메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색
질문

논문 기본 정보

자료유형
학술대회자료
저자정보
이안성 (한국기계연구원) 김영중 (한국수력원자력) 이병현 (한국수력원자력) 장선용 (대동메탈공업)
저널정보
한국유체기계학회 한국유체기계학회 학술대회 논문집 2024년 한국유체기계학회 하계학술대회
발행연도
2024.7
수록면
292 - 296 (5page)

이용수

표지
📌
연구주제
📖
연구배경
🔬
연구방법
🏆
연구결과
AI에게 요청하기
추천
검색
질문

초록· 키워드

오류제보하기
In case that a large self-weight of entire rotor acts on one large-area tilting pad thrust bearing (TPTB) as in a vertical hydro-power turbine/generator system, a high friction due to possible adhesion and/or asperity-contacts between the surfaces of bearing pads and runner often may hinder a smooth starting-up or slow turning of rotor after a stop. In a purpose of reforming the surface to resolve this, i.e., transforming the boundary into the mixed lubrication, bearing manufacturers traditionally have applied the compound or scraping machining and lately the dimple machining. They also have applied often some narrow tapers on the pad leading-edges to readily introduce lubricating oil and compensate for any possible performance degradation by the scraping or dimple machining.
In this study a lubrication analysis of hydro-power turbine/generator application TPTB, having rectangular dimples on the pad land and taper on the pad leading-edge, is carried-out and the effects of the dimple only, the taper only, and their combination on the TPTB"s two performance indices, i.e., the max. bearing temperature and the min. film thickness, are analyzed. Results show that as the taper height only increases from 0 to 110 μm, both of the indices improve up to 40 μm but thereafter, especially, the max. temperature greatly increases, thus greatly deteriorating. As the dimple depth only increases from 0 to 50 μm, both of the indices improve continously and almost linearly, and especially, at the dimple depth of 40 μm the max. temperature is predicted 65.8°C, exceeding the max. temperature limit of 65.0°C. Eventually, for a practical-optimal range of the taper height, 20 ∼ 40 μm, a combination with the dimple depth of 40 μm accomplishes to yield the max. temperature of no greater than 64.1°C. In other words, the practical-optimal taper on the leading-edge effectively mitigates the side effect of the dimples on the land. Conclusionally, for the targeted TPTB the practical-optimal design values of the dimple depth and taper height be determined as the same 30 ± 10 μm.

목차

ABSTRACT
1. 서론
2. 랜드부 딤플 TPTB 형상 및 윤활성능 해석
3. 결론
참고문헌(Reference)

참고문헌 (0)

참고문헌 신청

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!

최근 본 자료

전체보기

댓글(0)

0