中国机械工程 ›› 2014, Vol. 25 ›› Issue (14): 1847-1851.

• 机械基础工程 • 上一篇    下一篇

整体叶盘电解加工移动密封阴极设计与试验

刘嘉;朱栋;万龙凯;朱荻   

  1. 南京航空航天大学,南京,210016
  • 出版日期:2014-07-25 发布日期:2014-08-25
  • 基金资助:
    国家自然科学基金资助项目(51205199);江苏省自然科学基金资助项目(BK2012387) 

Design and Experiments of Slip Seal Structure Cathode in ECM of Blisk

Liu Jia;Zhu Dong;Wan Longkai;Zhu Di   

  1. Nanjing University of Aeronautics and Astronautics,Nanjing,210016
  • Online:2014-07-25 Published:2014-08-25
  • Supported by:
    National Natural Science Foundation of China(No. 51205199);Jiangsu Provincial Natural Science Foundation of China(No. BK2012387)

摘要:

在整体叶盘的电解加工中,叶间区域易发生加工意外。通过有限元流场分析发现该区域存在过流面积突变。为了改善该区域流场,设计了一种消除过流面积突变的移动密封阴极结构。改进流场的有限元分析结果表明,移动密封阴极结构显著提升了电解液流场的稳定性。移动密封阴极的电解加工试验结果表明,新型阴极显著提升了加工稳定性,试验件具有较好的加工重复性与表面质量。

关键词: 电解加工, 整体叶盘, 阴极设计, 流场

Abstract:

On the area of blade tip, it is easy to have processing accident in ECM blisk. By using finite element method, the flow field of processing areas was analyzed. The results reveal that the change of sectional area in blade tip is significant.
In order to improve the flow field stability in blade tip area, a new slip seal structure cathode was proposed. The flow field with slip seal structure cathode was analyzed by finite element method. The results reveal that flow field stability in blade tip area is enhanced obviously. The continuous processing experiments about blades was carried out to evaluate  the processing stability of slip seal structure cathode. The results show that the processing stability is improved significantly. The test specimens have batter processing repeatability and surface quality.

Key words: electrochemical machining(ECM), blisk, cathode design, flow field

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