Browse > Article
http://dx.doi.org/10.5293/kfma.2013.16.3.032

Rotordynamic Analysis and Experimental Investigation of the Turbine-Generator System Connected with Magnetic Coupling  

Kim, Byung Ok (KIMM, Department of system dynamics)
Park, Moo Ryong (KIMM, Department of extreme energy systems)
Choi, Bum Seok (KIMM, Department of extreme energy systems)
Publication Information
The KSFM Journal of Fluid Machinery / v.16, no.3, 2013 , pp. 32-38 More about this Journal
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 $1^{st}$ critical speed of generator rotor. The second, if the $1^{st}$ critical speeds of turbine rotor and generator rotor have enough to separation margin in comparison to rated speed, the $1^{st}$ 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.
Keywords
Magnetic coupling; Temperature differential power system; Critical speed; Connection stiffness; Operating fluid;
Citations & Related Records
연도 인용수 순위
  • Reference
1 김성걸, 이성진, 이장무, 1994, "마그네틱 커플링을 장착한 축계의 동적해석(I)," 한국정밀공학회지, Vol. 11, No. 4, pp. 99-105.   과학기술학회마을
2 김성걸, 이장무, 1995, "마그네틱 커플링을 장착한 축계의 동적해석(II)," 한국정밀공학회지, Vol. 12, No. 7, pp. 107-113.   과학기술학회마을
3 박 헌, 1992, "마그네틱 커플링을 장착한 회전축계의 진동 해석에 관한 연구," 서울대학교 석사학위논문.
4 Harris, T. A., 2001, "Rolling Bearing Analysis," John Wiley & Sons.
5 Wu, W., Lovatt, H. C., Dunlop, J. B., 1997, "Analysis and design optimization magnetic couplings using 3D finite element modeling," Magnetics Conference, Digests of INTERMAG '97.
6 API STANDARD 684, 2005, "Rotordynamics Tutorials: Lateral Critical Speeds, Unbalance Response, Stability, Train Torsional, and Rotor Balancing".
7 Johannes, B., Paul, E., 1999, Ball and Roller Bearings-Theory, Design and Application, Wiley, New York.