宁夏电力
寧夏電力
저하전력
Ningxia Electric Power
2015年
4期
60-63,68
,共5页
汽动给水泵%汽轮机%水冲击%轴向位移
汽動給水泵%汽輪機%水遲擊%軸嚮位移
기동급수빙%기륜궤%수충격%축향위이
steam feed pump%steam turbine%water induction%axial displacement
针对宁东热电厂2号机组A、B汽动给水泵汽轮机轴向位移增大的问题,对事故原因进行分析,提出改进方法及预防措施.分析结果表明:转子轴向位移增大的主要原因是除氧器低温饱和蒸汽进入汽动给水泵汽轮机,造成了汽动给水泵汽轮机动叶受到水冲击,转子轴向推力增大,进而使得推力瓦块烧损,汽封齿磨损,轴向位移保护动作,引发给水泵汽轮机跳闸.
針對寧東熱電廠2號機組A、B汽動給水泵汽輪機軸嚮位移增大的問題,對事故原因進行分析,提齣改進方法及預防措施.分析結果錶明:轉子軸嚮位移增大的主要原因是除氧器低溫飽和蒸汽進入汽動給水泵汽輪機,造成瞭汽動給水泵汽輪機動葉受到水遲擊,轉子軸嚮推力增大,進而使得推力瓦塊燒損,汽封齒磨損,軸嚮位移保護動作,引髮給水泵汽輪機跳閘.
침대저동열전엄2호궤조A、B기동급수빙기륜궤축향위이증대적문제,대사고원인진행분석,제출개진방법급예방조시.분석결과표명:전자축향위이증대적주요원인시제양기저온포화증기진입기동급수빙기륜궤,조성료기동급수빙기륜궤동협수도수충격,전자축향추력증대,진이사득추력와괴소손,기봉치마손,축향위이보호동작,인발급수빙기륜궤도갑.
Analyzes the problem of axial displacement augmentation for A and B steam feed pump steam turbine of No.2 unit in Ningdong thermal power plant,analyzes the cause factor of failure, puts forward improvement method and preventing measure. the analysis result shows that the main cause of rotor axial displacement augmentation is that low temperature saturation steam of deaerator come into turbine of steam feed pump and result in moving blade of turbine of steam feed pump to bring water induction and induce rotor axial thrust augmentation,further burn-out thrust bearing shoe,abrasion seal gear,axial displacement protection device to act,so caused turbine of steam feed pump to trip.
