DOI QR코드

DOI QR Code

An experimental study on influence of wearing seal groove shape to performance of the pump

마모 실 홈 형상이 펌프 성능에 미치는 영향에 관한 실험적 연구

  • Kim, Jun-Ho (R&D 1 Team, R&D Center, Hyosung Goodsprings, Inc.)
  • Received : 2013.12.11
  • Accepted : 2014.01.24
  • Published : 2014.03.31

Abstract

This paper is related to the improvement of efficiency for high performance centrifugal pumps by reducing leakage loss, which is achieved by applying the grooved seal as a non-contact seal to the pumps. Various combinations of grooved seal types, including the spiral and the parallel groove in the rotor and/or in the stator, were tested by the experiment. And the corresponding hydraulic performance and the magnitude of axial thrust were measured and calculated for ten cases. From the results, the type with the spiral groove(spiral angle : $0.98^{\circ}$) in both the rotor and the stator was found to be most effective. In this case, the head and the efficiency were improved from the original design by 2.1% and 2.3% respectively at design capacity($340m^3/h$), and the axial thrust was decreased by 10%.

본 논문은 펌프에서 비접촉식 실로 사용되는 홈 실 적용에 의한 누설 손실을 줄임으로서 고성능 원심펌프의 효율 향상에 관한 것이다. 경사 및 평형 홈 로터와 스테이터의 조합을 포함한 홈 실 형상의 다양한 조합을 실험적으로 연구하였다. 그리고 관련해서 수력성능 및 축추력의 크기를 10가지 케이스에 대하여 측정하고 계산하였다. 그 결과로부터 로터와 스테이터 양쪽 모두에 나선 홈 실(나선 각 : $0.98^{\circ}$)을 가지는 타입이 가장 효과적임을 알 수 있었다. 이 경우 설계 유량($340m^3/h$)에서 기존 설계보다 양정과 효율은 각각 2.1%와 2.3% 향상 되었고 축추력은 10% 감소 되었다.

Keywords

References

  1. H. F. Black and E. A. Cochran, "Leakage and hybrid bearing properties of serrated seals in centrifugal pump," Presented at the 6th International Conference on Fluid Sealing, Munich, Germany, G5-61 - G5-70, 1973.
  2. T. Iwatsubo, B. Sheng, and M. Ono, "Experiment of static and dynamic characteristics of spiral grooved seals," Rotordynamic Instability Problems in High-Performance Turbomachinery, NASA CP No. 3122, Proceedings of a workshop held at Texas A&M University, N92-14361, pp. 223-234, 1990.
  3. T. Iwatsubo and B. Sheng, "Evaluation of dynamic characteristics of parallel grooved seals by theory and experiment," Proceedings of the Third IFToMM International Conference on Rotor dynamics, Lyon, France, pp. 313-318, 1990.
  4. S. Florjancic, Annular Seals of High Energy Centrifugal Pumps : A New Theory and Full Scale Measurement of Rotordynamic Coefficients and Hydrauric Friction Factors, Ph.D. Dissertation, Swiss Federal Institude of Technology, Zurich, Switzerland, 1990.
  5. T.-W. Ha and A.-S. Lee, "Leakage and rotordynamic analysis of spirla-grooved pump seal based on three-control-volume theory," Journal of Fluid Machinery, vol. 24, no. 1, pp. 14-22, 2003.
  6. T.-W. Ha, "Improvement on prediction of circumferential- groove-pump seal with CFD analysis," Journal of the Korean Society of Tribologists & Lubrication Engineers, vol. 24, no. 6, pp. 291-296, 2008.
  7. D.-J. Kim, S.-S. Hong, C.-H. Choi, and J.-H. Kim, "Axial thrust measurement of fuel pump for liquid rocket engine," Proceedings of The Korea Society of Propulsion Engineers fall conference, pp. 358-362. 2005.

Cited by

  1. Sealing Performance of Bionic Striped Mud Pump Piston vol.2019, pp.1687-8442, 2019, https://doi.org/10.1155/2019/8751540
  2. 토네이도 원리를 이용한 슬러리 펌프의 성능특성에 미치는 로터 형상의 영향 vol.41, pp.10, 2017, https://doi.org/10.3795/ksme-b.2017.41.10.631