Rotary kinetic fluid motors or pumps – With inspection – signaling – indicating or measuring means
Patent
1994-03-15
1995-06-27
Look, Edward K.
Rotary kinetic fluid motors or pumps
With inspection, signaling, indicating or measuring means
415111, 277 3, F04D 2908, F04D 704
Patent
active
054275008
ABSTRACT:
A centrifugal pump assembly comprises a pump housing defining a pump cavity, a drive shaft rotatably mounted to the housing, an impeller rotatably disposed in the housing and operatively coupled to the drive shaft, and a shaft seal disposed between the shaft and the housing. At least one sensor is operatively connected to the housing for detecting whether a slurry in the housing has migrated radially inwardly a predetermined extent. Pressurizing componentry is operatively connected to the housing for injecting pressurized air into the housing at a point between the shaft seal and a rotating slurry ring in the housing upon detection by the sensor that a slurry-air interface has moved radially inwardly beyond the location of the sensor. The sensor and the pressurizing componentry thus generate and maintain a gaseous buffer zone between the slurry and the shaft seal during operation of the pump assembly.
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Lee Michael S.
Look Edward K.
The Weir Group plc
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