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
  • F04D29/00—Details, component parts, or accessories
  • F04D29/40—Casings; Connections of working fluid
• • 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
  • F04D13/04—Units comprising pumps and their driving means the pump being fluid driven
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
  • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
  • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous

Definitions

• the present invention relates to the field of handling of slurries, such as manure. More specifically, the present invention relates in a first aspect to a pump for pumping liquid or slurries.
• the present invention relates to a use of a pump according to the first aspect of the present invention for pumping liquid or slurry.
• the present invention relates to a method for pumping liquid or slurry, such as manure.
• This operation requires transfer of the manure from the holding tank to a mobile spreader comprising a spreader for spreading manure.
• a pump In the process of transferring the manure from the holding tank to the mobile tank, a pump is submerged into the slurry in the holding tank.
• the pump is connected to a hose which extends to an inlet of the mobile tank.
• WO 2012/069055 Al discloses a pump for pumping slurries, such as manure.
• the pump comprises a housing which in its interior comprises a pump wheel.
• the pump wheel is mounted on a driveshaft and is configured to be displaced in an axial direction in its bearing. This axial displacement allows the pump wheel to rotate in both directions and hence allows the pump to pump slurries in two opposite direction without the risk of clogging of the pump.
• the motor driving the pump wheel is arranges outside the pump housing itself. In a pumping configuration in which slurry is pumped upwards, the slurry will enter the room between blades of the rotary wheel, whereafter the slurry will exit through the exit opening which is arranged opposite to the pump motor. Accordingly, in the design of the pump disclosed in
• WO 2012/069055 Althe slurry being pumped will not be allowed to be swirled around on the interior walls of the pump housing and exit the pump housing once a particular height of the pump housing is reached. In other words, in case the slurry reached a height immediately below the motor, that slurry will not be directly lead, via the interior walls of the housing, to the exit opening. The slurry will only be allowed to exit the exit opening once the slurry has reached a height of the pump housing corresponding to a height immediately below the motor and once that slurry is located immediately below the exit opening.
• the power of the pump motor is not the limiting factor for the efficiency. Rather the design of the flow channel within the pump housing is being the limiting factor for the efficiency.
• the present invention relates to a pump for pumping slurry, such as manure, said pump in the orientation intended for use, comprising:
• an outer housing comprising an upper end and a lower end and one or more side walls extending between the upper end and said lower end of said outer housing, wherein said lower end of said outer housing comprising a bottom part, wherein said bottom part comprising an inlet opening for slurry;
• -an inner housing comprising an upper end and a lower end
• said motor being confined within the inner housing; said motor comprising a driveshaft arranged at a lower end of said inner housing;
• said upper end of said outer housing comprises an outlet opening for slurry
• said bottom part at an inner perimeter thereof, defining a smoothly curved transition wall, connecting the bottom of the bottom part to the side wall(s) of the outer housing;
• said inner housing being contained within the outer housing and said inner housing extending from an opening in the side wall of the outer housing to a position below said opening in the side wall; said inner housing and outer housing thereby defining a flow space for slurry.
• the present invention relates to a use of a pump according the first aspect for pumping liquid or slurry.
• the present invention relates to a method for pumping liquid or slurry, such as manure, said method comprising the steps:
• the present invention in its various aspects provides for improved pumping efficiency.
• This improved pumping efficiency is brought about by the special design of the flow channel for slurry or liquid between the inlet opening and the outlet opening of the pump of the present invention.
• Fig. 1 is a perspective view showing the outer housing accommodating an inner housing of an embodiment of the pump of the present invention.
• Fig. 2 is an explosive view showing the individual elements making up an embodiment of the pump of the present invention.
• Fig. 3 is a cross-sectional view showing an embodiment of the pump of the present invention.
• Fig. 4 is another cross-sectional view showing an embodiment of the pump of fig. 3.
• Fig. 5 is a perspective view showing an impeller assembly of an embodiment of the pump of the present invention.
• Fig 6 is a perspective view showing a motor assembly of an embodiment of the pump of the present invention.
• Fig. 7 is a perspective view showing a sealing of cables of a power supply to the motor of the pump of the present invention.
• Fig. 8 is a perspective view showing an impeller assembly of an embodiment of the pump of the present invention. Detailed description of the invention
• the present invention relates in a first aspect the present invention relates to a pump for pumping slurry, such as manure, said pump in the orientation intended for use, comprising:
• an outer housing comprising an upper end and a lower end and one or more side walls extending between the upper end and said lower end of said outer housing, wherein said lower end of said outer housing comprising a bottom part, wherein said bottom part comprising an inlet opening for slurry;
• -an inner housing comprising an upper end and a lower end
• said motor being confined within the inner housing; said motor comprising a driveshaft arranged at a lower end of said inner housing;
• said upper end of said outer housing comprises an outlet opening for slurry
• said bottom part at an inner perimeter thereof, defining a smoothly curved transition wall, connecting the bottom of the bottom part to the side wall(s) of the outer housing;
• said inner housing being contained within the outer housing and said inner housing extending from an opening in the side wall of the outer housing to a position below said opening in the side wall; said inner housing and outer housing thereby defining a flow space for slurry.
• the special design involving the inner housing being arranged within the outer housing and accommodating a motor driving an impeller provides for a significant suction power and hence a significant capacity of a pump for pumping liquids or slurries.
• the motor being a hydraulic motor or an electric motor.
• the motor being is a hydraulic motor having an operational hydraulic pressure of 50 - 600 bar, such as 100 - 550 bar, for example 150 - 500 bar, such as 200 - 450 bar, e.g. 250 - 400 bar or 300 - 350 bar.
• Hydraulic motors are preferred because any clogging of the impeller in a hydraulic pump does not amount to any detrimental stress of the hydraulic motor driving the pump. Furthermore, hydraulic outputs are often available in vehicles intended for use with the pump of the first aspect.
• the outlet opening 30 for slurry comprises a flange 40, thus allowing connection of an outlet hose to said outlet opening.
• This embodiment allows liquid or slurry exiting the pump to be directed via an outlet hose to a desired location.
• the inlet opening for slurry comprises a flange, thus allowing connection of an inlet hose to said inlet opening.
• the pump may be used in a situation in which the pump is not submerged into the liquid or slurry to be pumped.
• the inner housing and/or the outer housing is made from steel.
• At least part of the inner housing and/or the outer housing independently is having the shape of an oblique cone or an oblique pyramid.
• the outer housing is being tapered in an upward direction and/or wherein the inner housing is being tapered in an upward direction.
• the outer housing and the inner housing are being obliquely arranged in opposite directions.
• the pump comprising a sealing or a gasket, sealing off an upper end of said driveshaft 26 from a lower end of said driveshaft, thereby preventing passage of liquid or slurry from the flow space between the inner and outer housing into the interior of the inner housing.
• outer housing comprises an upper element and a lower element, said upper element and lower element being connected to each other, such as by welding.
• impeller comprising a disk, said disk comprising an upper side and a lower side, said lower side comprising a number of radially extending impeller ribs.
• the number of impeller ribs 58 being 2 - 15, such as 3 - 14, for example 4 - 13, such as 5 - 12, e.g. 6 - 11, such as 7 - 10 or 8 - 9.
• impeller ribs are being plate-shaped and having a leading surface and a trailing surface.
• each said impeller ribs comprising a closed, hollow or solid element having a leading surface and a trailing surface, wherein at least the trailing surface are being convexly shaped.
• each said impeller rib being curved in a radial direction.
• the pump comprising one or more baffles, said one or more baffles being arranged in the flow space between said inner housing and said outer housing.
• the number of baffles is 1 - 20, such as 2 - 19, for example 3 - 18, such as 4 - 17, e.g. 5 - 16, such as 6 - 15, for example 7 - 14, such as 8 - 13, such as 9 - 12 or 10 - 11.
• the baffles are oriented, in relation to the intended rotational direction of the impeller during use, in such a way that they are inclined upwardly.
• baffles optionally in the above described design, improves aligning the flow of liquid or slurry within the interior of the pump into a direction towards the upper outlet opening. Furthermore, the baffles may provide increased physical strength and integrity.
• the inlet opening for slurry is arranged at the bottom of said bottom part of said outer housing.
• the bottom of said bottom part of said outer housing comprising a removable plate, wherein said removable plate comprising said inlet opening for slurry.
• the pump furthermore comprising one or more cables or hoses for providing power to said motor.
• the upper end of the inner housing comprises a top seal, sealing off the interior of the inner housing.
• a top seal prevents liquid or slurry to enter the interior of the inner housing, thereby protecting the motor being accommodated in that housing.
• the bottom part of said outer housing is having a circular cross-section.
• a circular cross-section of the bottom part of the outer housing may be preferred as the impeller itself performs a circular motion.
• the bottom part of the outer housing may be adapted to the geometry of the impeller or the impellers circular motion.
• the pump in its interior is having a design, a geometry and dimensions comprising a 360° flow space for liquid or slurry at a lower part of the interior of said pump, or at the impeller space, thus allowing liquid or slurry being pumped to perform a 360° flow at a lower part of said pump, or at the impeller space.
• This design allows liquid or slurry to be pumped to be swirled around within the pump before the movement of liquid or slurry is being converted to a more linear and upright directed motion. Accordingly, this design enhances efficiency of the pump.
• the impeller comprises a number of flow directional elements, wherein said flow directional elements, in relation to the intended rotational direction of the impeller during use, being upwardly inclined in a rearward direction.
• each rib comprises a flow directional element.
• directional elements are being arranged at an outer circumference of said impeller.
• the present invention relates to a use of a pump according the first aspect for pumping liquid or slurry.
• the use is for pumping liquid or slurry.
• the liquid or slurry is being animal manure or slurry, such as sewer slurry.
• the present invention relates to a method for pumping liquid or slurry, such as manure, said method comprising the steps:
• FIG. 1 illustrates the design of the housing of a pump 100 of one embodiment of the present invention.
• Fig. 1 shows the outer housing 2 having an upper end 4 and a lower end 6.
• the outer housing 2 comprises a number of side walls 8, 8', 8", 8" ' collectively forming an oblique pyramid making up the housing 2.
• the outer housing comprises in its interior a flow space 23 for slurry.
• the outer housing 2 has been made by welding a bottom part 10 or lower element 50 together with an upper element 48.
• An inner element 14 having an upper end 16 and a lower end 18 (not seen in fig. 1) is arranged in an opening 20 in the side wall 8, 8', 8", 8"'.
• the interior 46 of the inner housing 14 is intended for accommodating a motor, whereas the interior of the outer housing comprises a flow space in which slurry, such as manure, may flow from an inlet opening 12 to an outlet opening 30 by means of power provided by the motor arranged in the interior 46 of the inner housing.
• fig. 2 is an explosive view of one embodiment of the pump 10 ⁇ according to the first aspect of the present invention.
• Fig. 2 shows the outer housing 2.
• the housing comprises an upper element 48 and a lower element 50.
• the upper element 48 and a lower element 50 will preferably be welded together.
• the side wall 8 of the outer housing comprises an opening 20.
• an inner housing 14 In the opening 20 is accommodated an inner housing 14.
• the interior of the inner housing in turn accommodates the motor 24.
• the mother at a lower end thereof comprises a driveshaft 26 which is connected to an impeller 28.
• the impeller comprises a disk 52 which at its lower side comprises a number of radially extending ribs.
• the motor 24 drives the driveshaft 26 which turns the impeller 28.
• the ribs 58 of the impeller ensures that liquid or slurry being located in the vicinity of the impeller will be swirled around in a rotational movement, thus following a flow path defined by the inner wall of the outer hosing.
• Baffles 64 may assist in directing this rotational movement to an upward directed movement of liquid or slurry, hence ultimately resulting to a movement of slurry from the inlet opening 12 located at a position immediately below the lower end of the outer housing 2 through the interior of the outer housing, and finally expelling the liquid or slurry through the outlet opening 30 at an upper end 4 of the outer housing.
• the baffles may additionally serve the purpose of providing improved structural integrity of the pump, in that the baffles may provide a physical contact between the inner and the outer housing. Such contact may for example minimize formation of vibrations in the pump.
• Fig 3 and 4 are both cross-sectional views of an embodiment of the pump according to the first aspect of the present invention.
• the cross-sectional plane is a vertical symmetry plane cutting through the middle part of the inner housing 14, whereas in fig. 3 the cross-sectional plane is a vertical plane arranged perpendicular to the cross-sectional plane of fig. 4.
• Fig. 3 and 4 shows the arrangement of the motor 24 within the interior 46 of the inner housing 14.
• the motor comprises a drive shaft 26 which is connected to the impeller 28.
• the impeller is arranged in an impeller space defined between the lower end 18 of the inner housing and the bottom part 10 of the outer housing.
• the impeller comprises an impeller disk 52 having an upper side 54 and a lower side 56. On the lower side 56 of the impeller is arranged a number of radially extending impeller ribs 58.
• the impeller ribs 58 each comprises a leading surface 60 and a trailing surface 62.
• Baffles 64 aid in guiding the rotational flow of liquid or slurry, brought about by the impeller, into an upward directional movement of liquid or slurry.
• the bottom part 10 or the lower element 50 of the outer housing comprises at an inner perimeter 34 thereof a smoothly curved transition wall 36.
• the transition wall 36 will by virtue of its smoothly curved nature improve efficiency in directing the initially circulating liquid or slurry to an upwardly moving liquid or slurry.
• Fig. 5 is a perspective view showing an impeller assembly of an embodiment of the pump of the present invention.
• Fig. 5 shows the lower element 50 or the bottom part 10 of the outer housing.
• On top of the lower element 50 or the bottom part 10 of the outer housing is arranged an impeller 28.
• the impeller comprises a number of radially extending impeller ribs arranged at a lower side 56 of the disk 52 of the impeller.
• Fig. 6 is a perspective view showing a motor assembly of an embodiment of the pump of the present invention. As seen, the motor assembly is arranged on top of the impeller 28.
• Fig. 7 is a perspective view showing a sealing of cables of a power supply to the motor of the pump of the present invention.
• Fig. 7 illustrates the outer housing 2 comprising the inner housing 14.
• an impeller 28 (not seen in fig. 7).
• the upper end 16 of the inner housing, defining the opening into the interior 46 of the inner housing 14, is closed with a top seal 70 sealing off the interior of the inner housing.
• Two connecting pieces 72 for providing hydraulic pressurized liquid to the hydraulic motor arranged in the interior 46 of the inner housing 14 are present at the outer side of the seal 70.
• the upper element 48 and the lower element 50 of the outer housing 2 and the inner housing 14 are being made separately. Subsequently the upper element 48 the outer housing 2 and the inner housing 14 are being welded to each other so that the inner housing 14 fits into the opening 20 in the side wall of the outer housing. Also, the lower element 50 of the outer housing 2 is being welded to the upper element 48 of the outer housing 2. 'Thereafter the motor is mounted in the interior 46 of the inner housing 14. Next the impeller assembly is mounted onto the driveshaft 26 of the motor 24.
• Fig. 8 is a perspective view showing alternative embodiment of an impeller assembly of the pump of the present invention.
• Fig. 8 shows the lower element 50 or the bottom part 10 of the outer housing.
• On top of the lower element 50 or the bottom part 10 of the outer housing is arranged an impeller 28.
• the impeller comprises a number of radially extending impeller ribs 58 arranged at a lower side 56 of the disk 52 of the impeller.
• the impeller 28 furthermore comprises a number of flow directional elements 63.
• the flow directional elements 63 are, in relation to the intended rotational direction of the impeller during use, being upwardly inclined in a rearward direction.
• Fig. 8 shows that each flow directional element 63 is being arranged at an outer circumference of said impeller and are being arranged on a rib 58.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

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• 2015
  • 2015-12-22 DK DKPA201500834A patent/DK179446B1/da active IP Right Grant
• 2016
  • 2016-12-07 WO PCT/DK2016/050416 patent/WO2017108045A1/en active Search and Examination
  • 2016-12-07 EP EP16822884.9A patent/EP3394451B1/en active Active

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