Browse Prior Art Database

Balanced Spindle Airflow

IP.com Disclosure Number: IPCOM000052677D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Higgins, RC: AUTHOR [+3]

Abstract

In spindle-supported rotating devices which also induce airflow, the airflow can result in excessive outgassing or loss of volatile lubricants from bearings supporting the spindle. A second, nearly equalizing pump is provided at the opposite side of the bearings to balance the airflow.

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Balanced Spindle Airflow

In spindle-supported rotating devices which also induce airflow, the airflow can result in excessive outgassing or loss of volatile lubricants from bearings supporting the spindle. A second, nearly equalizing pump is provided at the opposite side of the bearings to balance the airflow.

In the example of the figure, a rotating mirror 10 having an airflow pump 11 is supported by spindle 12. The pump produces an airflow to pressurize the area adjacent the mirror.

An equalizing pump 13 is provided at the opposite end of the spindle to nearly balance the pumping action of the rotating system, thereby leaving only a slight, controlled negative pressure at the system end, with little airflow across the bearings.

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