Face-type shaft seal with shroud

Details Face-type shaft seal with shroud Face-type shaft seal with shroud

1987-09-04

1989-06-20

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 68, 277 81R, 277 89, F16J 1536

Patent

active

048403849

ABSTRACT:
The face seal of a centrifugal pump has a stationary seal component mounted on the pump casing and a rotary seal component rotatable with the drive shaft extending into the casing and connected to the inner rotary pumping member or impeller. The rotary seal component is biased against the stationary seal component by a resilient welded metal bellows assembly having its end portion opposite the rotary seal component clamped to the drive shaft. To protect the welded metal bellows assembly against abrasive life-shortening contact with particulates in the liquid being pumped, a rigid shroud is provided including a generally cylindrical cavity having an inner wall portion extending close alongside the bellows for at least substantially the full axial extent of the bellows.

REFERENCES:
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patent: 2480506 (1949-08-01), Payne
patent: 2512749 (1950-06-01), McCloskey
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patent: 3973866 (1976-08-01), Vaughan
patent: 4103904 (1978-08-01), Tankus
patent: 4406465 (1983-09-01), Rockwood et al.
patent: 4477088 (1984-10-01), Picard
patent: 4576384 (1986-03-01), Azibert
patent: 4625977 (1986-12-01), Azibert et al.

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