Browse Prior Art Database

Quiet Rotating Ceramic Seal Assembly

IP.com Disclosure Number: IPCOM000051486D
Original Publication Date: 1981-Jan-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Sebrosky, RA: AUTHOR [+2]

Abstract

Rotating ceramic fluid seals use a ceramic guide pin free to float in holes in both halves of a seal assembly [*]. The freedom of movement of the pin, which keeps the seal halves fairly concentric, results in an irritating noise brought about by the pin "bouncing around" in a seal assembly comprised of one rotating and one stationary seal. This article describes how a ceramic guide pin is rigidly attached to the rotating seal half, resulting in the virtual elimination of objectionable noise.

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Quiet Rotating Ceramic Seal Assembly

Rotating ceramic fluid seals use a ceramic guide pin free to float in holes in both halves of a seal assembly [*]. The freedom of movement of the pin, which keeps the seal halves fairly concentric, results in an irritating noise brought about by the pin "bouncing around" in a seal assembly comprised of one rotating and one stationary seal. This article describes how a ceramic guide pin is rigidly attached to the rotating seal half, resulting in the virtual elimination of objectionable noise.

The above figure shows a cross-sectional view of the attachment of a ceramic pin to the rotating seal half by means of a specially designed secondary silicone rubber seal between the ceramic seal and the silicone rubber cluster to which the input-output tubes are attached. The secondary seal has a central circular protrusion on it which fits into the large counterbored region of the back surface of the rotating ceramic seal half . A hole through the protrusion provides for the press fit and secure attachment of the ceramic guide pin to the rotating seal half. Reference [*] R. M. Kellogg and J. H. Williams, "Disposable Rotating Fluid Seal," IBM Technical Disclosure Bulletin 18, 1355 (October 1975).

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