CAUSE ANALYSIS AND REMEDICAL MEASURES OF LARGER DIFFERENTIAL EXPANSION FOR UNIT NO.4 IN HUANGTAI POWER PLANT[J]. Thermal power generation, 2003, (7): 49-51.
DOI:
CAUSE ANALYSIS AND REMEDICAL MEASURES OF LARGER DIFFERENTIAL EXPANSION FOR UNIT NO.4 IN HUANGTAI POWER PLANT[J]. Thermal power generation, 2003, (7): 49-51. DOI: 10.19666/j.rlfd.2003.07.016.
CAUSE ANALYSIS AND REMEDICAL MEASURES OF LARGER DIFFERENTIAL EXPANSION FOR UNIT NO.4 IN HUANGTAI POWER PLANT
摘要
通过分析认为级间蒸汽泄漏和前轴封漏汽的窜流是造成汽轮机负胀差大的主要原因
经采取用金属修补剂对 5、6号隔极套和与之相配合的汽缸洼窝进行修补
并研磨找平
以及消除轴封间隙的不均匀等措施减轻蒸汽的泄漏和窜流
取得了明显效果
Abstract
Through analysis
it is considered that the main causes resulting in larger differential expansion of a turbine unit are the interstage steam leakage and the fled flow of front shaft-packing’s leakage steam. Hence
some remedical measures for reducing steam leakage and fled flow have been taken
namely using metallic mending compound to mend sleeves of diaphragms NO.5 and 6
as well as depresion slots matched with them in the steam casing
grinding and aligning
and eliminating the non-uniformity of shaft-packing’s clearance etc.