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Title: Submersible canned motor mixer pump

A mixer pump used in a waste tank for mobilizing high-level radioactive liquid waste having a column assembly containing power cables, a motor housing with electric motor means which includes a stator can of a stator assembly and a rotor can of a rotor assembly, and an impeller assembly with an impeller connected to a shaft of the rotor assembly. The column assembly locates the motor housing with the electric motor means adjacent to the impeller which creates an hydraulic head, and which forces the liquid waste into the motor housing to cool the electric motor means and to lubricate radial and thrust bearing assemblies. Hard-on-hard bearing surfaces of the bearing assemblies and a ring assembly between the impeller and electric motor means act to grind down large particles in the liquid waste flow. These larger particles are received in slots in the static bearing members of the radial bearing assemblies. Only solid waste particles smaller than the clearances in the system can pass therethrough, thereby resisting damage to and the interruption of the operation of the mixer pump.
 [1];  [2]
  1. (Ohio Township, PA)
  2. (Sarver, PA)
Issue Date:
OSTI Identifier:
Westinghouse Electric Corporation (Pittsburgh, PA) RLO
Patent Number(s):
US 5674057
Contract Number:
Research Org:
Westinghouse Hanford Co
Country of Publication:
United States
submersible; canned; motor; mixer; pump; waste; tank; mobilizing; high-level; radioactive; liquid; column; assembly; containing; power; cables; housing; electric; means; stator; rotor; impeller; connected; shaft; locates; adjacent; creates; hydraulic; head; forces; cool; lubricate; radial; thrust; bearing; assemblies; hard-on-hard; surfaces; grind; particles; flow; larger; received; slots; static; solid; clearances; pass; therethrough; resisting; damage; interruption; operation; radioactive liquid; column assembly; high-level radioactive; motor housing; waste particles; bearing surfaces; rotor assembly; electric motor; liquid waste; solid waste; bearing assemblies; pass therethrough; level radioactive; thrust bearing; motor means; bearing surface; larger particles; radial bearing; mixer pump; stator assembly; power cable; waste tank; assembly containing; means adjacent; submersible canned; static bearing; impeller assembly; active liquid; power cables; canned motor; /417/366/