Design of herringbone groove disk damper for effective suppression of axial vibration of disk in hard disk drive

Moonho Choi, Yoon Chul Rhim

Research output: Contribution to journalArticle

Abstract

A herringbone groove pattern is applied to a plane disk damper of a hard disk drive to reduce the axial vibration of the disk rotating at high speed. According to the design parameters such as mean radius rm, ridge-groove ratio B, and spiral angle β, the performance of the herringbone groove disk damper is studied numerically in terms of the stiffness and the damping coefficients and the ratio of the axial stiffness to the frictional torque. The dynamic coefficients are calculated from the result of computational fluid dynamics solution of a simple hard disk drive model using four-point central difference scheme. To confirm the numerical results, the nonrepeatable run-out of the disk is measured when a plane or a herringbone groove disk damper is used. It is found that a herringbone groove disk damper increases the stiffness as well as the damping coefficient of the air film by 20% more than those of a plane disk damper.

Original languageEnglish
Article number5929009
Pages (from-to)1882-1885
Number of pages4
JournalIEEE Transactions on Magnetics
Volume47
Issue number7
DOIs
Publication statusPublished - 2011 Jul 1

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Hard disk storage
Stiffness
Damping
Rotating disks
Computational fluid dynamics
Torque
Air

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

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title = "Design of herringbone groove disk damper for effective suppression of axial vibration of disk in hard disk drive",
abstract = "A herringbone groove pattern is applied to a plane disk damper of a hard disk drive to reduce the axial vibration of the disk rotating at high speed. According to the design parameters such as mean radius rm, ridge-groove ratio B, and spiral angle β, the performance of the herringbone groove disk damper is studied numerically in terms of the stiffness and the damping coefficients and the ratio of the axial stiffness to the frictional torque. The dynamic coefficients are calculated from the result of computational fluid dynamics solution of a simple hard disk drive model using four-point central difference scheme. To confirm the numerical results, the nonrepeatable run-out of the disk is measured when a plane or a herringbone groove disk damper is used. It is found that a herringbone groove disk damper increases the stiffness as well as the damping coefficient of the air film by 20{\%} more than those of a plane disk damper.",
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Design of herringbone groove disk damper for effective suppression of axial vibration of disk in hard disk drive. / Choi, Moonho; Rhim, Yoon Chul.

In: IEEE Transactions on Magnetics, Vol. 47, No. 7, 5929009, 01.07.2011, p. 1882-1885.

Research output: Contribution to journalArticle

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