上海理工大学学报
上海理工大學學報
상해리공대학학보
2014年
5期
456-460,468
,共6页
胡磊%袁益超%李立军%咸哲龙%梁旭彪
鬍磊%袁益超%李立軍%鹹哲龍%樑旭彪
호뢰%원익초%리립군%함철룡%량욱표
双水内冷汽轮发电机%定子铁心%过热%数值分析
雙水內冷汽輪髮電機%定子鐵心%過熱%數值分析
쌍수내랭기륜발전궤%정자철심%과열%수치분석
double water inner cooled turbo generator%stator core%overheat%numerical analysis
针对某电厂300 MW 双水内冷汽轮发电机实际运行中出现的汽、励两端铁心温度不均衡,且端部几档铁心存在过热的问题,采用二维数值模拟的方式,研究其铁心及端部铁心内的空气流动特性。结果表明,过热铁心档相邻的冷却通道流量较小可能是上述问题的主要原因。提出增加挡风板高度的措施,使端部铁心过热问题得到有效解决,电厂随后实际运行数据验证了该措施的可靠性,为双水内冷系列汽轮发电机的增容改造及优化设计提供一定的参考依据。
針對某電廠300 MW 雙水內冷汽輪髮電機實際運行中齣現的汽、勵兩耑鐵心溫度不均衡,且耑部幾檔鐵心存在過熱的問題,採用二維數值模擬的方式,研究其鐵心及耑部鐵心內的空氣流動特性。結果錶明,過熱鐵心檔相鄰的冷卻通道流量較小可能是上述問題的主要原因。提齣增加擋風闆高度的措施,使耑部鐵心過熱問題得到有效解決,電廠隨後實際運行數據驗證瞭該措施的可靠性,為雙水內冷繫列汽輪髮電機的增容改造及優化設計提供一定的參攷依據。
침대모전엄300 MW 쌍수내랭기륜발전궤실제운행중출현적기、려량단철심온도불균형,차단부궤당철심존재과열적문제,채용이유수치모의적방식,연구기철심급단부철심내적공기류동특성。결과표명,과열철심당상린적냉각통도류량교소가능시상술문제적주요원인。제출증가당풍판고도적조시,사단부철심과열문제득도유효해결,전엄수후실제운행수거험증료해조시적가고성,위쌍수내랭계렬기륜발전궤적증용개조급우화설계제공일정적삼고의거。
Based on the operation data collected from a certain power plant,it is found that the temperature distribution on stator core between turbine end and exciter end is quite nonuniform, furthermore,there exists some overheated step core in the step iron.By means of numerical analysis,it is found that the volume flow of radial vent channel beside the overheated step core is quite low compared with other adjacent radial vents.The overheat problem was resolved by increasing the height of the baffle locating in the inner step iron,and the test data support the above measure.Some useful conclusions were given for the future optimum design and unit capacity enlargement.