600MW火电机组用循环水泵改型设计.pdfVIP

第26卷第1期 排 灌 机 械 Vo1．26 No．1 2008年1月 Drainage and Irrigation Machinery Jan．2008 600 MW火电机组用循环水泵改型设计 伍春花 ，管荣国 (1．湖南湘电长沙水泵厂有限公司，湖南长沙410015；2．江苏大学流体机械工程技术研究中心，江苏镇江212013) 摘 要：介绍了600 MW火电机组用大型立式循环水泵的一种改型设计方法，即针对同一模型，叶 轮与导叶体采用不同的换算系数进行设计．以天津盘山电厂一期2×600 MW及成都金堂电厂一期 2×600 MW循环水泵设计为例，分别采用常规设计和改型设计方法进行了设计．详细说明了设计 方法、设计要点及理论和实测性能曲线等．结果表明，当叶轮与导叶的换算系数相差在3％的范围， 且叶轮与导叶体结合部位能够光滑过渡的情况下，用大叶轮配小导叶进行相似换算与叶轮及导叶 体采用同一换算系数所测得的性能可以与模型泵性能相一致． 关键词：循环泵；叶轮；导叶；换算系数；改型设计；性能对比；发电厂 中图分类号：TH313 文献标志码：A 文章编号：1005—6254(2008)01—0040—03 Remodeling design on circulating pump of 600 MW power unit WU Chun．hua ，GUAN Rong．guo (1．Hunan XD Changsha Pump Works Co．Ltd．，Changsha，Hunan 410015，China；2．Technical and Research Center of Fluid Machinery Engineering，Jiangsu University，Zhenjiang，Jiangsu 212013，China) Abstract：A remodeling design of circulating pump of 600 MW power unit is introduced which adopts dif- ferent conversion factors for the impeller and guide blade according to the same model pump．General de· sign was used by taking two circulating pumps of 600 MW Panshan power plant of Tianjin，and two circu· lating pumps of 600 MW Jingtang power plant of Chengdu as examples．Design methods and design points were detailed from theoretical and experimental points of view．The results indicate that，adopting either different or the same conversion factors to design the impeller and the guide blade，the same property as the model pump is obtained if the difference between the conversion factor of the impeller and that of the guide blade was below 3％ and the combined part transition between the impeller and the guide blade can be slippery． Key words：circulating pump；impeller；guide blade；conversion factor；remodelin