Pump system

Abstract

A pump assembly comprising a shell, an inner casing adapted to allow fluid therethrough and an electric motor comprises a stator and a rotor defined by a hollow body comprising a blade assembly for propulsion of the fluid wherein the shell and/or inner casing may be configured so that a second fluid pathway is defined around the inner casing for colling. The inner casing may be configured for diverting fluid from the second fluid pathway into the interior of the inner casing for fluid contacting bearings of ends of the rotor for cooling and lubrication. The inner casing may also be configured to receive ends of the rotor having opens with ring bearings permitting flow of the fluid through the bearings.

1 - 47 . (canceled) 
     
     
         48 . A pump assembly comprising a shell, an inner casing adapted to allow fluid therethrough comprising an inner space defining a first fluid pathway, and an electric motor located within the inner space and adapted for fluid to traverse the electric motor for propulsion of the fluid, the electric motor comprises a stator and a rotor defined by a hollow body operatively connected to the stator for rotation of the rotor during operation of the stator, the rotor comprising a blade assembly within the hollow body for rotation with the rotor for propulsion of the fluid traversing the pump assembly, wherein the shell and/or inner casing are configured so that a second fluid pathway is defined around the inner casing for cooling of the inner casing and the interior of the inner casing. 
     
     
         49 . A pump assembly according to  claim 48 , wherein the stator comprises a heat sink surrounding the stator. 
     
     
         50 . A pump assembly according to  claim 48 , wherein the inner casing is configured for diverting a portion of fluid in the second fluid pathway the into the interior of the inner casing for fluid contacting bearings of ends of the rotor for interaction thereof. 
     
     
         51 . A pump assembly according to  claim 50 , wherein the interaction comprises lubrication and/or cooling of the bearings. 
     
     
         52 . A pump assembly according to  claim 50 , wherein the inner casing comprises a discharging section having a first entry point and a first exit point, and a suction section having a second entry point and a second exit point, the first entry point and the second exit point being adapted to be joined together for defining the inner casing. 
     
     
         53 . A pump assembly according to  claim 52 , wherein each of the sections comprises a passage traversing longitudinally each section for defining the first fluid pathway. 
     
     
         54 . A pump assembly according to  claim 52 , wherein the discharging section comprises an indentation indenting into the first entry point, and the suction section comprises an indentation indenting into the second exit point for defining the inner space adapted to receive at least partially the electric motor when the discharging and the suction sections are joined together. 
     
     
         55 . A pump assembly according to  claim 52 , wherein the shell comprises a first jacket for receiving the discharging section, and a second jacket for receiving the suction section, the first and second jackets being adapted to be joined together to define the shell. 
     
     
         56 . A pump assembly according to  claim 52 , wherein an outer surface of each of the discharging and suction section comprises ribs arranged in a spaced apart relationship with respect to each other around the outer surface. 
     
     
         57 . A pump assembly according to  claim 56 , wherein neighbouring ribs define a plurality of the second fluid pathways having as side walls the neighbouring ribs and as roofs the sections of the inner surface of the jackets located between the neighbouring ribs. 
     
     
         58 . A pump assembly according to  claim 52 , wherein the outer surface of the discharging section comprises a plurality of grooves, each groove extends longitudinally starting at a location adjacent of the first exit point of the discharging section to the first entry point of the discharging section. 
     
     
         59 . A pump assembly according to  claim 52 , wherein there is provided an opening at the location adjacent the first exit point, the opening traversing the discharging section to permit fluid flow therethrough. 
     
     
         60 . A pump assembly according to  claim 58 , wherein each groove has an open end at the outer periphery of the first entry point of the discharging section. 
     
     
         61 . A pump assembly according to  claim 59 , wherein each groove comprises a tubing having a first end inserted in the opening for receiving fluid flowing through the pump body, and the tubing extending beyond the outer periphery of the first entry point for defining a fluid path from the interior of the discharging section for delivering fluid to the suction section via the tubing. 
     
     
         62 . A pump assembly according to  claim 61 , wherein the suction section comprises inlets arranged in a spaced apart relationship with respect to each other around the outer periphery of the second exit point of the discharge section, the inlets being adapted to receive end sections of the tubing extending beyond the outer periphery of the first entry point of the discharging section. 
     
     
         63 . A pump assembly according to  claim 62 , wherein the indentation of the suction section comprises a rim comprising a plurality of openings arranged in a spaced apart relationship with respect to each other around the rim, each inlet being fluidly connected to a first opening through a passage. 
     
     
         64 . A pump assembly according to  claim 63 , wherein the fluid exiting the openings is delivered to bearings attached to ends of the hollow body of the rotor for interaction with the bearings. 
     
     
         65 . A pump assembly according to  claim 48  wherein the blade assembly is attached to an end of the inner casing. 
     
     
         66 . A pump assembly comprising a shell, an inner casing adapted to allow fluid therethrough comprising an inner space defining a first fluid pathway, and an electric motor located within the inner space and adapted for fluid to traverse the electric motor for propulsion of the fluid, the electric motor comprises a stator and a rotor defined by a hollow body operatively connected to the stator for rotation of the rotor during operation of the stator, the rotor comprising a blade assembly within the hollow body for rotation with the rotor for propulsion of the fluid traversing the pump assembly, the rotor comprises a hollow body having an outer surface facing an inner surface of the stator, the outer surface comprising at least one pocket adapted to receive at least one magnet. 
     
     
         67 . A pump assembly according to  claim 66 , wherein the outer surface comprises a plurality of pockets arranged in a spaced apart relationship with respect to each other, each pocket comprising a curved magnet. 
     
     
         68 . A pump assembly according to  claim 66 , wherein the outer peripheries comprises openings arranged in a spaced apart relationship with respect to each other for receiving ballast for balancing of the body of the rotor. 
     
     
         69 . A centrifugal pump assembly comprising a shell comprising an inner space adapted to allow fluid flow from one end to the other end, an impeller fluidly connected to the other end, and an electric motor located within the inner space and adapted for fluid to traverse the electric motor for propulsion of the fluid, the electric motor comprises a stator and a rotor operatively connected to the impeller and the stator for rotation of the rotor during operation of the stator, the rotor comprising a blade assembly for rotation with the rotor for propulsion of the fluid traversing the pump assembly and being attached to the impeller, wherein the shell is configured so that a fluid pathway is defined around the stator for cooling of the electric motor. 
     
     
         70 . A centrifugal pump assembly according to  claim 69 , wherein the centrifugal pump assembly comprises a centrifugal outlet attached to the other end of the shell for allowing fluid to exit the centrifugal pump assembly.