Face-type shaft seal with shroud
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United States of America Patent
Stats
-
Jun 20, 1989
Grant Date -
N/A
app pub date -
Sep 4, 1987
filing date -
Sep 4, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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