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논문 기본 정보

자료유형
학술저널
저자정보
Choong Hyun Kim (Korea Institute of Science and Technology) Jisu Park (Korea Institute of Science and Technology)
저널정보
한국트라이볼로지학회 Tribology and Lubricants 한국윤활학회지 제34권 제6호
발행연도
2018.12
수록면
300 - 306 (7page)

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초록· 키워드

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In this study, the performance of foil thrust bearings was investigated by performing bearing takeoff and load capacity tests, using an in-house designed and manufactured vertical bearing test rig. The mean takeoff rotational speed and maximum load capacity of the bearing specimen were ~18,000 rpm and ~80 kPa, respectively. The vertical bearing test rig was observed to yield higher coefficients of friction and frictional torques than a horizontal bearing test rig under identical test conditions. This was a result of its structural characteristics, in that the bearing specimen is placed atop the thrust runner, which keeps it from being separated from the runner after the bearing take-off. In addition, bearing take-off was observed at a higher runner rotational speed as this structure keeps air from flowing between the top foil and runner surfaces, which requires a higher runner speed. The parallel alignment between the bearing specimen and runner surfaces can be maintained within a certain range more easily in a vertical test rig than in a horizontal test rig. Because of these advantages, Korean Industrial Standard, KS B 2060, recommends a vertical bearing test rig as the standard test device for foil thrust bearings.

목차

Abstract
1. Introduction
2. Test Setup and Bearing Specimen
3. Performance Testing
4. Conclusions
References

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