WO2022138199A1 - 金属溶湯ポンプ - Google Patents
金属溶湯ポンプ Download PDFInfo
- Publication number
- WO2022138199A1 WO2022138199A1 PCT/JP2021/045309 JP2021045309W WO2022138199A1 WO 2022138199 A1 WO2022138199 A1 WO 2022138199A1 JP 2021045309 W JP2021045309 W JP 2021045309W WO 2022138199 A1 WO2022138199 A1 WO 2022138199A1
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- WO
- WIPO (PCT)
- Prior art keywords
- molten metal
- flow path
- wall
- metal flow
- bottomed cylinder
- Prior art date
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 378
- 239000002184 metal Substances 0.000 title claims abstract description 378
- 230000001133 acceleration Effects 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000012986 modification Methods 0.000 description 17
- 230000004048 modification Effects 0.000 description 17
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K44/00—Machines in which the dynamo-electric interaction between a plasma or flow of conductive liquid or of fluid-borne conductive or magnetic particles and a coil system or magnetic field converts energy of mass flow into electrical energy or vice versa
- H02K44/02—Electrodynamic pumps
- H02K44/06—Induction 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
- 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
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
- F04D7/065—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals for liquid metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D27/00—Stirring devices for molten material
- F27D27/005—Pumps
Definitions
- the present invention relates to a molten metal pump, more specifically, a molten metal pump for circulating or stirring the molten metal in a furnace, or for transporting the molten metal.
- a molten metal of a non-ferrous metal such as Al, Cu, Zn, at least two alloys thereof, or a conductor such as Mg alloy is driven by electromagnetic force.
- Metal molten metal pumps are known.
- Patent Document 1 describes a pump that drives a molten metal by using an electromagnetic force generated by the magnetic force lines emitted from a permanent magnet moving while penetrating the molten metal. ..
- the metal molten metal pump of Patent Document 1 has an outer cylinder provided with a molten metal inlet on the bottom wall and an inner cylinder that is detachably stored in the outer cylinder, and a magnetic field device is housed inside the inner cylinder. ..
- a ring-shaped spacer is interposed between the inner surface of the bottom wall of the outer cylinder and the outer surface of the bottom wall of the inner cylinder.
- a vortex-shaped chamber) is formed.
- Patent Document 1 The molten metal pump of Patent Document 1 was made by the present inventor, but the present inventor has continued to pursue research and development toward the realization of a more practical, easy-to-use, and high-performance molten metal pump. rice field. Among them, I came to find the following issues independently.
- the molten metal is driven by electromagnetic force and flows at high speed, so the bottom wall of the outer cylinder, the bottom wall of the inner cylinder, and the spacer that partition the pump chamber are significantly more easily damaged than the other parts.
- the outer cylinder and the inner cylinder form the main body, only the pump chamber cannot be renewed. Further, due to damage or deterioration of the spacer, the molten metal in the pump chamber may leak or the discharge pressure may be significantly reduced.
- the metal molten metal pump of Patent Document 1 since the molten metal inlet for sucking the molten metal in the furnace is provided on the bottom surface of the container (outer cylinder), the metal molten metal pump is installed in a state of being floated from the furnace bottom by the legs. There is a need. In order to reduce the suction resistance of the molten metal, it is necessary to raise the legs, but in that case, it is difficult to ensure the stability of the molten metal pump in the furnace.
- the present invention has been made based on the above recognition, and an object thereof is to provide a metal molten metal pump having excellent maintainability, low cost and high performance.
- the molten metal pump according to the present invention is With a bottomed cylinder with side walls and bottom wall, It has a molten metal flow path that connects the suction port and the discharge port, and has a molten metal flow path body that is separate from the bottomed cylinder.
- a molten metal drive unit having a magnetic field device rotatably arranged around a vertical rotation axis inside the bottomed cylinder, and an electric motor for rotating the magnetic field device. Equipped with The suction port is opened on the side surface of the molten metal flow path body, and the suction port is opened.
- the magnetic field device has a plurality of permanent magnets and has a plurality of permanent magnets.
- the plurality of permanent magnets have an upper surface magnetic pole and a lower surface magnetic pole magnetized so that the upper surface portion and the lower surface portion serve as magnetic poles, respectively.
- the plurality of bottom magnetic poles of the plurality of permanent magnets face the bottom wall in the vertical direction.
- the plurality of permanent magnets are arranged so that bottom magnetic poles having different polarities are alternately arranged along the circumference of the rotation axis.
- the molten metal flow path is located below the bottomed cylinder, and the magnetic force lines from the first permanent magnet among the plurality of permanent magnets downward the bottom wall of the bottomed cylinder.
- the molten metal flow path body may have an inner flow path wall, an outer flow path wall, an upper flow path wall, and a lower flow path wall, and the vertical cross-sectional shape may be closed.
- the molten metal flow path body may have an inner flow path wall, an outer flow path wall, and a lower flow path wall, and may have an upper surface open without having an upper flow path wall.
- the molten metal flow path body may have an inner flow path wall, an outer flow path wall, and an upper flow path wall, and may have an open lower surface without a lower flow path wall.
- the molten metal flow path is an acceleration flow path along the rotation direction of the magnetic field device, an inlet side flow path connecting the suction port and the acceleration flow path, and an outlet side connecting the acceleration flow path and the discharge port. It may have a flow path.
- the molten metal flow path body may have a substantially U-shaped plane shape.
- the molten metal flow path body may have a wavy planar shape.
- the molten metal flow path body may have a substantially L-shaped planar shape.
- the vertical cross-sectional shape of the molten metal flow path may be a horizontally long rectangular shape.
- the molten metal flow path body may be detachably attached to the bottomed cylinder body by a fixing tool.
- a fixing convex portion may be provided on the bottom wall of the bottomed cylinder, and the fixing convex portion may engage with the concave portion surrounded by the inner flow path wall of the molten metal flow path body.
- FIG. 1 It is sectional drawing of the metal molten metal pump which concerns on embodiment immersed in the metal molten metal in a furnace in the state of use. It is a top view of the molten metal flow path body which concerns on embodiment immersed in the metal molten metal in the furnace in the use state. It is a side view of the metal molten metal pump which concerns on embodiment which attached the molten metal discharge pipe to the discharge port of the molten metal flow path body. It is a top view of the molten metal flow path body which concerns on modification 1. FIG. It is a side view of the molten metal flow path body which concerns on modification 1. FIG. It is a top view of the molten metal flow path body which concerns on modification 2. FIG.
- FIG. It is a side view of the molten metal flow path body which concerns on modification 2.
- FIG. It is a top view of the molten metal flow path body which concerns on modification 3.
- FIG. It is a side view of the molten metal flow path body which concerns on modification 3.
- FIG. It is a top view of the molten metal flow path body which concerns on modification 4.
- FIG. It is a side view of the molten metal flow path body which concerns on modification 4.
- FIG. 1 is a cross-sectional view taken along the line II of FIG. 2 and shows a schematic configuration of the molten metal pump 1.
- FIG. 2 is a plan view of the molten metal flow path body 20 of the molten metal pump 1.
- FIG. 3 shows the main body of the metal molten metal pump 1 (bottomed cylinder 10 and molten metal driving unit 30 and the like) and the molten metal flow path body 20 that can be attached to and detached from the main body separately.
- FIG. 4 is a plan view of the magnetic field device (rotating magnet body) 31 according to the present embodiment
- FIG. 5 is a plan view of the magnetic field device 31A according to a modified example of the embodiment.
- a part (at least the molten metal flow path body 20) is immersed in the metal molten metal in a furnace such as a melting furnace or a holding furnace, and as will be described later, an electromagnetic force due to an eddy current is used. It is configured to drive the molten metal.
- the metal molten metal pump 1 includes a bottomed tubular body 10, a molten metal flow path body 20 provided with a molten metal flow path C, and a molten metal driving unit 30 for driving the metal molten metal in the molten metal flow path C.
- a fixture 40, a lid 50, a power supply control panel 60, and a blower 70 are provided.
- the bottomed cylinder 10 is a bottomed cylinder having a side wall 11 and a bottom wall 12.
- the side wall 11 is formed in a cylindrical shape.
- the bottom wall 12 closes the lower end of the side wall 11.
- the side wall 11 may be a cylinder other than a cylinder.
- the bottomed cylinder 10 is made of a material having fire resistance (refractory material), and is made of, for example, brick.
- the molten metal flow path body 20 has a molten metal flow path C that connects the suction port P1 and the discharge port P2. At least the suction port P1 is open on the side surface of the molten metal flow path body 20. In the present embodiment, the discharge port P2 is also open on the side surface of the molten metal flow path body 20. Since the suction port P1 is open on the side surface of the molten metal flow path body 20, the molten metal in the furnace can be sucked in without interposing a leg between the metal molten metal pump 1 and the furnace bottom.
- the molten metal flow path C of the molten metal flow path body 20 is formed in a shape in which the vertical cross section is closed.
- the molten metal flow path body 20 has an inner flow path wall 21, an outer flow path wall 22, an upper flow path wall 23, and a lower flow path wall 24, and the vertical cross-sectional shape is formed by these flow path walls.
- a substantially rectangular molten metal flow path C is formed. Since the vertical cross section of the molten metal flow path C is closed in this way, the discharge pressure of the molten metal can be easily increased. Further, since the molten metal flow path C is composed of only the molten metal flow path body 20, the molten metal flow path C can be completely renewed by replacing the molten metal flow path body 20.
- the molten metal flow path body 20 has a recess R surrounded by the inner flow path wall 21.
- the vertical cross-sectional shape of the molten metal flow path C is a horizontally long rectangular shape.
- the length of the molten metal flow path C in the radial direction becomes relatively long, so that the magnetic force lines of the magnetic field device 31 easily penetrate the metal molten metal of the molten metal flow path C.
- the driving efficiency of the molten metal can be improved.
- molten metal flow path body 20 a plurality of molten metal flow paths C having different flow path cross-sectional areas (height, etc.) may be prepared and used properly according to a desired discharge amount and the like.
- the vertical cross-sectional shape of the molten metal flow path C is not limited to a rectangle, and may be a circle, an ellipse, a polygon, or the like.
- the vicinity of the inlet of the molten metal flow path C may be formed in a tapered shape so that the suction port P1 is wider than the discharge port P2.
- the molten metal flow path body 20 has a substantially U-shaped plane shape.
- the suction port P1 and the discharge port P2 are on the same surface.
- the present invention is not limited to this, and the suction port P1 and the discharge port P2 may be on different surfaces.
- the molten metal flow path C includes an acceleration flow path C1 along the rotation direction of the magnetic field device 31, an inlet side flow path C2 connecting the suction port P1 and the acceleration flow path C1, and an acceleration flow path C1. And an outlet side flow path C3 connecting the discharge port P2.
- the upper portion of the I-I line in FIG. 2 is the acceleration flow path C1, and the acceleration flow path C1 accelerates the molten metal.
- the center of the acceleration flow path C1 substantially coincides with the shaft 33 in a plan view. Since the molten metal flow path C has an acceleration flow path, the metal molten metal in the molten metal flow path C can be efficiently driven.
- the molten metal flow path body 20 is provided separately from the bottomed cylinder 10 and is detachably provided on the bottomed cylinder 10 under the bottomed cylinder 10. There is.
- the molten metal flow path 20 is immersed in the molten metal in the furnace when the molten metal pump 1 is used, and the molten metal flow path C is filled with the molten metal (see FIG. 6).
- the molten metal flow path body 20 is made of a material having fire resistance (refractory material), and is made of, for example, the same material as the bottomed cylinder body 10.
- the magnetic field line ML from the first permanent magnet among the plurality of permanent magnets 31a of the magnetic field device 31 penetrates downward through the bottom wall 12 of the bottomed cylinder 10. Then, it reaches the molten metal flow path C, penetrates the bottom wall 12 upward from the molten metal flow path C, and returns to the second permanent magnet adjacent to the first permanent magnet, and can be attached to and detached from the bottomed cylinder 10. It is provided.
- the molten metal flow path body 20 is detachably attached to the bottomed tubular body 10 by a fixture 40.
- the fixture 40 is, for example, a U-shaped connecting member made of a refractory material, and the end of the connecting member is provided in a fixing hole (not shown) formed in the side wall 11 and the outer flow path wall 22, respectively.
- the fixture 40 may be a rod-shaped or screw-shaped connecting member.
- the upper flow path wall 23 of the molten metal flow path body 20 is in contact with the bottom wall 12 of the bottomed tubular body 10 without a gap.
- the distance between the molten metal flow path C and the magnetic field device 31 becomes short, and the magnetic field penetrating the metal molten metal in the molten metal flow path C becomes strong, so that the driving force of the molten metal can be increased.
- the present invention is not limited to this, and a gap may be provided between the bottom wall 12 and the upper flow path wall 23.
- the molten metal driving unit 30 is configured to drive the metal molten metal of the molten metal flow path C formed in the molten metal flow path body 20 by an electromagnetic force.
- the molten metal driving unit 30 drives the molten metal of the molten metal flow path C from the suction port P1 toward the discharge port P2, whereby the molten metal is discharged from the discharge port P2 and the molten metal in the furnace is discharged from the suction port P1. Is sucked into the molten metal flow path C.
- the molten metal driving unit 30 includes a magnetic field device (rotating magnet body) 31, an electric motor 32 for rotating the magnetic field device 31, a shaft (rotating shaft) 33 connected to the magnetic field device 31, a coupling (shaft joint) 34, and the coupling (shaft joint) 34. It has a gantry 35 and a bearing housing 36.
- the magnetic field device 31 is provided in a suspended state inside the bottomed cylinder 10.
- the magnetic field device 31 is rotatably arranged around the vertical shaft 33.
- the magnetic field device 31 has a plurality of permanent magnets (magnet pieces) 31a and a support plate 31b that supports the plurality of permanent magnets 31a.
- four permanent magnets 31a are fixed on the support plate 31b.
- the magnetic field device 31 may further have another support plate (not shown) that vertically sandwiches the plurality of permanent magnets 31a together with the support plate 31b.
- the plurality of permanent magnets 31a have an upper surface magnetic pole and a lower surface magnetic pole magnetized so that the upper surface portion and the lower surface portion serve as magnetic poles, respectively.
- the magnetic field device 31 is arranged in the bottomed cylinder 10 so that the lower surface magnetic poles of the plurality of permanent magnets 31a face the bottom wall 12 of the bottomed cylinder 10 in the vertical direction.
- the plurality of permanent magnets 31a are arranged so that lower surface magnetic poles (or upper surface magnetic poles) having different polarities are alternately arranged along the circumference of the shaft 33.
- the magnetic force line ML emitted from the N pole of a certain permanent magnet 31a enters the S pole of the permanent magnet 31a (second permanent magnet) adjacent to the permanent magnet.
- the number of permanent magnets 31a is preferably an even number in order to form such magnetic force lines ML for all the permanent magnets 31a.
- the support plate 31b is provided with air holes H5 so that the cooling air introduced into the bottomed cylinder 10 flows around the plurality of permanent magnets 31a.
- the shape of the support plate 31b is not limited to that shown in FIG. 4, and may be, for example, a substantially cross shape. When the number of permanent magnets 31a is two, the shape of the support plate 31b may be rectangular like the magnetic field device 31A according to the modified example of the present embodiment shown in FIG.
- the support plate 31b has a plate-like shape, and permanent magnets 31a are fixed to both ends of the support plate 31b. Also in this modified example, the two permanent magnets 31a are arranged so that the lower surface magnetic poles having different polarities are alternately arranged along the circumference of the shaft 33.
- a magnetic field device having 6 permanent magnets 31a, 8 permanent magnets 31a, ... Is assumed.
- the rotation speed of the magnetic field device 31 is the same, the time change of the magnetic force lines in the molten metal becomes larger as the number of permanent magnets 31a of the magnetic field device increases, and the driving force of the molten metal can be increased.
- the electric motor 32 has a rotating shaft 32a and is installed on a gantry 35 so that the rotating shaft 32a is oriented vertically.
- the rotating shaft 32a is connected to the shaft 33 via a coupling 34.
- the magnetic field device 31 rotates around the shaft 33.
- the electric motor 32 is electrically connected to the power supply control panel 60 via the connecting conductor 61.
- the electric motor 32 is a DC motor and is connected to the positive electrode terminal 60a and the negative electrode terminal 60b of the power supply control panel 60.
- the rotation speed of the electric motor 32 (that is, the rotation speed of the magnetic field device 31) can be controlled.
- the electric motor 32 is configured to have a variable rotation speed of the magnetic field device 31 according to the discharge amount of the molten metal.
- the type of the electric motor 32 is not particularly limited, and may be an AC motor or the like. Further, in the case of an AC motor, the rotation speed of the electric motor 32 may be controlled by an inverter (not shown) of the power supply control panel 60.
- the shaft 33 is inserted through the bearing housing 36 and the lid 50 (shaft insertion hole H3), and connects the magnetic field device 31 and the electric motor 32.
- the lower end of the shaft 33 is fixed to the magnetic field device 31 (support plate 31b), and the upper end of the shaft 33 is connected to the rotating shaft 32a of the motor 32 via the coupling 34.
- the lid 50 is a plate-shaped member that closes the upper opening of the bottomed cylinder 10.
- the space for accommodating the magnetic field device 31 is defined by the lid 50 and the bottomed cylinder 10.
- the lid 50 is provided with an air intake port H1, an air discharge port H2, and a shaft insertion hole H3.
- a ventilation pipe 51 is provided so as to communicate with the air intake port H1.
- a blower 70 for sending air for cooling the magnetic field device 31 is connected to the blower pipe 51.
- an exhaust pipe 52 is provided so as to communicate with the air exhaust port H2. The air sent from the blower pipe 51 into the bottomed cylinder 10 is discharged to the outside from the blower pipe 52.
- the coupling 34 is a shaft joining member that joins the rotating shaft 32a of the electric motor 32 and the shaft 33 fixed to the magnetic field device 31.
- the gantry 35 is fixed on the lid 50, and the motor 32 is installed on the gantry 35.
- a shaft insertion hole H4 is provided on the upper surface of the gantry 35.
- the bearing housing 36 accommodates a bearing (not shown) and is fixed to the lower surface of the lid 50 as shown in FIG.
- the molten metal flow path body 20 is detachably provided under the bottomed cylinder 10 as a separate body from the bottomed cylinder 10. .. More specifically, the molten metal flow path body 20 is located below the bottomed cylinder 10, and the magnetic force lines from the first permanent magnet among the plurality of permanent magnets 31a are the bottom wall of the bottomed cylinder 10. A bottomed cylinder at a position that penetrates 12 downward to reach the molten metal flow path C, penetrates the bottom wall 12 upward from the molten metal flow path C, and returns to the second permanent magnet adjacent to the first permanent magnet. It is provided on the 10 in a detachable manner.
- the molten metal flow path C can be easily renewed at low cost by replacing the molten metal flow path body 20.
- the metal molten metal in the molten metal flow path C is efficiently driven during use, and when the discharge amount decreases, the molten metal flow path body 20 is replaced, so that the performance of the metal molten metal pump can be performed quickly and at low cost. Can be recovered. As a result, downtime loss can be significantly reduced.
- the suction port P1 for sucking the molten metal in the furnace is open on the side surface of the molten metal flow path body 20, the metal molten metal pump 1 is directly installed on the bottom of the furnace without using the legs (leg members). However, the suction resistance of the molten metal is not affected, and a sufficient discharge amount can be secured.
- the molten metal flow path body 20 is installed below the bottomed tubular body 10, the outer diameter of the metal molten metal pump 1 does not increase. Therefore, according to the present embodiment, the installability in the furnace is not impaired.
- the bottomed cylinder 10 and the molten metal flow path body 20 are detachably connected by using the fixing tool 40, but both may be connected without using the fixing tool 40.
- a convex portion (or concave portion) may be provided on the bottom wall 12 of the bottomed cylinder 10, and the convex portion may be fitted into the concave portion (or convex portion) of the molten metal flow path body 20.
- FIG. 6 shows a cross-sectional view taken along the line I-I of FIG.
- the bottom wall 12 of the bottomed cylinder 10 is provided with a fixing convex portion 13, and the fixing convex portion 13 is the inner flow path wall of the molten metal flow path body 20.
- the fixing convex portion 13 may be provided so as to overlap the shaft 33 in a plan view.
- the planar shape of the fixing convex portion 13 is abbreviated as the planar shape of the concave portion R of the molten metal flow path body 20. They may be the same.
- the molten metal flow path body 20 is configured to have an outer peripheral frame portion extending upward from the outer peripheral end thereof, and the bottom portion of the bottomed cylinder 10 fits in the outer peripheral frame portion. You may do so.
- Such an outer peripheral frame portion may be provided on the bottomed cylinder 10 side.
- the metal molten metal pump 1 is submerged in the metal molten metal M in the furnace 100.
- the furnace 100 is, for example, a melting furnace for melting a non-ferrous metal such as aluminum, or a holding furnace for holding a molten metal.
- the non-ferrous metal is not limited to aluminum, and may be, for example, Al, Cu, Zn, at least two alloys thereof, or an Mg alloy.
- the bottomed cylinder 10 and the molten metal flow path 20 are preheat the bottomed cylinder 10 and the molten metal flow path 20 in order to reduce thermal shock.
- the preheat treatment is performed, for example, by blowing warm air from the air intake port H1.
- the power supply control panel 60 is operated to drive the electric motor 32 at a rotation speed according to a desired discharge amount.
- cooling air is blown into the bottomed cylinder 10 from the blower 70 through the blower pipe 51 and the air intake port H1 to cool the magnetic field device 31.
- the cooling air is discharged to the outside from the exhaust pipe 52.
- the magnetic field device 31 rotates with the rotation of the rotating shaft 32a of the electric motor 32, so that the magnetic force line ML exiting from the permanent magnet 31a and entering the adjacent permanent magnet 31a penetrates the molten metal M'in the molten metal flow path C. Move in the state. Eddy currents are generated in the molten metal M'due to the movement of the magnetic force lines ML. As shown in FIG. 8, the molten metal M'is driven in the circumferential direction of the shaft 33 along the acceleration flow path by the electromagnetic force acting on the molten metal M'by this eddy current.
- the metal molten metal M'of the molten metal flow path C is discharged from the discharge port P2, and the metal molten metal M of the external furnace 100 is sucked into the molten metal flow path C from the suction port P1. As a result, the molten metal in the furnace 100 circulates.
- the molten metal pump 1 can be used not only for circulating the molten metal in the furnace but also for pumping the molten metal.
- the molten metal discharge pipe 25 is connected to the discharge port P2 of the molten metal flow path C.
- One end of the molten metal discharge pipe 25 is connected to the discharge port P2 of the molten metal flow path body 20, and the other end (discharge port P3) is open.
- the discharge port P3 has a molten metal level M. in a state where the molten metal pump 1 is installed in the furnace. It is located above L.
- the molten metal in the molten metal flow path C is driven and discharged from the discharge port P2, and then is pumped up to an external tub (not shown) or the like through the molten metal discharge pipe 25.
- the molten metal flow path body is not limited to the substantially U-shaped molten metal flow path body 20 having a closed vertical cross-sectional shape as described above, and various types can be considered.
- the molten metal flow path bodies according to the modified examples 1 to 4 will be described with reference to FIGS. 10A to 13B.
- Modifications 1 and 2 relate to a molten metal flow path whose planar shape is substantially U-shaped but whose vertical cross-sectional shape is not closed.
- Modifications 3 and 4 relate to a molten metal flow path whose planar shape is not U-shaped.
- FIGS. 10A and 10B are plan views of the molten metal flow path body 20A
- FIG. 10B is a side view of the molten metal flow path body 20A.
- the molten metal flow path body 20A according to this modified example corresponds to the one obtained by removing the upper flow path wall 23 from the molten metal flow path body 20. That is, the molten metal flow path body 20A has an inner flow path wall 21, an outer flow path wall 22, and a lower flow path wall 24, and the upper surface thereof is open. As a result, after use, the molten metal flow path body 20A can be removed from the bottomed tubular body 10 and maintenance such as removal of solidified metal in the molten metal flow path C can be easily performed. Further, since the upper flow path wall 23 is not provided, the distance between the molten metal flow path C and the magnetic field device 31 is short, and the molten metal driving efficiency can be improved.
- the upper end surfaces of the inner flow path wall 21 and the outer flow path wall 22 of the molten metal flow path body 20A are in contact with the bottom wall 12 of the bottomed cylinder 10 as closely as possible.
- FIGS. 11A and 11B are plan views of the molten metal flow path body 20B
- FIG. 11B is a side view of the molten metal flow path body 20B.
- the molten metal flow path body 20B according to this modified example corresponds to the one obtained by removing the lower flow path wall 24 from the molten metal flow path body 20. That is, the molten metal flow path body 20B has an inner flow path wall 21, an outer flow path wall 22, and an upper flow path wall 23, and the lower surface thereof is open. Thereby, after use, the molten metal flow path body 20B can be removed from the bottomed tubular body 10 and maintenance such as removal of solidified metal in the molten metal flow path C can be easily performed.
- the molten metal flow path body 20B of this modification When the molten metal flow path body 20B of this modification is used, it is necessary to submerge the metal molten metal pump 1 to the furnace bottom so that the lower end surfaces of the inner flow path wall 21 and the outer flow path wall 22 are in contact with the furnace bottom. .. It is assumed that the furnace bottom is not flat due to solidification of the molten metal and a gap is created between the molten metal flow path 20B and the furnace bottom. Even in such a case, the molten metal in the furnace is circulated. It is not difficult to secure enough discharge pressure to make it. If necessary, the required discharge pressure can be secured by increasing the rotation speed of the motor 32.
- FIGS. 12A and 12B are plan views of the molten metal flow path body 20C
- FIG. 12B is a side view of the molten metal flow path body 20C.
- the molten metal flow path body 20C has a shape with a closed vertical cross section like the molten metal flow path body 20, but has a wavy planar shape. That is, the molten metal flow path body 20C has an inner flow path wall 21, an outer flow path wall 22, an upper flow path wall 23, and a lower flow path wall 24, and the vertical cross-sectional shape is closed.
- the planar shape of the molten metal flow path body 20C is wavy, and the suction port P1 and the discharge port P2 are on the same straight line.
- the molten metal flow path body 20C is suitable, for example, when the metal molten metal pump 1 is installed on the side of the furnace 100.
- the molten metal flow path C is an acceleration flow path (flow sandwiched between the lines L1 and L2) along the rotation direction of the magnetic field device 31. Since it has a path), the molten metal in the molten metal flow path C can be efficiently driven.
- the upper flow path wall 23 or the lower flow path wall 24 may be removed and the upper surface or the lower surface may be opened as in the modified examples 1 and 2.
- FIGS. 13A and 13B are plan views of the molten metal flow path body 20D
- FIG. 13B is a side view of the molten metal flow path body 20D.
- the molten metal flow path body 20D has a shape with a closed vertical cross section like the molten metal flow path body 20, but has a wavy planar shape. That is, the molten metal flow path body 20D has an inner flow path wall 21, an outer flow path wall 22, an upper flow path wall 23, and a lower flow path wall 24, and the vertical cross-sectional shape is closed.
- the planar shape of the molten metal flow path body 20D is substantially L-shaped, and the opening surface of the suction port P1 and the opening surface of the discharge port P2 are orthogonal to each other.
- the molten metal flow path body 20D is suitable, for example, when the metal molten metal pump 1 is installed at a corner portion (corner portion) of the furnace 100.
- the molten metal flow path C is a flow path sandwiched between the lines L3 and L4 along the rotation direction of the magnetic field device 31. Since it has a path), the molten metal in the molten metal flow path C can be efficiently driven.
- the upper flow path wall 23 or the lower flow path wall 24 may be removed and the upper surface or the lower surface may be opened as in the modified examples 1 and 2.
- opening surface of the suction port P1 and the discharge port P2 may intersect at an acute angle or an obtuse angle, not limited to orthogonality.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Reciprocating Pumps (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
側壁および底壁を有する有底筒体と、
吸込口と吐出口を繋ぐ溶湯流路を有し、前記有底筒体とは別体の溶湯流路体と、
前記有底筒体の内部に縦向きの回転軸の周りに回転可能に配置された磁場装置と、前記磁場装置を回転させる電動機とを有する溶湯駆動部と、
を備え、
前記吸込口は前記溶湯流路体の側面に開口し、
前記磁場装置は複数の永久磁石を有し、
前記複数の永久磁石は、それぞれ、上面部分および下面部分が磁極となるように磁化された上面磁極および下面磁極を有し、
前記複数の永久磁石における前記複数の下面磁極は前記底壁と上下に対向しており、
前記複数の永久磁石は、異なる極性の下面磁極が交互に前記回転軸の円周に沿って並ぶように配列されており、
前記溶湯流路体は、前記有底筒体の下の位置であって、前記複数の永久磁石のうち、第1の永久磁石からの磁力線が、前記有底筒体の前記底壁を下方に貫通して前記溶湯流路に至り、前記溶湯流路から前記有底筒体の前記底壁を上方に貫通して前記第1の永久磁石に隣り合う第2の永久磁石に戻る位置に、前記有底筒体に着脱可能に設けられていることを特徴とする。
前記溶湯流路体は、内側流路壁、外側流路壁、上側流路壁および下側流路壁を有し、縦断面形状が閉じていてもよい。
前記溶湯流路体は、内側流路壁、外側流路壁および下側流路壁を有し、上側流路壁を有さず上面が開放されていてもよい。
前記溶湯流路体は、内側流路壁、外側流路壁および上側流路壁を有し、下側流路壁を有さず下面が開放されていてもよい。
前記溶湯流路は、前記磁場装置の回転方向に沿った加速流路と、前記吸込口と前記加速流路を接続する入口側流路と、前記加速流路と前記吐出口を接続する出口側流路とを有してもよい。
前記溶湯流路体は、平面形状が略U字状であるようにしてもよい。
前記溶湯流路体は、平面形状が波状であるようにしてもよい。
前記溶湯流路体は、平面形状が略L字状であるようにしてもよい。
前記溶湯流路の縦断面形状は、横長の略矩形であるようにしてもよい。
前記溶湯流路体は、固定具により前記有底筒体に着脱可能に取り付けられているようにしてもよい。
前記有底筒体の前記底壁には固定用凸部が設けられ、前記固定用凸部が前記溶湯流路体の内側流路壁で囲まれた凹部と係合するようにしてもよい。
図1~図5を参照して、実施形態に係る金属溶湯ポンプ1の構成について説明する。図1は、図2のI-I線に沿う断面図であり、金属溶湯ポンプ1の概略的な構成を示している。図2は金属溶湯ポンプ1の溶湯流路体20の平面図である。図3は、金属溶湯ポンプ1の本体(有底筒体10および溶湯駆動部30等)と、本体に着脱可能な溶湯流路体20とを分けて示している。図4は本実施形態に係る磁場装置(回転磁石体)31の平面図であり、図5は実施形態の変型例に係る磁場装置31Aの平面図である。
上記の説明では、固定具40を用いて有底筒体10と溶湯流路体20は着脱可能に接続されていたが、固定具40を用いずに両者を接続してもよい。たとえば、有底筒体10の底壁12に凸部(または凹部)を設け、この凸部が溶湯流路体20の凹部(または凸部)に嵌合するようにしてもよい。
次に、上述した実施形態に係る金属溶湯ポンプ1の動作について説明する。
溶湯流路体については、上述した縦断面形状が閉じた略U字状の溶湯流路体20に限られず、種々のものが考えられる。以下、変型例1~4に係る溶湯流路体について、図10A~図13Bを参照して説明する。変型例1および2は、平面形状は略U字状であるが、縦断面形状が閉じていない溶湯流路体に関する。変形例3および4は、平面形状がU字状ではない溶湯流路体に関する。
図10Aおよび図10Bを参照して変型例1に係る溶湯流路体20Aについて説明する。図10Aは溶湯流路体20Aの平面図であり、図10Bは溶湯流路体20Aの側面図である。
次に、図11Aおよび図11Bを参照して変型例2に係る溶湯流路体20Bについて説明する。図11Aは溶湯流路体20Bの平面図であり、図11Bは溶湯流路体20Bの側面図である。
次に、図12Aおよび図12Bを参照して変型例3に係る溶湯流路体20Cについて説明する。図12Aは溶湯流路体20Cの平面図であり、図12Bは溶湯流路体20Cの側面図である。
次に、図13Aおよび図13Bを参照して変型例4に係る溶湯流路体20Dについて説明する。図13Aは溶湯流路体20Dの平面図であり、図13Bは溶湯流路体20Dの側面図である。
10 有底筒体
11 側壁
12 底壁
13 固定用凸部
20,20A,20B,20C,20D 溶湯流路体
21 内側流路壁
22 外側流路壁
23 上側流路壁
24 下側流路壁
25 溶湯排出管
30 溶湯駆動部
31,31A 磁場装置
31a 永久磁石
31b 支持板
32 電動機
32a 回転軸
33 シャフト
34 カップリング
35 架台
36 ベアリングハウジング
40 固定具
50 蓋体
51 送風パイプ
52 排風パイプ
60 電源制御盤
60a,60b 端子
61 接続導体
70 ブロワー
100 炉
C 溶湯流路
C1 加速流路
C2 入口側流路
C3 出口側流路
H1 空気取入口
H2 空気排出口
H3,H4 軸挿通孔
H5 空気孔
M,M’ 金属溶湯
ML 磁力線
P1 吸込口
P2 吐出口
P3 排出口
R (溶湯流路体の)凹部
Claims (11)
- 側壁および底壁を有する有底筒体と、
吸込口と吐出口を繋ぐ溶湯流路を有し、前記有底筒体とは別体の溶湯流路体と、
前記有底筒体の内部に縦向きの回転軸の周りに回転可能に配置された磁場装置と、前記磁場装置を回転させる電動機とを有する溶湯駆動部と、
を備え、
前記吸込口は前記溶湯流路体の側面に開口し、
前記磁場装置は複数の永久磁石を有し、
前記複数の永久磁石は、それぞれ、上面部分および下面部分が磁極となるように磁化された上面磁極および下面磁極を有し、
前記複数の永久磁石における前記複数の下面磁極は前記底壁と上下に対向しており、
前記複数の永久磁石は、異なる極性の下面磁極が交互に前記回転軸の円周に沿って並ぶように配列されており、
前記溶湯流路体は、前記有底筒体の下の位置であって、前記複数の永久磁石のうち、第1の永久磁石からの磁力線が、前記有底筒体の前記底壁を下方に貫通して前記溶湯流路に至り、前記溶湯流路から前記有底筒体の前記底壁を上方に貫通して前記第1の永久磁石に隣り合う第2の永久磁石に戻る位置に、前記有底筒体に着脱可能に設けられていることを特徴とする金属溶湯ポンプ。 - 前記溶湯流路体は、内側流路壁、外側流路壁、上側流路壁および下側流路壁を有し、縦断面形状が閉じていることを特徴とする請求項1に記載の金属溶湯ポンプ。
- 前記溶湯流路体は、内側流路壁、外側流路壁および下側流路壁を有し、上側流路壁を有さず上面が開放されていることを特徴とする請求項1に記載の金属溶湯ポンプ。
- 前記溶湯流路体は、内側流路壁、外側流路壁および上側流路壁を有し、下側流路壁を有さず下面が開放されていることを特徴とする請求項1に記載の金属溶湯ポンプ。
- 前記溶湯流路は、前記磁場装置の回転方向に沿った加速流路と、前記吸込口と前記加速流路を接続する入口側流路と、前記加速流路と前記吐出口を接続する出口側流路とを有することを特徴とする請求項1~4のいずれかに記載の金属溶湯ポンプ。
- 前記溶湯流路体は、平面形状が略U字状であることを特徴とする請求項5に記載の金属溶湯ポンプ。
- 前記溶湯流路体は、平面形状が波状であることを特徴とする請求項5に記載の金属溶湯ポンプ。
- 前記溶湯流路体は、平面形状が略L字状であることを特徴とする請求項5に記載の金属溶湯ポンプ。
- 前記溶湯流路の縦断面形状は、横長の略矩形であることを特徴とする請求項1~8のいずれかに記載の金属溶湯ポンプ。
- 前記溶湯流路体は、固定具により前記有底筒体に着脱可能に取り付けられていることを特徴とする請求項1~9のいずれかに記載の金属溶湯ポンプ。
- 前記有底筒体の前記底壁には固定用凸部が設けられ、前記固定用凸部が前記溶湯流路体の内側流路壁で囲まれた凹部と係合することを特徴とする請求項1~9のいずれかに記載の金属溶湯ポンプ。
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EP21910348.8A EP4246074A4 (en) | 2020-12-21 | 2021-12-09 | MOLTEN METAL PUMP |
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Citations (4)
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JPS633258B2 (ja) | 1979-03-23 | 1988-01-22 | Nippon Electron Optics Lab | |
JP2010169381A (ja) * | 2008-12-26 | 2010-08-05 | Zmag:Kk | 非鉄金属溶湯ポンプ及びそれを用いた非鉄金属溶解炉 |
JP2011139611A (ja) * | 2009-12-28 | 2011-07-14 | Kenzo Takahashi | 非鉄金属溶湯ポンプ |
WO2019181884A1 (ja) * | 2018-03-20 | 2019-09-26 | 謙三 高橋 | 金属溶湯ポンプ、及び金属溶湯ポンプにおけるポンプ能力調整方法 |
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JP5546974B2 (ja) | 2010-04-07 | 2014-07-09 | 株式会社ヂーマグ | 非鉄金属溶湯ポンプ及びそれを用いた溶解炉システム |
JP6184215B2 (ja) | 2013-07-18 | 2017-08-23 | 助川電気工業株式会社 | 一体流路構造を有する磁場回転式電磁ポンプ |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS633258B2 (ja) | 1979-03-23 | 1988-01-22 | Nippon Electron Optics Lab | |
JP2010169381A (ja) * | 2008-12-26 | 2010-08-05 | Zmag:Kk | 非鉄金属溶湯ポンプ及びそれを用いた非鉄金属溶解炉 |
JP2011139611A (ja) * | 2009-12-28 | 2011-07-14 | Kenzo Takahashi | 非鉄金属溶湯ポンプ |
WO2019181884A1 (ja) * | 2018-03-20 | 2019-09-26 | 謙三 高橋 | 金属溶湯ポンプ、及び金属溶湯ポンプにおけるポンプ能力調整方法 |
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US20230318428A1 (en) | 2023-10-05 |
AU2021406732A1 (en) | 2023-07-06 |
JP7515173B2 (ja) | 2024-07-12 |
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