Dynamic behavior of air-oil interface in fluid dynamic bearings with a double sealing structure in a 2.5" hard disk drive due to non-operating axial shock
- Authors
- Kang, Chiho; Jung, Yeonha; Lee, Jihoon; Lee, Minho; Kim, Bumcho; Jang, Gunhee
- Issue Date
- Jun-2016
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Fluid dynamic bearings; Non-operating axial shock; Oil; leakage; Air-oil interface
- Citation
- TRIBOLOGY INTERNATIONAL, v.98, pp.306 - 316
- Indexed
- SCIE
SCOPUS
- Journal Title
- TRIBOLOGY INTERNATIONAL
- Volume
- 98
- Start Page
- 306
- End Page
- 316
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2551
- DOI
- 10.1016/j.triboint.2016.02.033
- ISSN
- 0301-679X
- Abstract
- We propose a numerical procedure to investigate the oil leakage of FDBs with a double sealing structure in a 2.5" HDD due to non -operating axial shock. We confirm the validity of the proposed procedure via a drop test to observe oil leakage of FDBs from the motion of rotor and stator under axial shock. We simulate the two-phase flow of air and oil in FDBs using a finite-volume method and a volume of fluid method to investigate the unsteady motion and break-up of the air-oil interfaces during and after axial shock. Furthermore, we analyze the axial shock -induced motion of air-oil interfaces due to magnitude of shock, and various design variables of the FDBs and the capillary seal.
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