Submersible canned motor transfer pump

Patent · Wed Jan 01 04:00:00 EST 1997

OSTI ID:871106

Guardiani, Richard F ^[1]; Pollick, Richard D ^[2]; Nyilas, Charles P ^[3]; Denmeade, Timothy J ^[4]

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1. Ohio Township, Allegheny County, PA
2. Sarver, PA
3. Monroeville, PA
4. Lower Burrell, PA

A transfer pump used in a waste tank for transferring high-level radioactive liquid waste from a waste tank and having a column assembly, a canned electric motor means, and an impeller assembly with an upper impeller and a lower impeller connected to a shaft of a rotor assembly. The column assembly locates a motor housing with the electric motor means adjacent to the impeller assembly which creates an hydraulic head, and which forces the liquid waste, into the motor housing to cool the electric motor means and to cool and/or lubricate the radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the upper impeller and electric motor means grind large particles in the liquid waste flow. Slots in the static bearing member of the radial bearing assemblies further grind down the solid waste particles so that only particles smaller than the clearances in the system can pass therethrough, thereby resisting damage to and the interruption of the operation of the transfer pump. The column assembly is modular so that sections can be easily assembled, disassembled and/or removed. A second embodiment employs a stator jacket which provides an alternate means for cooling the electric motor means and lubricating and/or cooling the bearing assemblies, and a third embodiment employs a variable level suction device which allows liquid waste to be drawn into the transfer pump from varying and discrete levels in the waste tank.

• Research Organization: Westinghouse Hanford Co
• DOE Contract Number: AC06-87RL10930
• Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
• Patent Number(s): US 5659214
• OSTI ID: 871106
• Country of Publication: United States
• Language: English

Related Subjects

/310/417/
active liquid
adjacent
allows
allows liquid
alternate
assembled
assemblies
assembly
bearing
bearing assemblies
bearing surface
bearing surfaces
canned
canned motor
clearances
column
column assembly
connected
cool
cooling
creates
damage
device
disassembled
discrete
drawn
easily
easily assembled
electric
electric motor
embodiment
embodiment employs
employs
flow
forces
grind
hard-on-hard
head
high-level
high-level radioactive
housing
hydraulic
impeller
impeller assembly
interruption
jacket
level
level radioactive
levels
liquid
liquid waste
locates
lubricate
lubricating
means
means adjacent
modular
motor
motor housing
motor means
operation
particles
pass
pass therethrough
provides
pump
radial
radial bearing
radioactive
radioactive liquid
removed
resisting
rotor
rotor assembly
sections
shaft
slots
solid
solid waste
static
static bearing
stator
submersible
submersible canned
suction
suction device
surfaces
tank
therethrough
third
third embodiment
thrust
thrust bearing
transfer
transfer pump
transferring
upper
variable
varying
waste
waste particles
waste tank