마그네틱 커플링으로 연결된 터빈-발전기 시스템의 로터다이나믹 해석 및 실험적 고찰

다국어 초록 (Multilingual Abstract)

This paper deals with the study on the rotordynamic and experimental analysis of turbine-generator system connected with a magnetic coupling. Although magnetic coupling has been used to torque transmission of chemical processing pump rotating at under 3,600rpm, magnetic coupling in this study is applied to high-speed turbine-generator system using a working fluid that is refrigerant such as ammonia or R-124a. Results of rotordynamic design analysis are as follows. The first, shaft diameter nearest to outer hub of magnetic coupling has a big effect on the 1st critical speed of generator rotor. The second, if the 1st critical speeds of turbine rotor and generator rotor have enough to separation margin in comparison to rated speed, the 1st critical speed of turbine-magnetic coupling-generator rotor train has enough to separation margin regardless of connection stiffness of magnetic coupling. The analytical FE model is guaranteed by impact test on the prototype and condition monitoring such as measurements of vibration and bearing temperature is also performed.

참고문헌 (Reference)

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3 김성걸, "마그네틱 커플링을 장착한 축계의동적해석(II)" 12 (12): 107-113, 1995

4 "Rotordynamics Tutorials: Lateral Critical Speeds, Unbalance Response, Stability, Train Torsional, and Rotor Balancing"

5 Harris, T. A., "Rolling Bearing Analysis" John Wiley & Sons 2001

6 Johannes, B., "Ball and Roller Bearings-Theory, Design and Application" Wiley 1999

7 Wu, W., "Analysis and design optimization magnetic couplings using 3D finite element modeling" 1997