Submersible canned motor transfer pump

Patent · Wed Jan 01 00:00:00 EST 1997

OSTI ID:871106

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

---

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

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