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Fluid pumping capillary sealing element for hydrodynamic bearing

A technology for hydrodynamic bearings and seals, applied in the direction of bearing elements, sliding contact bearings, bearings for rotational motion, etc., which can solve problems such as failure, spindle motor or disk drive component performance degradation, etc.

Inactive Publication Date: 2010-06-23
SEAGATE TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Particulate generation and contamination of bearing fluids can lead to impaired performance or failure of spindle motor or disk drive components

Method used

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  • Fluid pumping capillary sealing element for hydrodynamic bearing
  • Fluid pumping capillary sealing element for hydrodynamic bearing
  • Fluid pumping capillary sealing element for hydrodynamic bearing

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specific Embodiment approach

[0095] Described herein is an apparatus and method for providing a compact, robust and efficient fluid sealing system with fluid pumping and capillary features for hydrodynamic bearings. The present invention provides improved shock resistance and vibration response, thereby improving the reliability and performance of disk drive storage systems. Solve the problem of motor jogging, which is the rapid repeated opening and closing of axial spaces between relatively rotatable parts, which expels oil from or draws air into these spaces. The present invention is particularly useful for small disc drives such as 2.5 inch disc drives where motor height is a constraint and which require high performance including high rotational speed and high areal density.

[0096] It will be apparent that the features of the specification and claims are applicable to disk drive storage systems, low profile disk drive storage systems, spindle motors, brushless DC motors, various hydrodynamic bearing...

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Abstract

The invention provides a device and a method for forming a hard and vibration-resisting hydrodynamic bearing. A fluid sealing system which is characterized by fluid pumping and capillary feature is a small disc driving storage system having an improved reliability and property which solves the problem of the slow motion of a motor, wherein the slow motion means the rapidly repeat opening and closing of the spaces between the parts which can relatively rotate and drains oil from these spaces or absorbs air in these spaces. A fluid pumping capillary sealing system comprises a fluid pumping slot for pumping fluid which has a rib part and a slot part. The fluid pumping capillary sealing system further comprises a capillary sealing element. A sweeping rib sweeps the fluid towards the bearing; a docking rib is positioned close to the sweeping rib; and the docking rib extends for a shorter radial distance than the sweeping rib so as to form a pressurizing area.

Description

Background of the invention [0001] Disk drive storage systems store digital information recorded on concentric tracks on disk media. At least one disk is rotatably mounted on the spindle and information stored on the disk in magnetically transduced form can be accessed using a read / write head or transducer. A drive controller is typically used to control the disk drive system according to commands received from the host system. A drive controller controls the disk drives to store information and retrieve information from the disks. The read / write head sits on a pivoting arm that moves radially over the disk surface. During operation, the disks are turned at high speeds by electric motors located in the hub or below the disks. Magnets on the hub interact with the stator to rotate the hub relative to the stator. One type of electric motor has a spindle mounted by a bearing system to the motor shaft disposed in the center of the hub. These bearings allow rotation between the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/16H02K5/10F16C32/06F16C33/72
CPCF16C2370/12F16C32/064F16C33/723F16C33/745F16C41/008F16C17/00F16C32/06G11B19/20H02K5/167
Inventor A·L·格兰兹L·B·吕K·D·科卢坡
Owner SEAGATE TECH LLC
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