回转式空气预热器柔性密封片摩擦功率计算分析  

Calculation and Analysis for Friction Power of Flexible Seals in Rotary Air Preheaters

作　　者：李虎[1] 朱卫平[1] 祝雷渊 李世强[3] 顾义 

机构地区：[1]上海大学上海市应用数学和力学研究所,上海市闸北区200072 [2]上海上电漕泾发电有限公司,上海市金山区201507 [3]上海大学上海市力学在能源工程中的应用重点实验室,上海市闸北区200072 [4]上海尚甸电站设备有限公司,上海市奉贤区201499

出　　处：《中国电机工程学报》2013年第14期93-100,3,共8页Proceedings of the CSEE

基　　金：上海市重点学科建设项目资助课题(S30106)~~

摘　　要：回转式空气预热器(空预器)是电站锅炉系统中的重要辅机之一,柔性密封是克服该设备高漏风率缺陷的主要手段。柔性密封片引起的功率损耗(摩擦功率)是评价柔性密封改造工程可行性的重要条件,但目前的估算缺乏理论依据,大多只凭经验进行,这无疑增加了设备运行的风险和不确定性。从应用力学角度出发,分析了柔性密封片的运行及受力情况,推导出3个不同方向的柔性密封片摩擦功率计算公式,最后考虑结构大变形和材料非线性,通过有限元软件ANSYS给出了摩擦功率的典型算例,为电站锅炉回转式空气预热器柔性密封改造及新型柔性密封片的研发提供参考。Flexible seal is being used to reduce the air leakage rate of the rotary air preheater （RAPH） in power plant boiler system. The consumed power of the flexible seal friction is one of the assessment criteria of the seal renovation project. However, there has been no unified theory to estimate the friction power yet, which will raise the risk and the uncertainty of the operation. The performances and the loading conditions of the flexible seals were firstly examined in the viewpoint of applied mechanics, and the flexible seal friction powers were generally formulated. As an example, a new flexible seal and a real RAPH were introduced to the calculation and analysis, in which frictions were calculated by using the finite element analysis software ANSYS, and the large displacements of the structure and the elastoplastic properties of the material were considered. The research results provide a reference to the flexible seal design and the renovation project of the rotary air preheater in power plant.

关 键 词：回转式空气预热器 柔性密封 摩擦功率 有限元分析 ANSYS 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]