负荷变化对真空严密性的影响及其修正  

Influence of Load Change on Vacuum Tightness in Steam Turbine and its Correction

作　　者：旷仲和 KUANG Zhonghe(Huaneng Power International Limited Haimen Power Station,Shantou 515000,China)

机构地区：[1]华能国际电力股份有限公司广东分公司海门电厂

出　　处：《热力透平》2020年第1期63-68,共6页Thermal Turbine

摘　　要：分析了汽轮机变负荷工况下真空严密性的变化特性,根据该特性创立了负荷偏离规定值时对真空严密性进行修正的方法,并分析其修正的必要性。应用该修正方法,可以把偏离负荷规定值的真空严密性修正到设计状态,在负荷偏离规定值时,能够计算其对真空严密性试验值影响值,避免误判断。研究成果为不同负荷工况对真空严密性的影响提供了修正计算方法,以利于提高真空严密性试验值计算的准确性。The influence of load change on vacuum tightness in steam turbine is analyzed,and the correction method of vacuum tightness under off-design load is established correspondingly.Meanwhile,the necessity of correction is also analyzed.With this method adopted,the vacuum tightness under off-design load can be corrected to the condition of design.The influence of off-design load on the test value of vacuum tightness can be calculated to avoid misjudgment.The research result can provide correction algorithm for the influence of load change on vacuum tightness and improve its calculation accuracy.

关 键 词：汽轮机负荷 真空严密性 凝汽器吸收的热量 漏气量 背压 修正系数 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]