Characteristic Analysis of Rotor System due to the Positioning Angles of HDD Supported by Fluid Dynamic Bearings

유체동압베어링으로 지지되는 HDD 의 장착각도에 따른 회전부의 특성해석

  • 황충만 (한양대학교 차세대전력변환시스템공학과) ;
  • 장건희 (한양대학교 대학원 융합기계공학과) ;
  • 이지훈 (한양대학교 대학원 융합기계공학과) ;
  • 이민호 (한양대학교 대학원 융합기계공학과)
  • Published : 2014.10.29

Abstract

This research investigates experimentally and numerically the tilting angle, eccentricity ratio, flying height of axial direction, friction torque, and critical mass of the HDD disk-spindle system due to HDD positioning angle. The tilting angle and the eccentricity ratio are the maximum when the HDD positioning angle is $90^{\circ}$ respect to horizontal position because the external force in radial direction and the torque applied to the rotating part are the maximum when the HDD positioning angle is $90^{\circ}$. The flying height increases with the increase of the HDD positioning angle because the direction of gravity applied to the rotating part changes. The friction torque increases with the increase of the HDD positioning angle until it becomes $60^{\circ}$, and decreases with the increase of the HDD positioning angle after it becomes $60^{\circ}$. The stability is the maximum when the HDD positioning angle is $90^{\circ}$.

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