引进型300MW汽轮机低压内缸中分面泄漏的分析  

Analysis for Low Pressure Inner Cylinder Casing Split Leakage of 300MW Imported Type Steam Turbine

作　　者：杨小琨[1] 李建刚[1] 李丽萍[1] 

机构地区：[1]郑州电力高等专科学校,郑州45004

出　　处：《汽轮机技术》2010年第5期381-383,共3页Turbine Technology

摘　　要：某电厂3台引进型300MW汽轮机,均存在五、六段抽汽温度偏高的问题。通过对试验数据和低压内缸结构的分析,确定是由于低压1号内缸中分面漏汽造成的。分析了造成低压1号内缸中分面张口变形的主要原因并给出技术对策,利用等效热降局部简化算法计算了这部分漏汽引起的机组效率的变化。Over high extraction temperature of section 5 and section 6 is a universal problem in three 300MW imported type steam turbines of some power plant. Through the analysis for experiment data and structure of low-pressure inner cylinder, the low-pressure No. 1 inner cylinder steam leakage is judged as the main cause. The main cause of low-pressure No. 1 inner cylinder casing split gaping and deformation is analysed, some technical measures are supplied. The change of unit efficiency caused by steam leakage is calculated by using the local simplified algorithm of equivalent heat drop method.

关 键 词：抽汽温度 低压内缸 中分面 漏汽 等效热降 

分 类 号：TK263[动力工程及工程热物理—动力机械及工程]