylindereficiencyandshaftsealsteamleakagevarygreatlyondifferentexperimentcasecombinationsbecausethetemper
8、aturedifferenceissmaller.Forthesetwocapacityunit,thedeviationoftheshaftsealsteamleakageislarger,whichis
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