The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Design and Operation Characteristics of a Two-Stage Compressor

이단 압축기의 동력학적 설계 및 운전 특성에 관한 연구

  • 이용복 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 김태호 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 김창호 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 이남수 (한양대학교 기계설계공학과) ;
  • 최동훈 (한양대학교 기계설계공학과)
  • Published : 2002.03.01
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Abstract

The feasibility of an oil-free, motor-driven, two-stage centrifugal compressor supported by air bump bearings is investigated. This centrifugal compressor is driven by a 75 kW motor at an operating speed of 39,000 RPM, and a pressure ratio of the compressor is set up to 4. The analysis is performed by using bearing equilibrium position, heaving stillness, Campbell diagram, unbalance response, and stability. It is demonstrated in this paper that air bump bearings can be adopted well to an oil-free, motor-driven, centrifugal compressor. Specially, Cu-coated bump bearings have enough damping force to reduce a synchronous unbalance for rigid modes of the two-stage compressor. Futhermore, this concept may be applied to the flexible rotor system such as high speed turbomachinery with a super critical speed.

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References

  1. Heshmat, H., 1991, "A Feasiblility Study on the Use of Foil Bearings in Cryogenic Turbopumps," AlAA-91-2103-CP.
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  4. 이용복, 김태호, 김창호, 이남수, 최동훈, 2001, "범프 포일 베어링들의 동적 계수에 관한 연구," 제34회 한국윤활학회 추계학술대회.
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Cited by

  1. Rotordynamic Effects Due to Aerodynamic Instability in a Turbo-compressor with Air Foil Bearings vol.6, pp.2, 2003, https://doi.org/10.5293/KFMA.2003.6.2.062