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Title: Submersible canned motor transfer pump

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 themore » 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.« less
Inventors:
 [1];  [2];  [3];  [4]
  1. (Ohio Township, Allegheny County, PA)
  2. (Sarver, PA)
  3. (Monroeville, PA)
  4. (Lower Burrell, PA)
Issue Date:
OSTI Identifier:
871106
Assignee:
Westinghouse Electric Corporation (Pittsburgh, PA) RLO
Patent Number(s):
US 5659214
Contract Number:
AC06-87RL10930
Research Org:
Westinghouse Hanford Co
Country of Publication:
United States
Language:
English
Subject:
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/

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