Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Development of Flexible Packing Ring in Steam Turbine for Reduction of Leakage by using CFD Flow Analysis

CFD 유동해석을 이용한 누설 저감을 위한 증기터빈용 플렉시블 패킹링 개발

  • Kim, Jin Hyung (School of Mechanical Engineering, Pusan National Univ.) ;
  • Bae, Jun Ho (School of Mechanical Engineering, Pusan National Univ.) ;
  • Lee, Chang-Ryeol (R&D department, POSTECH) ;
  • Kim, Chul (Research Institute of Mechanical Technology, Pusan Nat'l Univ.)
  • Received : 2013.02.28
  • Accepted : 2013.05.24
  • Published : 2013.07.01
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Abstract

A conventional packing ring was designed with a large clearance to prevent damage due to the vibration of the rotor, which can lead to an increase in steam leakage. In this study, a flexible packing ring using winding springs was developed to prevent damage to the rotor teeth by minimizing vibration, while maintaining a smaller clearance than that of conventional rotor designs. Theoretical analysis and finite element analysis (FEA) were used to design the winding spring to satisfy the specified allowable stress limit and minimum load requirements. The shape of the winding spring was designed by applying curves to the center and end parts of a flat spring. Computational fluid dynamics (CFD) analysis was used to predict the leakage of the flexible packing ring. Flow rate measurement tests were performed to verify the leakage reduction efficiency and the reliability of the CFD analysis.

Keywords

References

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