330MW汽轮机叶顶汽封间隙优化及经济性分析  

330 MW Steam Turbine Tip Clearance of Gland Seal Optimization and Its Thermal Economic Analysis

作　　者：孙启德[1] 焦利峰[2] 解志宏[2] 

机构地区：[1]北方联合电力有限责任公司,内蒙古呼和浩特010020 [2]北方联合电力有限责任公司达拉特发电厂,内蒙古达拉特014300

出　　处：《内蒙古电力技术》2012年第6期82-84,共3页Inner Mongolia Electric Power

摘　　要：北方联合电力有限责任公司达拉特发电厂2号、4号、5号汽轮机组经多年运行后,汽轮机缸内漏汽损失大、汽缸效率下降、热耗率高。通过对间隙超标的高、中压缸叶顶汽封阻汽片进行更换,优化叶顶汽封设计间隙等工作,高、中压缸效率效率分别提高3%和2.3%,热耗率平均降低约80 kJ/kWh,机组经济性得到提高。Dalate Power Plant No.2, No.4 and No.5 turbine units had run for many years, sxisting cylinder leakage loss higher, cylinder efficiency dropping, high rate of heat consumption. Based on replacement of steam blocking plate on the leaves top seal which the clearance exceed in the high pressure cylinder and medium pressure cylinder, optimization of the top seal design clearance, high and medium pressure cylinders efficiency were improved by about 3% and 2.3%, and the heat consumption rate reducing averaging about 80 kJ/kWh, the economical efficiency of the units were imnroved.

关 键 词：330MW汽轮机 叶顶汽封 间隙优化 汽缸效率 热耗率 

分 类 号：TM621.3[电气工程—电力系统及自动化]