Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Lubrication Characteristics of Micro-Textured Slider Bearing: Effect of Dimple Density

Micro-Texturing한 Slider Bearing의 윤활특성 : 딤플 밀도의 영향

  • Park, Tae Jo (School of Mechanical Engineering, ERI, Gyoungsang Nat'l Univ.) ;
  • Lee, Joon Oh (Graduate School of Mechanical and Aerospace Engineering, Gyoungsang Nat'l Univ.)
  • 박태조 (경상대학교 기계공학부) ;
  • 이준오 (경상대학교 대학원 기계항공공학부)
  • Received : 2012.07.09
  • Accepted : 2013.01.02
  • Published : 2013.04.01
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Abstract

In recent times, surface texturing methods have been widely applied to reduce friction and improve the reliability of machine components such as parallel thrust bearings, mechanical face seals, and piston rings. In this study, a numerical analysis is carried out to investigate the effect of uniformly spaced hemispherical dimples on the lubrication characteristics of a slider bearing using a commercial computational fluid dynamics (CFD) code, FLUENT. The pressure distributions, load capacity, leakage flowrate, and friction force are strongly affected by the dimple diameter and the number of dimples. In particular, the load capacity and friction force decrease linearly with the dimple density whereas the leakage increases. These results can be used for designing the optimum dimple characteristics in order to improve the lubrication performance of slider bearings, for which further studies are required.

마찰을 크게 줄임과 동시에 신뢰성을 향상시키기 위하여 평행 스러스트 베어링, 메카니컬 시일과 피스톤링 등과 같은 기계부품에 표면가공방법이 최근에 적용되고 있다. 본 논문에서는 상용 전산유체역학 S/W인 FLUENT를 사용하여 반구형 미세딤플이 등간격으로 배치되어 있는 슬라이더 베어링의 윤활특성을 조사하였다. 미세딤플의 직경과 수에 따라서 압력분포, 지지하중, 누설유량과 마찰력은 아주 크게 변화하였다. 특히, 딤플의 밀도증가에 따라서 지지하중과 마찰력은 거의 선형적으로 감소하는 반면에 누설유량은 급격하게 증가하였다. 본 논문의 결과는 각종 미끄럼 베어링의 윤활성능을 향상시키기 위한 최적 딤플설계에 사용할 수 있으며, 추가적인 연구가 요구된다.

Keywords

References

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  2. Lubrication Characteristics of Surface Textured Parallel Thrust Bearing with Ellipsoidal Dimples vol.32, pp.5, 2016, https://doi.org/10.9725/kstle.2016.32.5.147