| 卧式布置主汽门关闭特性研究 |
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| 引用本文： | 戴义平,张俊杰,李磊,王志强,高林.卧式布置主汽门关闭特性研究[J].汽轮机技术,2009,51(4). |
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| 作者姓名： | 戴义平 张俊杰 李磊 王志强 高林 |
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| 作者单位： | 1. 西安交通大学叶轮机械研究所,西安,710049
2. 北京国华电力技术研究中心有限公司,北京,065201 |
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| 摘 要： | 某600MW亚临界汽轮机卧式布置主汽门经常发生关闭缓慢、卡涩甚至卡死的故障,严重威胁机组的安全运行和稳定运行.为了确定该类型主汽门关闭故障的原因,对主汽门及其阀杆的受力进行了分析研究,采用高温蠕变理论和有限元分析方法,对主汽门工作时的弯曲变形特性进行了研究,确定了主汽门阀杆弯曲变形与所承受的弯矩以及工作时间的关系.在高温和弯矩作用下,主汽门阀杆必将发生永久性的塑性变形,在主汽门的关闭过程中发生卡涩,提出了主汽门结构改进方法.所做工作对于解决各种卧式布置主汽门的关闭故障具有重要的参考价值.
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| 关 键 词： | 汽轮机 主汽门 门杆卡涩 门杆弯曲 高温蠕变 关闭故障 |
Research on Closure Characteristics of Horizontal Main Stop Valve |
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| DAI Yi-ping,ZHANG Jun-jie,Hi Lei,WANG Zhi-qiang,GAO Lin.Research on Closure Characteristics of Horizontal Main Stop Valve[J].Turbine Technology,2009,51(4). |
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| Authors: | DAI Yi-ping ZHANG Jun-jie Hi Lei WANG Zhi-qiang GAO Lin |
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| Affiliation: | 1 Institute of Turbomachinery;Xi'an Jiaotong University;Xi'an 710049;China;2 Beijing Guohua Electric Power Technology Research Center;Beijing 065201;China |
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| Abstract: | The horizontal main stop valves of a 600WM sub-critical steam turbine frequently moves slowly or jam,or even fail to close.That can seriously threat to the safe and stable operation of generating units.In order to determine the reasons to the close failure,the forces acting on the main stop valve and its lever were analyzed in this paper.The deformation properties were studied by using high temperature creep theory and finite element method.The relationships between the deformation,action torque and the wor... |
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| Keywords: | steam turbine main stop valve jam valve lever bend valve lever high temperature creep close failure |
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