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Data recording disk drive with nonplanar plate surfaces for damping out-of-plane disk vibration

A disk drive, data recording technology, applied in data recording, magnetic recording, recording information storage, etc., can solve the problems of high viscosity shear force, high power consumption, high spindle motor torque, etc.

Inactive Publication Date: 2005-08-31
HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these damping plates also induce high viscous shear forces on the disc, which require high spindle motor torque, and thus high power consumption, to maintain the required high rotational speed

Method used

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  • Data recording disk drive with nonplanar plate surfaces for damping out-of-plane disk vibration
  • Data recording disk drive with nonplanar plate surfaces for damping out-of-plane disk vibration
  • Data recording disk drive with nonplanar plate surfaces for damping out-of-plane disk vibration

Examples

Experimental program
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Effect test

Embodiment Construction

[0014] In order to further understand the present invention, below in conjunction with Figure 1-3 The structure of the magnetic recording disk drive in the prior art will be described in detail.

[0015] The disk drive includes a housing 10 generally formed with a base 12 and surrounding walls 14 . An actuator, typically a voice coil motor (VCM) actuator, is supported by the base 12 . The VCM includes a rotating part rotatable about an axis 20 and a fixed part including a magnet stack 26 mounted on the base 12; Each actuator arm includes a cantilever and head assembly, such as cantilever 28 and head assembly 30 connected to arm 22 .

[0016] The disk drive includes a set of hard magnetic recording disks mounted in a stack on a rotatable hub connected to a spindle motor. The stack assembly, including the disc stack, hub, and spindle motor, is mounted in a region 32 on the housing base 12 so that the disc stack can rotate about a common axis 34, but the stack assembly is not...

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Abstract

A data recording disk drive has damping plates with nonplanar surfaces for reducing flow-induced, out-of-plane vibration of the disks. The nonplanar damping plates reduce spindle motor torque, as compared with planar damping plates, while reducing the turbulent intensity. Each damping plate has a nonplanar surface that results in spacing between the plate surface and its associated disk surface that varies in the radial direction. The nonplanar surface may be a pattern of surface irregularities or features that may be arranged in concentric patterns, such as a pattern of concentric grooves, depressions or protuberances. The nonplanar surface may be shaped as a section of a conic surface so that in the radial direction the spacing between the damping plate surface and its associated disk surface varies linearly. For the disk surfaces facing the top and bottom of the disk housing, the nonplanar surfaces are applied to the top and bottom of the disk housing. Thus, in the single disk case, no separate damping plate is needed.

Description

technical field [0001] The present invention relates generally to a data recording disk drive, such as a magnetic recording hard disk drive, and more particularly to a disk drive having a damper plate for reducing current-induced out-of-plane disk vibration and current-induced arm and suspension vibration. Background technique [0002] A data recording disk drive has a stack of recording disks that are rotated by a spindle motor and an actuator that moves the read / write head laterally over the surface of the rotating disks. Each read / write head is formed on an air bearing slider attached to one end of the cantilever. The cantilever is connected at its other end to the rigid arm of the actuator and causes the slider to pitch and wobble on the air bearing created by the rotating disk. The future trend of disk drives is the continuous reduction of data track spacing to increase data storage density, and the continuous increase of disk stack rotation speed to reduce data transf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/55G11B5/596G11B33/00G11B33/08G11B33/14
CPCG11B5/5565G11B33/08G11B5/59627
Inventor 陈勋礼费迪南德·亨德里克斯平野敏树马诺杰·凯沙万
Owner HITACHI GLOBAL STORAGE TECH NETHERLANDS BV
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