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논문 기본 정보

자료유형
학술저널
저자정보
이안성 (한국기계연구원)
저널정보
한국트라이볼로지학회 Tribology and Lubricants 윤활학회지 제28권 제6호
발행연도
2012.12
수록면
265 - 271 (7page)

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초록· 키워드

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In the preceding Part I study, for improving the unbalance response vibration of a large PRT motorgenerator rotor fundamentally by design, a series of design analyses were carried out for bearing improvement by retrofitting from original plain partial journal bearings, applied for operation at a rated speed of 1,800 rpm, to final tilting pad journal bearings. To satisfy evenly key basic lubrication performances such as the minimum lift-off speed and maximum oil-film temperature, a design solution of 5-pad tilting pad journal bearings and maximizing the direct stiffness by about two times has been achieved. In this Part II study, a detailed rotordynamic analysis of the large PRT motor-generator rotor-bearing system will be performed, applying both the original plain partial journal bearings and the retrofitted tilting pad journal bearings, to confirm the effect of rotordynamic vibration improvement after retrofitting. The results show that the rotor unbalance response vibrations with the tilting pad journal bearings are greatly reduced by as much as about one ninth of those with the plain partial journal bearings. In addition, for the tilting pad journal bearings there exist no critical speed up to the rated speed and just one instance of a concerned critical speed around the rated speed, whereas for the plain partial journal bearings there exist one instance of a critical speed up to the rated speed and two instances of concerned critical speeds around the rated speed.

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Abstract
1. 서론
2. 로터다이나믹스 해석
3. 종합 토의
4. 결론
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