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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 impe

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.

대표청구항 ▼

A submersible motor mixer pump for mixing liquid waste containing particles inside a waste tank, comprising: a column assembly containing electrical power cable means and extending in said waste tank, a motor housing having electric motor means connected to said column assembly, said motor housing i

A submersible motor mixer pump for mixing liquid waste containing particles inside a waste tank, comprising: a column assembly containing electrical power cable means and extending in said waste tank, a motor housing having electric motor means connected to said column assembly, said motor housing immersed in said liquid waste for positioning said electric motor means down into said waste tank, said electric motor means having a stator assembly and a rotor assembly spaced apart to form an annulus therebetween, said stator assembly having a stator can and said rotor assembly having a rotor can and a shaft rotatable therewith, an impeller assembly having an impeller which is connected to said shaft of said rotor assembly for mixing said liquid waste, and bearing means for mounting said electric motor means in said motor housing, said impeller of said impeller assembly including means being structured to create an hydraulic head when mixing said liquid waste and to force said liquid waste into said motor housing for lubricating and cooling said bearing means and for cooling said electric motor means.