300MW机组轴封间隙改变对机组经济性的影响  

Impacts of Shaft Seal Gap on Economical Efficiency of 300 MW Unit

作　　者：郝玉振[1] 郑威[1] 丁俊齐[1] 王学栋[1] 

机构地区：[1]山东电力集团公司电力科学研究院,山东济南250002

出　　处：《山东电力技术》2013年第3期50-54,共5页Shandong Electric Power

摘　　要：介绍了大型蒸汽轮机常用的轴封类型,以上海汽轮机厂F156型机组为例,在额定工况下通过增加高中压缸轴封间隙0.1mm计算高中压缸轴封漏汽量的改变,并使用等效焓降法定量分析了高中压缸过桥漏汽量、高压缸后轴封漏汽量以及中压缸后轴封漏汽量改变对机组经济性的影响。Different kinds of shaft seal commonly used in large-scale steam turbines and their features were introduced. Based on F156-type unit of Shanghai, the shaft seal leakage was calculated through increasing the shaft seal gap by 0.1 ram. The impacts of the steam leakage of HP-IP shaft seal, front HP shaft seal and rear IP shaft seal on unit economical efficiency were calculated by using equivalent enthalpy drop method.

关 键 词：轴封 轴封间隙 轴封漏汽量 等效焓降 

分 类 号：TK26[动力工程及工程热物理—动力机械及工程]