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A Study on Structural Safety Evaluation Technology for Pressing Rings in a Transformer

[+] Author Affiliations
Minok Yun, Jinwoo Lee, YeongCheol Kim

Hyundai Heavy Industries, Yongin, Korea

Paper No. IMECE2016-65246, pp. V009T12A051; 7 pages
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids; NDE, Diagnosis, and Prognosis
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5063-3
  • Copyright © 2016 by ASME


In transformers, pressing rings are used to maintain clamping force on the windings. Recently, the importance of structural safety evaluation on pressing ring design has been growing due to reaction forces from the windings. In this paper, a set of data from mechanical tests is presented. The tests were conducted on insulation materials. Additionally, equations were derived in order to calculate stress and deflection of pressing rings. As a result, the proposed equations of pressing rings were applied in the actual product design. Then, analysis based on numerical method and deflection measurements of real pressing rings were conducted to verify the proposed equations. Through this process, the evaluation technology suggested in this paper was validated.

Copyright © 2016 by ASME
Topics: Safety , Pressing



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