Browse Prior Art Database

Bernoulli Disk Decoupler and Stabilizer

IP.com Disclosure Number: IPCOM000088798D
Original Publication Date: 1977-Aug-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Cope, JR: AUTHOR [+3]

Abstract

Fig. 1 shows a problem which occurs when two disks are rotated near each other. It is desirable to have the disks fly near the Bernoulli plate to be stabilized; however, whenever another rotating disk is positioned nearby, the tendency is for the two disks to draw together.

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Bernoulli Disk Decoupler and Stabilizer

Fig. 1 shows a problem which occurs when two disks are rotated near each other. It is desirable to have the disks fly near the Bernoulli plate to be stabilized; however, whenever another rotating disk is positioned nearby, the tendency is for the two disks to draw together.

Fig. 2 depicts a configuration which allows one disk to rotate near another without drawing together. This is done by attaching a spacer to the hub of the unit and increasing the air flow between the disks. The flow can be adjusted either by supplying the system with pressurized air from a source (not shown) or by allowing the pack to pump its own air.

In the latter case, the flow can be adjusted by varying the inner radius of the disks. Where atmospheric pressure is supplied at the hub, the inner radius is found to be 68% of the outer radius. this assumes no flow is allowed between the fixed Bernoulli disk and the rotating disk. By designing the pack so that the inside diameter of the disk equals .68 (outside diameter), the usable stable range which may be used on the disk for writing data is extended.

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