Optimal design of fluid dynamic bearings to develop a robust disk-spindle system in a hard disk drive utilizing modal analysis

2013 ◽  
Vol 19 (9-10) ◽  
pp. 1495-1504 ◽  
Author(s):  
Jihoon Lee ◽  
Gunhee Jang ◽  
Kyungmoon Jung
Keyword(s):  
Optimal Design ◽  
Modal Analysis ◽  
Hard Disk Drive ◽  
Fluid Dynamic ◽  
Hard Disk ◽  
Disk Drive ◽  
Spindle System

Finite Element Analysis of the Coupled Journal and Thrust Bearing in a Computer Hard Disk Drive

2005 ◽  
Vol 128 (2) ◽  
pp. 335-340 ◽  
Author(s):  
G. H. Jang ◽  
S. H. Lee ◽  
H. W. Kim
Keyword(s):  
Finite Element ◽  
Hard Disk Drive ◽  
Thrust Bearing ◽  
Fluid Dynamic ◽  
Hard Disk ◽  
Disk Drive ◽  
Flying Height ◽  
Separate Analysis ◽  
Element Analysis ◽  
Thrust Bearings

This paper proposes a method to calculate the characteristics of a coupled fluid dynamic journal and thrust bearing of a hard disk drive (HDD) spindle motor. The governing equations for the journal and thrust bearings are the two-dimensional Reynolds equations in the θz and rθ planes, respectively. The finite element method is appropriately applied to analyze the coupled bearing under the conditions of the continuity of mass and pressure at the interface between the journal and thrust bearings. The pressure in the coupled bearing was calculated by applying the Reynolds boundary condition. The validity of this application was verified by comparing the analytical results of the flying height at various rotating speeds with experimental results. The characteristics of the coupled journal and thrust bearing were also investigated due to the Reynolds and Half-Sommerfeld boundary conditions and the coupled and separate analysis. This research demonstrates that the proposed method can accurately and realistically describe the coupled fluid dynamic bearing in a HDD system.

Dynamic analysis of a disk-spindle system in a hard disk drive

2003 ◽  
Vol 39 (2) ◽  
pp. 784-789 ◽  
Author(s):  
T. Hasegawa ◽  
Hongbing Du ◽  
H. Osawa ◽  
H. Nishimura ◽  
T. Oe
Keyword(s):  
Dynamic Analysis ◽  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Spindle System

Reduction in Adsorption of Bearing Oil From Fluid Dynamic Bearings of Hard Disk Drive Spindle Motor by Diamagnetism

2012 ◽  
Vol 48 (11) ◽  
pp. 4152-4155 ◽  
Author(s):  
Hiroshi Tani ◽  
Ryosuke Habara ◽  
Norio Tagawa
Keyword(s):  
Hard Disk Drive ◽  
Fluid Dynamic ◽  
Hard Disk ◽  
Disk Drive ◽  
Spindle Motor

Dynamic analysis of disk-spindle system in hard disk drive

2003 ◽  
Author(s):  
T. Hasegawa ◽  
Hongbing Du ◽  
H. Osawa ◽  
H. Nishimura ◽  
T. Oe
Keyword(s):  
Dynamic Analysis ◽  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Spindle System

Dynamic Characteristics of a Hard Disk Drive Spindle System Due to Imperfect Shaft Roundness

2009 ◽  
Vol 45 (11) ◽  
pp. 5148-5151 ◽  
Author(s):  
K. Y. Koak ◽  
H. W. Kim ◽  
K. M. Jung ◽  
G. H. Jang
Keyword(s):  
Hard Disk Drive ◽  
Dynamic Characteristics ◽  
Hard Disk ◽  
Disk Drive ◽  
Spindle System

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

2016 ◽  
Vol 98 ◽  
pp. 306-316 ◽  
Author(s):  
Chiho Kang ◽  
Yeonha Jung ◽  
Jihoon Lee ◽  
Minho Lee ◽  
Bumcho Kim ◽  
...  
Keyword(s):  
Dynamic Behavior ◽  
Hard Disk Drive ◽  
Fluid Dynamic ◽  
Hard Disk ◽  
Disk Drive
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