200MW汽轮机通流改造分析.doc

二 〇 一 三 年 六 月 摘 要 汽轮机是以蒸汽为工质的将热能转变为机械能的大型旋转式原动机，它是火电厂的三大主要设备，其通流部分的运行情况直接决定了火电厂的经济效益。 我国自20世纪80年代后期开始重视和研究汽轮机组技术改造工作经过近0年的发展，围绕提高效率和效益、改善环境、降低成本，各火电厂开始实施旧机组通流部分改造 Abstract Steam turbine as the working substance is heat energy into mechanical energy of large rotating prime mover,It is the main equipment of the three thermal power plants,Part of its flow directly determines the operation of the economic benefits of thermal power plants. China since the late 1980s, starting to focus on technological innovation and research work of Steam Turbine,After nearly 30 years of development,Around efficiency and effectiveness, improve the environment, reduce the cost of the purpose, the old unit thermal power plant began Flow transformation. This more detailed analysis of the 200MW steam turbine flow passage of a common problem and original design manufacturing defects,Turbine Flow combines the theoretical basis,Presented to 200MW turbine flow part of the transformation measures,Currently, the major steam turbine plant digestion and absorption of more advanced three-dimensional flow technology,The introduction of the latest leaf type, structure, process flow modification ,techniques-Lower part of the energy flow, improve the efficiency of the unit, increasing the unit output.Followed by Huaneng Huaiyin Power Plant Turbine and Fengzhen N200-12.75/535/535 N200-130/535/535 type steam turbine power plant before and after the transformation of the data flow analysis proves the necessity of reform. Keywords:200MW Steam turbine; Flow passage; Transformation Analysis 目 录 第一章 绪 论 1 1.1选题背景 1 1.2选题意义 1 1.3 汽轮机通流改造现状 2 1.3.1国外汽轮机通流部分改造现状 2 1.3.2 国内汽轮机通流部分改造现状 2 1.4 本文的主要内容 3 第二章 汽轮机通流改造的基本理论 4 2.1 汽轮机通流部分 4 2.1.1 静 子 4 2.1.2 转 子 6 2.3 通流部分及其装置的评价指标 8 2.3.1 8 2.3.2 机械效率 8 2.3.3 发电机效率 9 2.3.4 汽轮发电机组的相对电效率 9 2.3.5 汽轮发电机组的绝对电效率 9 2.3.6汽轮机的汽耗 9 2.3. 10 第三章 200MW汽轮机通流部分存在的问题 12 3.1通流部分结构不合理 12 3.2 通流部分损失大 13 第四章 汽轮机改造措施及效果分析 15 4.1 汽轮机通流部分改造技术原则 15 4.2 改造目标 15 4.3 通流部分技术改造措施 16 4