毕业设计论文汽轮机叶片振动与分析.doc

摘 要 电力工业为国民经济各个领域和部门提供电能，它的发展直接影响着工农业建设的速度。为了确保实现机组的长期“安全、经济、满发”这一综合质量要求，近年来人们对叶片的振动进行了广泛深入的研究。 本论文着重阐述了汽轮机叶片的型线部分受力计算方法和避免叶片共振的措施。介绍了汽轮机叶片的结构形式、叶片受力分析的方法。介绍了叶片振动产生的原因、机理和振动类型。在叶片受力分析之后，提出叶片振动频率的计算方法。在介绍了叶片的振动特性和调频安全准则后，提出避免叶片产生共振的措施和建议。介绍了叶片静频率和动频率的实测方法并且对目前比较先进的实时监测仪器作了简单的介绍和对比分析。 在大量收集资料和阅读相关文章的过程中，对汽轮机叶片振动产生的原因、机理以及类型有了深刻的了解，完成毕业论文。 关键词：汽轮机；叶片；振动 Abstract The electric power industry provides the electrical energy for national economy each domain and the department, its development is affecting the industry and agriculture construction speed directly. In order to guarantee the realization unit long-term “the security, the economy, completely sends” this comprehensive quality requirement, in recent years the people have conducted the widespread thorough research to leaf blades vibration. The present paper elaborated emphatically the steam turbine leaf blade the line partial stress computational method and avoids leaf blade resonating the measure. Introduced the steam turbine leaf blades structural style, the leaf blade stress analysis method. Introduced the leaf blade vibration produces reason, mechanism and vibration type. After leaf blade stress analysis, proposes the leaf blade vibration frequency computational method. After introduced leaf blades vibration characteristic and the frequency modulation security criterion, proposed avoids the leaf blade having the resonating measure and the suggestion. Introduced and the leaf blade static frequency and moved the frequency the actual method to make the simple introduction and the contrast analysis to the present quite advanced real-time monitor instrument. In the massive data collection and in the reading thread process, the reason, the mechanism as well as the type which produced to the steam turbine leaf blade vibration had the profound understanding, completed the graduation thesis. Key word: Turbine; Leaf blade; Vibration 目 录 引 言 1 第一章 叶片受力分析 3 1.1 叶片的结构形式 3 1.1.1叶片型线部分 3 1.1.2动叶叶根 4 1.1.3动叶顶部 5 1.2 叶片的连接