...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering failure analysis >Failure analysis of the 350 MW steam turbine blade root
【24h】

Failure analysis of the 350 MW steam turbine blade root

机译：350MW汽轮机叶片根部故障分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents an analysis of the cause of fracture in a steam turbine blade root. During the maintenance of a steam turbine, several L-2 blade roots with crack were encountered. In this work a visual inspection was combined with a revision of the turbine operation history. A turbine flow analysis was realized together with verification of the blade root dimensions and tolerances. Also, a finite-element analysis (FEA) of the blade group was carried out to calculate the natural frequencies. In the analysis, dynamic and static steam forces were calculated for the determination of the blade root stresses with mismatch in different contact areas. Finally, a fractography analysis on the root crack surfaces was realized. The results show that improper mismatch between the contact areas of the blade root and rotor fastening tree was the main cause of blade root fracture.
机译：本文对汽轮机叶片根部断裂的原因进行了分析。在汽轮机维护期间，遇到了多个带有裂纹的L-2叶片根部。在这项工作中，目视检查与涡轮机运行历史的修订相结合。实现了涡轮机流量分析以及叶片根部尺寸和公差的验证。另外，对叶片组进行了有限元分析（FEA）以计算固有频率。在分析中，计算了动态和静态蒸汽力，以确定在不同接触区域中不匹配的叶片根部应力。最后，对根部裂纹表面进行了形貌分析。结果表明，叶根与转子紧固树接触面积的不匹配是叶根断裂的主要原因。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号