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http://dx.doi.org/10.5293/KFMA.2002.5.1.055

Design and Operation Characteristics of a Two-Stage Compressor  

Lee, Yong-Bok (한국과학기술연구원 트라이볼로지 연구센터)
Kim, Tae-Ho (한국과학기술연구원 트라이볼로지 연구센터)
Kim, Chang-Ho (한국과학기술연구원 트라이볼로지 연구센터)
Lee, Nam-Soo (한양대학교 기계설계공학과)
Choi, Dong-Hoon (한양대학교 기계설계공학과)
Publication Information
The KSFM Journal of Fluid Machinery / v.5, no.1, 2002 , pp. 55-61 More about this Journal
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.
Keywords
Two-Stage Compressor; Bump Bearing; Rotor-Bearing System; Stability;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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