G - Physics – 01 – F
Patent
G - Physics
01
F
G01F 23/68 (2006.01) F04D 15/02 (2006.01) F04D 29/12 (2006.01) F04D 29/42 (2006.01) G01F 23/00 (2006.01) G01F 23/30 (2006.01) F04C 15/04 (1990.01)
Patent
CA 2075131
ABSTRACT OF THE DISCLOSURE A pump assembly including an impeller mounted on a shaft for rotation in an impeller casing to move liquid through the casing, the shaft being supported by bearings located in a bearing housing which contains bearing lubricating fluid, a primary seal providing a seal between the shaft and the impeller casing to prevent leakage of liquid from the casing, a secondary seal providing a seal between the shaft and the bearing housing to prevent leakage of lubricating fluid from the bearing housing and a containment vessel interposed between the impeller casing and the bearing housing connecting the impeller casing to the bearing housing and enclosing the primary seal and the secondary seal, the containment vessel having an orifice through a wall thereof for communicating the interior of the containment vessel with a storage container, the orifice being sized to pass liquid emissions from the primary seal during normal pumping operations to the storage container, but to restrict the amount of pumped liquid that is passed to the storage container, allowing the level of liquid to rise in the containment vessel when the primary seal fails, and a sensor located in the containment vessel for causing an alarm to be generated when the liquid reaches a given level.
Osler Hoskin & Harcourt Llp
Peerless Pump Company
LandOfFree
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