프로세스 고속 경량 원심 압축기의 로터다이나믹 안정성강화를 위한 설계해석 - Part I: 베어링 설계의 영향
Design Analysis to Enhance Rotordynamic Stability of High-Speed Lightweight Centrifugal Compressor - Part I: Effects of Bearing Designs
0
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
Part I of this study analyzed the effects of tilting pad bearing designs to reduce the stiffness of thebearings used in a process high-speed lightweight centrifugal compressor intended for a domestic refinery use. This was done in an attempt to enhance the robustness of its rotordynamic stability against possible aerodynamiccross-coupled stiffness. The bearing design variables reviewed were the clearances, LBPs, LOPs , and preloads. Theresults showed that there was practically no difference between the LBP and LOP designs in terms of the bearingstiffness, because the compressor rotor was lightweight and the bearings had relatively high preloads. Increasingboth the machined and assembled clearances in bearing designs has resulted in the bearing stiffness being greatlyreduced. In addition, it has been confirmed that an additional reduction in the bearing stiffness can be obtained forgiven fixed machined clearances by decreasing the preloads, i.e., by increasing the assembled clearances.
Abstract
Part I of this study analyzed the effects of tilting pad bearing designs to reduce the stiffness of thebearings used in a process high-speed lightweight centrifugal compressor intended for a domestic refinery use. This was done in an attempt to enhance the robustness of its rotordynamic stability against possible aerodynamiccross-coupled stiffness. The bearing design variables reviewed were the clearances, LBPs, LOPs , and preloads. Theresults showed that there was practically no difference between the LBP and LOP designs in terms of the bearingstiffness, because the compressor rotor was lightweight and the bearings had relatively high preloads. Increasingboth the machined and assembled clearances in bearing designs has resulted in the bearing stiffness being greatlyreduced. In addition, it has been confirmed that an additional reduction in the bearing stiffness can be obtained forgiven fixed machined clearances by decreasing the preloads, i.e., by increasing the assembled clearances.
참고문헌 (8)
- Nicholas, J. C., "Tilting Pad Bearing Design", Proceedings of the 23rd Turbomachinery Symposium, pp.179~194 (1994)
- "API Standard Paragraph Rotordynamic Tutorial: Lateral Critical Speeds, Unbalance Response, Stability, Train Torsionals, and Rotor Balancing, Chap. 2 & 3" (2005)
- Nicholas, J. C., "The Influence of Tilting Pad Bearing Characteristics on the Stability of High Speed Rotor-Bearing Systems, In Topics in Fluid Film Bearing and Rotor Bearing System Design and Optimization", pp.55~78 (1978), ASME
- Kocur, J. A., "Surveying Tilting Pad Journal Bearing and Gas Labyrinth Seal Coefficients and their Effect on Rotor Stability", Proceedings of the 23rd Turbomachinery Symposium (2007)
- Kocur, J. A., "Rotordynamic Lateral and Stability Analyses for Equipment Reliability", 36th Turbomachinery Syposium Short Course (2007)
- 이안성, "프로세스 대형 모터-발전기의 저어널 베어링 설계 개선 – Part I : 베어링 성능해석", 한국윤활학회지, 28(5), pp.197~202 (2012), 한국윤활학회[DOI]
- 이안성, "프로세스 대형 모터-발전기의 저어널 베어링 설계 개선 – Part II : 로터다이나믹스 해석", 한국윤활학회지, 28(6), pp.265~271 (2012), 한국윤활학회[DOI]
- 이안성, "프로세스 고속 경량 원심 압축기의 로터다이나믹 안정성 강화를 위한 설계해석 − Part II: 로터다이나믹 안정성 개선", 한국윤활학회지, 30(1), pp.9~14 (2014), 한국윤활학회[DOI]