Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Study of the Dynamic Characteristics of a High-Pressure Labyrinth Seal Considering Rotor Whirling

회전체 Whirl 운동을 고려한 고압용 래비린스 씰의 동적 특성에 관한 연구

  • Kim, Chae Sil (School of Mechanical Engineering, Changwon National University) ;
  • Lee, Kyung Jin (Steam Turbine Engineering Team 3, Doosan Heavy Industries & Construction) ;
  • Shin, Min Jae (Vibration Durability Research Center, Changwon National University)
  • 김재실 (창원대학교 기계공학부) ;
  • 이경진 (두산중공업(주) 증기터빈설계3팀) ;
  • 신민재 (창원대학교 진동내구성연구센터)
  • Received : 2015.06.29
  • Accepted : 2015.07.16
  • Published : 2015.08.01
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Abstract

This article describes the calculation procedure for the dynamic characteristics of a high-pressure labyrinth seal wherein the friction force and rotor whirling force are considered; SFCP, the commercial code developed by Lee and two colleagues, is used in the procedure. The simulation results were reviewed in comparison to those of the experiments provided by Benckert; additionally, the SFCP simulation results were verified using the CFD analysis presented by Toshio Hirano. This calculation procedure may therefore be applied to the dynamic characteristics of the labyrinth seals of high-pressure turbo machinery.

Keywords

References

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  3. Benckert, H. and Wachter, T., "Flow Induced Spring Constants of Labyrinth Seals," Proc. of the Workshop on Rotordynamic Instability Problems in High- Performance Turbomachinery, pp. 189-212, 1980.
  4. Ahn, J. H., Hur, J.-H., Moon, S.-J., Lee, J.-H., and Yoo, H., "Reduction of Leakage through Labyrinth Seal in a Steam Turbine by Modification of the Teeth Shape," Proc. of the SAREK Summer Conference, pp. 857-862, 2009.
  5. Hur, J.-H., Ahn, J.-H., Park, J.-G., Moon, S.-J., Lee, J.-H., et al., "Analysis of Leakage through Labyrinth Seal in a Steam Trubine Due to Modification the Teeth Angle," Proc. of the SAREK Winter Conference, pp. 313-318, 2009.
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  7. Hirano, T., Guo, Z., and Kirk, R. G., "Application of CFD Analysis for Rotating Machinery: Part 2- Labyrinth Seal Analysis," Proc. of the ASME Turbo Expo, International Joint Power Generation Conference, pp. 661-667, 2003.
  8. Lee, K. J., "A Study on the Dynamic Coefficient of Labyrinth Seals in a High Pressure Steam Turbine," M.Sc. Thesis, Department of Mechanical Engineering, Changwon National University, 2009.

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