基于有限元的轴流式水轮机转轮体刚强度分析  

RIGIDITY/STRENGTH ANALYSIS OF THE AXIAL FLOW RUNNER HUB BASED ON FEM

作　　者：郑小波[1] 罗兴锜[1] 郭鹏程[1] 邬海军[1] 

机构地区：[1]西安理工大学水利水电学院,西安710048

出　　处：《机械工程学报》2006年第10期215-218,共4页Journal of Mechanical Engineering

基　　金：国家自然科学基金(90410019);教育部高等学校博士点专项基金(20040700009);陕西省教育厅专项科研计划基金(05JK264)资助项目。

摘　　要：针对轴流式水轮机,因其转轮体的结构及受力情况的复杂性,进行精确的刚强度计算是相当困难的。为了研究轴流式水轮机转轮体在工作状态下的应力状态及位移情况,采用周期性边界条件,选取包含一个完整枢轴孔在内的扇形区域作为分析模型,对弹性体结构的动力平衡方程,采用三维有限元技术进行求解,分别对额定工况、最大水头工况和两种飞逸工况下的轴流式水轮机转轮体进行了刚强度分析。结果表明:轴流式水轮机转轮体在运行时,飞逸工况下的应力水平要远远大于正常运行工况下的应力水平;转轮体的最大位移及最大应力点位于大枢轴孔的下端处,与实际转轮体最大应力位置一致,同时也说明了该方法的有效性。Because of complicated structure and load condition, accurate rigidity/strength analysis of the runner hub is difficult to the axial flow water turbine. To study the stress and displacement distribution of the axial flow runner hub in operation, the rigidity/strength analysis is conducted by using FEM based on dynamic equations of elastic structure and periodic boundary condition. One sector including whole pintle hole is selected as computation model. Two operation points including rating points, maximum head points and two running away points are taken into account. According to the result, the maximal stress of the hub on the running away point is larger far and away than that on the normal points. The maximal stress and distortion lie the lower part of the big pintle hole, which accord with the fact And the result shows that the method used is effective

关 键 词：有限元法 转轮体 刚强度 

分 类 号：TK730[交通运输工程—轮机工程]