WO2024050598A1 - Système de pompe - Google Patents

Système de pompe Download PDF

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Publication number
WO2024050598A1
WO2024050598A1 PCT/AU2023/050860 AU2023050860W WO2024050598A1 WO 2024050598 A1 WO2024050598 A1 WO 2024050598A1 AU 2023050860 W AU2023050860 W AU 2023050860W WO 2024050598 A1 WO2024050598 A1 WO 2024050598A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
rotor
pump assembly
stator
assembly according
Prior art date
Application number
PCT/AU2023/050860
Other languages
English (en)
Inventor
Clark Lenton Wulff
Original Assignee
Random Concepts Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2022902569A external-priority patent/AU2022902569A0/en
Application filed by Random Concepts Pty Ltd filed Critical Random Concepts Pty Ltd
Publication of WO2024050598A1 publication Critical patent/WO2024050598A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • F04D3/02—Axial-flow pumps of screw type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/058—Bearings magnetic; electromagnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/186—Shaftless rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/528—Casings; Connections of working fluid for axial pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D1/025—Comprising axial and radial stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/025—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal comprising axial flow and radial flow stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/181—Axial flow rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • F04D3/005—Axial-flow pumps with a conventional single stage rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/20—Heat transfer, e.g. cooling
    • F05D2260/221—Improvement of heat transfer
    • F05D2260/2214—Improvement of heat transfer by increasing the heat transfer surface
    • F05D2260/22141—Improvement of heat transfer by increasing the heat transfer surface using fins or ribs

Definitions

  • the present invention relates to pump and filter systems.
  • the invention has been devised particularly, although not necessarily solely, in relation to submerged inline pumps and their filter systems.
  • 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.
  • the stator comprises a heat sink surrounding the stator.
  • the heat sink comprises fins extending into the second fluid pathway.
  • the heat sink is configured as cooling fins arranged in a spaced apart relationship with respect to each other surrounding the stator.
  • 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, wherein the inner casing is configured for diverting a portion of fluid in the second fluid pathway into the interior of the inner casing for fluid contacting bearings of ends of the rotor for interaction thereof.
  • the interaction comprises lubrication and/or cooling of the bearings.
  • 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.
  • each of the sections comprises a passage traversing longitudinally each section for defining the first fluid pathway.
  • the discharging section comprises an indentation indenting into the first entry point
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • an opening at the location adjacent the first exit point, the opening traversing the discharging section to permit fluid flow therethrough.
  • each groove has an open end at the outer periphery of the first entry point of the discharging section.
  • 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.
  • 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.
  • 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.
  • the fluid exiting the first openings is delivered to bearings for interaction with the bearings.
  • 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 from one end to another end of the first fluid pathway, wherein the blade assembly is attached to an end of the inner casing.
  • the blade assembly is releasably attached to the one end of the body.
  • the other end and comprises a flow straightener.
  • 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.
  • the pocket comprises an open end, and is configured for slideably receiving the magnet.
  • 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.
  • the pump assembly comprises the discharging section incorporating the electric motor, and a centrifugal outlet for receiving the fluid exiting the discharging section and discharging the fluid.
  • the hollow body comprises open ends defining outer peripheries for receiving bearings such as ceramic or ceram ic/carbon fibre bearings.
  • a flow sensor in the jacket to detect any interruption of fluid flow within the pump assembly. This is particularly advantageous in the particular arrangement where the bearing comprises carbon/ceramic bearing which need to operate only during the presence of fluid flow.
  • 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.
  • 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 from one end to another end of the first fluid pathway, wherein the hollow body comprises open ends permitting traversing of the fluid through the rotor, wherein each end has a bearing supporting rotation of the rotor within the inner casing.
  • the inner casing comprises indentations opposite with respect to each other for receiving ends of the rotor for supporting rotation of the rotor within the inner space.
  • each indentation comprises a sealing assembly to impede fluid leakage from the inner space to the exterior of the inner space.
  • 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.
  • the discharging section and the suction section comprises the indentations arranged opposite with respect to each other for receiving ends of a protective cylinder surrounding the rotor.
  • the sealing assembly comprises a flat gasket resting within a groove of the indentation of each section, a pair of spaced apart O-ring gaskets surrounding the ends of the protective cylinder received within the indentations.
  • each bearing abut the end walls of the respective indentation where each end of the rotor is inserted.
  • a filter unit comprising a body having a receiving section having an inlet and a first open end, and a discharging section having an outlet and a second open end to allow fluid flow through the body, the first and second open ends are adapted to be joined together, wherein the filter unit further comprises a filter medium sandwiched between the first and second open ends for extracting extraneous matter from the fluid.
  • the receiving section comprises a chamber for containment of the extraneous matter.
  • a pump system comprising the pump assembly in accordance with any one of the first to fourth aspect of the invention and the filter unit in accordance with the fifth aspect of the invention fluidly connected with respect to each other.
  • a rotor for operatively being connected to a stator of an electric motor, the rotor comprising a body adapted to allow fluid flow through the body from one end to the other end of the body, and a blade assembly fixed to the rotor for propelling the fluid flow traversing the body of the rotor during rotation of the rotor, wherein the blade assembly is attached to one of the ends of the body of the rotor.
  • the other end comprises a flow straightener.
  • an electric motor comprising a stator having a heat sink surrounding at least partially the stator, and a rotor for rotating within the stator, wherein the rotor comprises a rotor in accordance with the ninth aspect of the invention.
  • 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.
  • 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.
  • Figure 1 is a side perspective view of a particular arrangement of a pump assembly in accordance with a first embodiment of the invention
  • Figure 2 is a side perspective view of a particular arrangement of a filter unit accordance with the first embodiment of the invention
  • FIG 3 is a side perspective view of a pump system, in disassembled condition, comprising the pump assembly shown in figure 1 and the filter unit shown in figure 2;
  • Figure 4 is a cross-sectional view of the pump system shown in figure 1 ;
  • Figure 5 is an exploded view of the pump system shown in figure 1 ;
  • Figure 6a is a perspective view of a particular arrangement of a pump (in opened condition) of the pump system shown in figure 1 ;
  • Figure 6b is a front perspective view of the suction section of the pump shown in figure 6a;
  • Figure 7 is a schematic perspective view of a particular arrangement of a rotor contained in the pump shown in figure 6a;
  • Figure 8 is a top perspective view of a particular arrangement of a centrifugal pump system in accordance with a second embodiment of the invention.
  • Figure 9 is a perspective view of a particular arrangement of a rotor comprising an impeller contained in the centrifugal pump shown in figure 8;
  • Figure 10 is a top perspective view of the discharging section with the cover removed of the centrifugal pump shown in figure 8;
  • Figure 11 is a front perspective view of the suction section of the pump shown in figure 8 comprising an electric motor;
  • Figures 12 and 13 are perspective views of the filter unit shown in figure 2, respectively in the assembled and disassembled condition;
  • Figure 14 is a perspective view of one end of a particular arrangement of a rotor for use in conjunction with the first and second embodiments of the invention
  • Figure 15 is a perspective view of the opposite end of the rotor shown in figure 14;
  • Figure 16 is a close-up side perspective view of the opposite end of the rotor as shown in figure 14;
  • Figure 17 is a perspective view of a particular arrangement of the blade assembly of the rotor shown in figure 14;
  • Figure 18 is a top perspective view of a particular arrangement of a cover for the opposite end of the rotor shown in figure 16;
  • Figure 19 is a perspective view of particular arrangement of the rotor shown in figure 15;
  • Figures 20 to 22 show a particular arrangement of the sealing assembly of the pump system.
  • Figures 1 and 2 depict, respectively, particular arrangements of a pump assembly 10 and a filtering unit 12 in accordance with the first embodiment of the invention.
  • Figure 3 depict a pump system 14, in a disassembled condition, comprising the pump assembly 10 and the filtering unit 12.
  • the pump assembly 10 is adapted to be submerged in a fluid to propulse the fluid in which the pump assembly 10 is contained for moving the fluid from one location to another location. Propulsion of the fluid occurs due the pump assembly 10, as shown in figure 4, comprising a rotor assembly 16 (being defined by a hollow body) contained in a pathway 18 traversing the pump assembly 10 from a discharging end 20 for receiving the fluid, to a suction end 22.
  • a rotor assembly 16 being defined by a hollow body
  • the rotor assembly 16 comprises an electric motor 24 having a stator 25 within which is located a rotor 26 having a blade assembly 28 which during rotation of the rotor 26 (due to the electromagnetic field generated by the coiling of the stator 25 and thus operatively connecting the rotor and stator) propels the fluid contained within the pathway 18 of the pump assembly 10.
  • the pump assembly 10 comprises a shell 30 defining an inner space 32 for containment of the electric motor 24.
  • FIG. 5 shows an exploded view of the pump assembly 10.
  • the pump assembly 10 comprises two jackets 34 and 36 having each an inner space 38 and 40, which when the jackets 34 and 36 are joined together, define the inner space 32 of the shell 30.
  • Each jacket 34 and 36 comprises a rim 42 and 44 being adapted to abut each other when the jackets 34 and 36 are joined together to define the shell 30.
  • the rims 42 and 44 comprises a plurality of openings 46 arranged in a spaced apart relationship with respect to each other for receiving screws 48 for fastening the jackets 34 and 36 together thus sealing the inner space 32 from the exterior.
  • the pump assembly 10 comprises an electric motor 24 within the shell 30.
  • the electric motor 24 comprises: (1 ) the rotor 26 surrounded by a protective cylinder 50 acting as a spacer (for example, made out of carbon fibre), and (2) the stator 25 for receiving the rotor 26 with the protective cylinder 50.
  • the stator 25 comprises a heat sink 27 for heat transfer to occur for cooling of the electric motor.
  • the heat sink 27 is configured as cooling fins 29 (shown in figure 4) arranged longitudinally in a spaced apart relationship with respect to each other surrounding the stator 25.
  • the pump assembly 10 further comprises a pump body 52 containing the electric motor 24 shown in figure 4 and in disassembled condition in figures 5 and 6a.
  • the pump body 52 comprises a shell 30 and an inner casing 53 contained within the shell 30.
  • the shell 30 and/or an inner casing 53 are configured so that passageways 70 (defining a second fluid pathway) are defined between the inner surface of the shell 30 and the outer surface of the inner casing 53 permitting fluid to flow around the inner casing 53 as well through the casing 53, including the electric motor 24.
  • the inner casing 53 comprises two sections, in particular a discharging section 54 and a suction section 56 adapted to be joined together in a sealingly manner per a seal assembly 132.
  • Figures 20 to 22 shows a particular arrangement of the sealing assembly 132.
  • the sealing assembly 132 comprises a plurality of gaskets, in particular: a flat gasket 134 resting within a groove of the indentation 60 of each section 54 and 56, a pair of spaced apart O-ring gaskets surrounding the ends of the protective cylinder 50 received within the indentation 60.
  • each of sections 54 and 56 comprises a passage 58 traversing longitudinally the sections 54 and 56, and indentations 60 defining the inner space 32 adapted to receive the electric motor 24.
  • the electric motor 24 is sandwiched between sections 54 and 56 and contained at least partially within the inner space 32.
  • the indentation 60 are configured in such a manner that the electric motor 24 is sandwiched between the sections 54 and 56 of the pump body 52 in such a manner that the heat sink 27, in particular the cooling fins 29 extend out of the body pump 52 in order to enter in contact with the fluid flowing between the outer surface of the sections 54 and 56 and the inner surface of the jackets 34 and 36 ( the first fluid pathway) for heat transfer to occur to avoid overheating of the electric motor 24.
  • the pathway 18 (the first fluid pathway) to allow fluid flow through the pump assembly 10 is defined by passages 58 when joining together the sections 54 and 56.
  • the passages 58 extend from the entry points 66 to the exist points 64 of the sections 54 and 56.
  • the outer surface of each section 54 and 56 comprises ribs 68 arranged in a spaced apart relationship with respect to each other around the outer surface.
  • passages 70 are defined having as side walls the neighbouring ribs 68 and as roofs, the sections of the inner surface of the sections 54 and 56 located between the neighbouring ribs 68.
  • the passages 70 provide a pathway (defining the second fluid pathway) for allowing fluid to pass over the inner casing 53 for cooling of the inner casing 50 as well as the electric motor 24 due to the colling fins 29 as shown in figure 4 extending into the passage 70.
  • the outer surface of the discharging section 54 comprises a plurality of grooves 72 indenting into the outer surface of section 54.
  • the grooves 72 extend longitudinally starting at a location adjacent of the exit point 64 of the section 54 to the entry point 66 of the section 54.
  • each groove 72 has (1) an opening 73 (at the location adjacent the exit point 64) traversing the section 54 and (2) an open end 75 at the outer periphery of the entry point 66 of the discharging section 54.
  • grooves 72 have openings 73 and open ends 75 permits a tubing (to be inserted in the groove 72 and not shown for illustration purposes) to (1 ) have one of its ends inserted in the opening 73 and (2) its other end to extend beyond the outer periphery of the entry point 66 for joining with inlets 74 of the suction section 56.
  • the inlets 74 are arranged in a spaced apart relationship with respect to each other around the outer periphery of the exit point 64 of the discharge section 56.
  • Corresponding fluid pathways are defined within the suction section 56 extending from each inlet 74 to each respective opening 78.
  • the grooves 72 and the inlets 74 are arranged around the outer peripheries of section 54 and 56 in such a manner that each groove 72 has a counterpart inlet 74 aligned with respect to each other. This allows for (when the sections 54 and 56 are joined together) the end section of the tubing (to be located within the grooves 72) extend beyond the outer periphery of section 54 for insertion in the counterpart inlet 74.
  • fluid paths are defined (by the tubing located within grooves 72) extending longitudinally from a location adjacent to the exit point 64 of the discharging section 54 to the inlets 74 located on the exit point 67 of the suction section 56.
  • the tubing may be a conventional off-the-shelf tubing having an internal diameter of 2.7 mm.
  • figure 6b shows a front perspective view of the entry point 64 of the suction section 56.
  • the indention 60 comprises a rim 76.
  • the rim 76 comprises a plurality of openings 78 arranged in a spaced apart relationship with respect to each other around the rim 76.
  • Each inlet 74 (for the receiving the end section of each tubing located in grooves 72) is fluidly connected to a passage ending in each opening 78. In this manner, the fluid passing through each tubing is delivered to each counterpart inlet 74 and will exit the opening 78.
  • the fluid exiting the openings 78 is delivered to the bearing 88 mounted on the rotor 26 (see figure 7 being a schematic view of the rotor 26) in order to pressure the faces of the bearing 88 to keep them slightly apart to reduce friction.
  • the pressure will only have slight lateral thrust so the openings 78 will cool and lubricate the bearing 88 whilst venturi effect will draw the fluid back into the discharge section 54.
  • the bearings 88 may be fully ceramic bearings or carbon/ceramic or stainless steels/Teflon® bearings. There may be provided a flow sensor in the jacket 34 to detect any interruption of fluid flow within the pump assembly 10. This is particular advantageous in the particular arrangement where the bearing 88 comprises carbon/ceramic bearing which need to operate only during the presence of fluid flow.
  • figure 7 shows a perspective view of the rotor 26.
  • the rotor 26 comprises a cylindrical hollow body 80 defining a passage 82 to allow fluid to enter the body 80 though one end 86 and exiting the other end 84 when the pump assembly 10 is in operation.
  • a blade assembly 28 secured to the inner surface of the body 80 of the rotor 26 in order for the blade assembly 28 to rotate with the body 80 during operation of the stator 25 of the electric motor 24.
  • An opening 90 (see figure 6b) is provided to permit cabling to be connected to the electric motor 24.
  • the body 80 of the rotor 26 comprises at each end 84 and 86 circular bearings 88 attached to the periphery of each end 84 and 86.
  • the bearings 88 supporting rotation of the rotor 26 within the inner casing.
  • the ends 84 and 86 are open ends surrounded by the bearings 88 permitting fluid to transverse the rotor 26 during operation of the pump assembly 10.
  • This arrangement, of the rotor 26 having opens with bearing 88 (in particular flat ring bearings 88 as shown in figure 7) surrounding the open ends 84 and 86 is particularly advantageous because it avoids the need of mechanical seals used in conventional pumps. It is known that the life span of these particular type of mechanical seals is relatively short in particular depending on the particular composition of the fluid and particles immersed within the fluid to be driven by the pumps.
  • Each indentation 60 comprises a sealing assembly (such as sealing assembly 132 shown in figures 20 to 22) to impede fluid leakage from the inner space to the exterior of the inner space.
  • a sealing assembly such as sealing assembly 132 shown in figures 20 to 22
  • the outer surface of the body 80 comprises pockets 92 arranged in a spaced apart relationship with respect to each other around the outer surface of the body 80.
  • the pockets 92 are adapted to receive permanent magnets 128 (see figure 19) for driving the rotational movement of the rotor 26 due to the electromagnetic field generated by the coils of the stator 25.
  • the pockets 90 comprises an open end and are configured for slideably receiving the magnets 128.
  • figures 8 to 11 depict a particular arrangement of a pump assembly 94 in accordance with a second embodiment of the invention.
  • the pump assembly 94 comprises a receiving section 95 (adapted to receive the electric motor 24, as is shown in figure 11 ) and a centrifugal outlet 96 for receiving the fluid exiting the receiving section 95 and discharging the fluid (after having been propelled) through an outlet 97.
  • This particular arrangement of pump assembly 94 shows that the electric motor 24 in accordance with the present embodiment of the invention (comprising the rotor assembly 16) may be retrofitted to other pumps such as centrifugal pumps.
  • the electric motor 24 contained in the receiving section 95 comprises a rotor 98 (see figure 9) having the rotor 26 described with reference to the present embodiments of the invention and an impeller 99 connected to the discharging end 100 of the rotor 26 for rotation together with the rotor 26 (during operation of the electric motor 24) and for receiving the propelled fluid exiting the rotor 26.
  • the impeller 99 (acting just as an impeller of a centrifugal pump), upon receiving the propelled fluid, changes the direction of flow of the fluid in order for the fluid to exit the outlet 97 directed, in this particular arrangement, to a direction perpendicular to the fluid flow of the fluid when entering the pump assembly 94.
  • figures 12 and 13 depict a particular arrangement of a filter unit 102 in accordance with the first embodiment of the invention.
  • the filter unit 12 comprises a body 104 having a receiving section 106 and a discharging section 108.
  • the receiving section 106 comprises an inlet 110 for receiving fluid to be filtered.
  • the discharging section 108 comprises an outlet 112 for discharging the filtered fluid.
  • each of the receiving and discharging sections 106 and 108 is configured as a hemispherical body having an open end 114.
  • the sections 106 and 108 are joined together for defining the filter unit 12 as shown in figure 12 permitting fluid to traverse the filter unit 12 for filtering purposes of the fluid. Filtering occurs via a filter medium 116 sandwiched between the receiving and discharging sections 110 and 112.
  • the particular arrangement shown in figures 2, 3, 12 and 13 depict the filter unit 12 as being configured as an ellipsoid.
  • the receiving and discharging section 106 and 108 may configured as having any shape comprising open ends that may be joined for fluidly connecting the sections 110 and 112.
  • the pump assembly 10 and filter unit 10 may be fluidly connected with respect to each other (as shown in figure 3) to define a pump system 14 adapted to be immersed within a body of fluid that allows filtration of the fluid via the filter unit 12 and subsequent propulsion of the fluid via pump assembly 10.
  • FIG. 16 depicts an alternative arrangement of the rotor assembly 16.
  • the rotor assembly 16 comprises a blade assembly 28 as depicted in figure 17.
  • the blade assembly 28 is attached to one end of the rotor assembly 16 and the opposite end of the rotor assembly 16 comprises a cover 31 .
  • the cover 31 may be configured as a flow straightener.
  • the blade assembly 28 may be releasably attached to the rotor assembly 16 permitting to use different type of blade assemblies 28 depending on the particular circumstances the pump assembly 10 may be used.
  • the rotor assembly 16 comprises a plurality of openings 118 arranged in a spaced apart relationship with respect to each other around the periphery 120 of the end of the rotor 26 comprising the blade assembly 28.
  • the plurality of openings 118 indent longitudinally into the body 122 of the rotor 26. This is particularly advantageous because it allows balancing the rotor 26 t in order that rotation of the body 122 of the rotor 26 occurs about the longitudinal axis of the rotor 25 avoiding precession of the rotor 26 during rotation of the rotor 26.
  • the method for balancing the rotor 26 comprises the step of inserting, for example, sections of cylindrical rods (i.e. ballast) adapted to be received by the openings 118, at specific openings 118 for balancing the rotor 26.
  • FIG 19 shows the rotor 26 shown in figures 14 and 15.
  • the outer surface 124 of the rotor 26 comprises a plurality of pockets 126 arranged in a spaced apart relationship with respect to each other around the body 122. In an arrangement, the pockets are pre-formed and adapted to receive curved magnets.
  • Each pocket 126 is adapted to receive a magnet 128 as shown in figure 19 defining the permanent magnet assembly of the rotor 26 for the rotor 26 to rotate when being immersed in the electromagnetic field generated by the stator 25 containing the rotor assembly 16.
  • the magnets 128 may be fully enclosed with the outer surface of the rotor 26.
  • each pocket 90 comprises an open end 130 and is configured for slideably receiving the magnet 128.
  • each pump assembly 10 defined in one particular aspect of the invention may stand by itself without the features of the pump assemblies defined in any one or all of the other aspects of the invention excluding the particular aspect of the invention.
  • the Description of the Embodiment(s) provides support to each particular pump assembly defined in the first to sixth aspects of the invention. This is particularly true because a person skilled in the art could, without undue experimentation, manufacture any pump assembly defined in any one of the first to sixth aspects of the invention.
  • Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
  • first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first”, “second”, and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electromagnetism (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention porte sur un ensemble pompe comprenant une coque, un boîtier interne conçu pour permettre au fluide de le traverser et un moteur électrique comprenant un stator et un rotor défini par un corps creux comprenant un ensemble pale pour la propulsion du fluide, la coque et/ou le boîtier interne pouvant être conçus de telle sorte qu'un second trajet de fluide est défini autour du boîtier interne pour un refroidissement. Le boîtier interne peut être conçu pour dévier le fluide du second trajet de fluide à l'intérieur du boîtier interne pour que le fluide entre en contact avec des paliers d'extrémités du rotor à des fins de refroidissement et de lubrification. Le boîtier interne peut également être conçu pour loger des extrémités du rotor présentant des ouvertures comportant des paliers annulaires permettant l'écoulement du fluide à travers les paliers.
PCT/AU2023/050860 2022-09-06 2023-09-05 Système de pompe WO2024050598A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2022902569A AU2022902569A0 (en) 2022-09-06 Pump system
AU2022902569 2022-09-06

Publications (1)

Publication Number Publication Date
WO2024050598A1 true WO2024050598A1 (fr) 2024-03-14

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1276208A (fr) * 1960-12-14 1961-11-17 Pompe sans bourrage ni presse-étoupe avec passage du liquide par une section intérieure du palier d'entrée
DE4111451A1 (de) * 1991-04-09 1992-10-15 Balcke Duerr Ag Rieseleinbau-element fuer kuehltuerme
EP0903835A1 (fr) * 1995-04-03 1999-03-24 Z&D Ltd. Pompe à écoulement axial/ hélice marine
US7021905B2 (en) * 2003-06-25 2006-04-04 Advanced Energy Conversion, Llc Fluid pump/generator with integrated motor and related stator and rotor and method of pumping fluid
US10941778B2 (en) * 2018-08-16 2021-03-09 Saudi Arabian Oil Company Motorized pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1276208A (fr) * 1960-12-14 1961-11-17 Pompe sans bourrage ni presse-étoupe avec passage du liquide par une section intérieure du palier d'entrée
DE4111451A1 (de) * 1991-04-09 1992-10-15 Balcke Duerr Ag Rieseleinbau-element fuer kuehltuerme
EP0903835A1 (fr) * 1995-04-03 1999-03-24 Z&D Ltd. Pompe à écoulement axial/ hélice marine
US7021905B2 (en) * 2003-06-25 2006-04-04 Advanced Energy Conversion, Llc Fluid pump/generator with integrated motor and related stator and rotor and method of pumping fluid
US10941778B2 (en) * 2018-08-16 2021-03-09 Saudi Arabian Oil Company Motorized pump

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