CN115001236A - Liquid metal electromagnetic pump - Google Patents
Liquid metal electromagnetic pump Download PDFInfo
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- CN115001236A CN115001236A CN202210333850.8A CN202210333850A CN115001236A CN 115001236 A CN115001236 A CN 115001236A CN 202210333850 A CN202210333850 A CN 202210333850A CN 115001236 A CN115001236 A CN 115001236A
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- pump
- liquid metal
- stator core
- liquid
- heat
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- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 106
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000004804 winding Methods 0.000 claims abstract description 16
- 238000005086 pumping Methods 0.000 claims description 11
- 230000005855 radiation Effects 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 239000000463 material Substances 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
- H02K44/04—Conduction pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The liquid metal electromagnetic pump includes: pump ditch pressure pipeline, pump ditch inner casing and electromagnetic drive device. The pump channel pressure conduit has a flow inlet for receiving an inflow of liquid metal and a flow outlet for conveying the liquid metal outwardly. The pump ditch inner shell is arranged on the radial inner side of the pump ditch pressure pipeline, and the pump ditch inner shell and the pump ditch pressure pipeline jointly form an annular flow channel communicated with the liquid flow inlet and the liquid flow outlet and used for flowing liquid metal. The electromagnetic driving device is used for providing electromagnetic force for driving the liquid metal to flow in the annular flow passage. The electromagnetic drive device includes: an outer stator core and a plurality of outer coils. The outer stator core extends axially on the radial outer side of the pump gallery pressure line, and the stator core is provided with a plurality of winding slots along the length direction thereof. Each outer coil is disposed in one winding slot of the outer stator core. The at least one external coil is configured to transfer heat to the pump channel pressure conduit either directly or indirectly through a heat transfer medium.
Description
Technical Field
The invention relates to the technical field of electromagnetic pumps, in particular to a liquid metal electromagnetic pump.
Background
As an important liquid metal conveying device, the liquid metal electromagnetic pump has the advantages of no medium contact, no moving part, complete sealing, simple and convenient maintenance and the like, and is widely applied to the field of nuclear power.
In order to ensure that the liquid metal electromagnetic pump can stably operate for a long time, the heat dissipation problem is very important. For the liquid metal electromagnetic pump used in the nuclear power field, since it must bear a certain dose of neutron and gamma ray irradiation, in order to avoid maintenance caused by forced cooling, the liquid metal electromagnetic pump used in the nuclear industry is cooled by natural heat dissipation.
At present, the heat dissipation of the liquid metal electromagnetic pump is mainly to naturally dissipate the heat of an external coil of the liquid metal electromagnetic pump. That is, the external coil is exposed to the external environment, and the heat of the external coil is convectively taken away by air. In addition, because the liquid metal flowing into the pump groove pressure pipeline of the liquid metal electromagnetic pump has higher temperature, the pump groove pressure pipeline generally has higher temperature, and the common means in the field is to arrange a heat insulation layer between the external coil, the external stator iron core and the pump groove pressure pipeline for reducing heat transmission among the external coil, the external stator iron core and the pump groove pressure pipeline so as to prevent the external coil and the external stator iron core from absorbing the heat of the pump groove pressure pipeline to cause the overhigh temperature of the external stator iron core and the external coil.
Disclosure of Invention
The embodiment of the application aims to provide a liquid metal electromagnetic pump with a novel heat dissipation mode.
In order to achieve the above object, an embodiment of the present application provides a liquid metal electromagnetic pump, including:
the pump ditch pressure pipeline is provided with a liquid flow inlet used for receiving inflow of liquid metal and a liquid flow outlet used for conveying the liquid metal outwards;
the closed pump ditch inner shell is arranged on the radial inner side of the pump ditch pressure pipeline, and the pump ditch inner shell and the pump ditch pressure pipeline jointly form an annular flow channel communicated with the liquid flow inlet and the liquid flow outlet and used for allowing liquid metal to flow; and
the electromagnetic driving device is used for providing electromagnetic force for driving the liquid metal to flow in the annular flow channel; the electromagnetic drive device includes:
an outer stator core extending axially on a radially outer side of the pump gallery pressure duct, the stator core having a plurality of winding slots along a length direction thereof; and
a plurality of outer coils, each of the outer coils being disposed in one of the winding slots of the outer stator core; wherein at least one of the external coils is configured to transfer heat to the pump channel pressure conduit directly or indirectly through a heat transfer medium.
The embodiment of the application especially configures the external coil to directly or indirectly transmit the heat to the pump ditch pressure pipeline through the heat transfer medium without arranging the heat insulation layer, so that the heat of the external coil can be transmitted to the pump ditch pressure pipeline, and then the heat of the external coil is taken away by utilizing the liquid metal flowing inside the annular flow passage, and the temperature of the external coil is reduced.
In the embodiment of the application, the heat of the external coil can be transferred to the liquid metal flowing in the annular flow channel, so that the heating power of the liquid metal in the whole liquid metal circulation loop can be reduced.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
FIG. 1 is a schematic diagram of a liquid metal electromagnetic pump according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view of the liquid metal electromagnetic pump of FIG. 1;
FIG. 3 is a schematic diagram of a portion of the liquid metal electromagnetic pump of FIG. 1; and
FIG. 4 is a partial cross-sectional view of the liquid metal electromagnetic pump of FIG. 1.
It is noted that the drawings are not necessarily to scale and are merely illustrative in nature and not intended to obscure the reader.
Description of the reference numerals:
100. a liquid metal electromagnetic pump;
10. a pump-pit pressure conduit; 11. a liquid stream inlet; 12. a liquid stream outlet;
20. a pump channel inner housing; 21. a side wall; 22. an end face;
30. an annular flow passage;
41. an outer stator core; 411. a strip-shaped iron core; 42. an external coil; 43. an inner stator core; 431. a strip-shaped iron core; 44. an inner coil; 45. an inner stator mount;
50. an annular pressure stabilizing cavity; 51. an inlet section; 511. a radially inner wall; 512. a radially outer wall; 52. an outlet section; 520. an outlet; 521. a radially inner wall; 522. a radially outer wall;
60. a first cylinder;
70. a second cylinder;
80. an outer annular flow passage;
90. a protective housing; 91. a flange; 92. and a liquid outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention. It should be apparent that the described embodiment is one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
It is to be noted that technical terms or scientific terms used herein should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs, unless otherwise defined.
The meaning of "a plurality" in the description of embodiments of the present invention is at least two, e.g., two, three, etc., unless explicitly specified otherwise.
The electromagnetic pump can be divided into a flat type, a spiral type and a cylinder type according to the form of the pump channel. The section of the cylindrical pump channel is annular, the inductor (namely the stator core and the coil) is arranged on the radial outer side of the pump channel, and the radial inner side of the pump channel is provided with the built-in core. The liquid metal electromagnetic pump provided by the embodiment of the application is a cylindrical induction type electromagnetic pump.
FIG. 1 is a schematic diagram of a liquid metal electromagnetic pump according to one embodiment of the present invention; fig. 2 is a cross-sectional view of the liquid metal electromagnetic pump shown in fig. 1. Referring to fig. 1 and 2, a liquid metal electromagnetic pump 100 of an embodiment of the present invention includes: pump channel pressure line 10, pump channel inner housing 20 and electromagnetic drive.
The pump channel pressure conduit 10 has a liquid flow inlet 11 for receiving the inflow of liquid metal and a liquid flow outlet 12 for conveying the liquid metal outwards. The pump channel pressure pipeline 10 may be a cylinder, and both side ports of the cylinder are open ends, one side port of the cylinder is used as a liquid flow inlet 11, and the other side port is used as a liquid flow outlet 12.
The pump channel inner housing 20 is a closed structure having a receiving cavity. The pump groove inner shell 20 is arranged on the radial inner side of the pump groove pressure pipeline 10, and the pump groove inner shell 20 and the pump groove pressure pipeline 10 jointly form an annular flow passage 30 communicated with the liquid flow inlet 11 and the liquid flow outlet 12 and used for flowing liquid metal.
In order to reduce the fluid resistance, one side end surface 22 of the pump channel inner housing 20 corresponding to the liquid flow inlet 11 is a cambered surface. The cambered surface is located radially inward of the pumping channel pressure duct 10, and has a predetermined distance from a plane where the liquid inlet 11 of the pumping channel pressure duct 10 is located, so that the liquid metal entering the liquid inlet 11 can uniformly flow into the annular flow channel 30 through the cambered surface.
The electromagnetic driving device is used for providing electromagnetic force (i.e. lorentz force) for driving the liquid metal to flow in the annular flow passage 30. In other words, the electromagnetic drive is configured to provide an electromagnetic force that drives the liquid metal from the fluid inlet 11 to the fluid outlet 12. During the use of the liquid metal electromagnetic pump 100, the liquid metal with high temperature is driven by the electromagnetic driving device to flow into the annular flow channel 30 from the liquid inlet 11 and flow out from the liquid outlet 12, so as to realize the pumping action on the liquid metal.
In some embodiments, the electromagnetic drive may comprise: an outer stator core 41 and a plurality of outer coils 42 disposed radially outward of the pump channel pressure pipe 10. The outer stator core 41 extends in the axial direction thereof radially outside the pump channel pressure pipe 10.
The outer stator core 41 is provided with a plurality of winding slots along its length. Each outer coil 42 is correspondingly disposed in one winding slot of the outer stator core 41.
In particular, in the present embodiment, the at least one external coil 42 is configured to transfer heat to the pump channel pressure conduit 10 either directly or indirectly through a heat transfer medium. In other words, in the embodiment of the present application, a thermal insulation layer for reducing heat transfer is not disposed between the outer coil 42 and the pumping channel pressure pipe 10, so that the heat of the outer coil 42 can be transferred to the pumping channel pressure pipe 10, and the liquid metal flowing inside the annular flow passage 30 is used to carry away the heat of the outer coil 42, so as to cool the outer coil 42.
In some embodiments, each external coil 42 is configured to transfer heat to the pump channel pressure conduit 10 either directly or indirectly through a heat transfer medium.
In some embodiments, the outer coil 42 directly faces the pump channel pressure conduit 10, and a gap exists between the outer coil 42 and the pump channel pressure conduit 10, the gap having a gas therein, the outer coil 42 transferring heat to the pump channel pressure conduit 10 by thermal radiation and the gas in the gap. It will be readily appreciated that in these embodiments, the external coil 42 and the pump channel pressure conduit 10 are not in contact with each other, nor are any structural members disposed therebetween, and heat is transferred from the external coil 42 to the pump channel pressure conduit 10 solely by thermal radiation and the gas within the gap.
In some embodiments, the gap may be, for example, 0.1-2mm, and the outer coil 42 may utilize the gas within the gap to conduct heat to the pump channel pressure tube 10, while also utilizing thermal radiation to transfer heat to the pump channel pressure tube 10.
In other embodiments, the external coil 42 is in thermally conductive contact with the pump channel pressure conduit 10. In this context, the "thermally conductive contact" of the a-part and the B-part may be understood as the direct contact of the a-part and the B-part to enable heat transfer between the a-part and the B-part; it can also be understood that the component A is indirectly contacted with the component B through the heat-conducting member, so that the heat transfer between the component A and the component B is realized.
It will be readily appreciated that in some embodiments, all of the outer coils 42 are in thermally conductive contact with the pump channel pressure conduit 10. In some embodiments, all of the outer coils 42 are directly facing the pump channel pressure conduit 10, and there is a gap between all of the outer coils 42 and the pump channel pressure conduit 10. In some embodiments, a portion of the outer coil 42 directly faces the pump channel pressure conduit 10, and a gap exists between the portion of the outer coil 42 and the pump channel pressure conduit 10, wherein a gas is present in the gap; another portion of the external coil 42 is in thermally conductive contact with the pump channel pressure conduit 10.
In the present embodiment, the external coil 42 may be a high temperature resistant coil. The temperature resistance level of the external coil 42 can reach more than 200 ℃. For example, the outer coil 42 may withstand high temperatures above 250 ℃. In some embodiments, the temperature tolerance level of the outer coil 42 may be up to 300 ℃ or higher. In other embodiments, the temperature resistance of the outer coil 42 may be above 400 ℃ or even above 500 ℃.
In the embodiment of the present application, in order to ensure the reliability of the outer coil 42, the outer coil 42 can endure a temperature higher than that of the liquid metal flowing inside the annular flow passage 30. Thus, when the temperature of the outer coil 42 is higher than the temperature of the liquid metal flowing inside the annular flow passage 30, the outer coil 42 does not fail at a high temperature, and heat of the outer coil 42 can be transferred to the pump groove pressure pipe 10 and further to the flowing liquid metal due to heat transfer between the outer coil 42 and the pump groove pressure pipe 10.
The temperature to which the outer coil 42 is subjected may be selected in accordance with the temperature of the liquid metal. It will be readily appreciated that the higher the temperature resistance level of the outer coil 42, the higher the temperature of the liquid metal that it allows to flow inside the annular flow passage 30.
Taking liquid sodium as an example, when the temperature of the liquid sodium entering the annular flow passage 30 is 130 ℃, the external coil 42 may be a coil with a temperature resistance level of 200 ℃. When the temperature of the liquid sodium entering the annular flow passage 30 is 250 ℃, the external coil 42 should be selected to have a temperature resistance level of 300 ℃ or even above 400 ℃.
It will be readily appreciated that the present application is not concerned with improvements to the coil structure. The outer coil 42 may be formed of a high temperature resistant coil structure known in the art.
In the embodiment of the present application, since the heat of the outer coil 42 can be transferred to the liquid metal flowing in the annular flow passage 30, the heating power of the liquid metal in the whole liquid metal circulation loop can be reduced. In other words, the embodiment of the present application uses the heat generated by the external coil 42 to heat the liquid metal, so that energy is reasonably utilized, and energy consumption is reduced.
In some embodiments, the external coil 42 may be a three-phase winding coil. Accordingly, the number of winding slots and outer coils 42 may be an integer multiple of 3. The number of winding slots and outer coils 42 may be, for example, 6, 12, 18, 24, 48, etc. The external coil 42 may be connected by a delta circuit, and the external coil 42 is supplied with a current with a phase difference of 120 degrees, and the generated travelling magnetic field acts on the liquid metal medium to push the liquid metal to flow in the annular flow channel 30.
In some embodiments, outer stator core 41 is configured to transfer heat to pump channel pressure tube 10 either directly or indirectly through a heat transfer medium. Therefore, the heat of the external coil 42 can be transferred to the pump groove pressure pipe 10 through the external stator core 41, and the liquid metal flowing inside the annular flow passage 30 takes away the heat of the external coil 42 and the external stator core 41, thereby cooling the external coil 42 and the external stator core 41.
In some embodiments, the outer stator core 41 is in thermally conductive contact with the pump channel pressure pipe 10. In some embodiments, the outer stator core 41 directly faces the pump channel pressure pipe 10 (i.e., no thermal insulation layer is provided between the outer stator core 41 and the pump channel pressure pipe 10), and there is a gap between the outer stator core 41 and the pump channel pressure pipe 10, in which a gas is present, and the outer stator core 41 transfers heat to the pump channel pressure pipe 10 by thermal radiation and the gas in the gap.
Referring to fig. 3, in some embodiments, the outer stator core 41 includes a plurality of bar cores 411 extending in the axial direction of the pump channel pressure pipe 10, and the bar cores 411 are arranged at intervals in the circumferential direction of the pump channel pressure pipe 10 on the radially outer side thereof. In some embodiments, these bar-shaped iron cores 411 are arranged at equal intervals in the circumferential direction thereof radially outside the pump channel pressure pipe 10.
Each of the bar cores 411 is provided with a plurality of core slots along the axial direction or the length direction, and the core slots of the bar cores 411 at the same position in the axial direction jointly form one winding slot of the outer stator core 41.
In some embodiments, the number of the bar-shaped iron cores 411 may be an even number, and the even number of the bar-shaped iron cores 411 are uniformly distributed in the circumferential direction on the radially outer side of the pump gallery pressure pipe 10 so as to form a symmetrical magnetic field. In some embodiments, the number of the bar-shaped iron cores 411 is 18, and the 18 bar-shaped iron cores 411 are uniformly distributed in the circumferential direction on the radially outer side of the pump channel pressure pipe 10. In other embodiments, the number of the strip-shaped iron cores 411 may also be 4, 8, 10, 20, etc.
In some embodiments, the bar-shaped iron core 411 may be laminated by non-oriented silicon steel sheets.
In some embodiments, the electromagnetic drive further comprises: an inner stator core 43 and a plurality of inner coils 44 provided in the pump groove inner housing 20. In the embodiment of the present application, the stator core and the coil are disposed on the radially inner side and the radially outer side of the annular flow channel 30, so that the magnetic field strength provided by the electromagnetic driving device is significantly improved, and the pumping capacity of the liquid metal electromagnetic pump 100 is further improved. Compared with the traditional cylindrical induction type electromagnetic pump (namely, the stator and the coil are arranged on the radial outer side of the annular flow channel 30, and the stator and the coil are not arranged on the radial inner side), the efficiency of the double-stator type electromagnetic pump is remarkably improved (namely, the stator core and the coil are arranged on the radial inner side and the radial outer side of the annular flow channel 30), and the efficiency is improved by about 50%; is particularly suitable for occasions with large flow and medium and high lift.
It will be readily appreciated that the greater the flow rate pumped by the liquid metal electromagnetic pump 100, the more heat it generates. The liquid metal electromagnetic pump 100 of the embodiment of the present application can effectively dissipate heat of the inner coil 44 and the outer coil 42 by using the heat dissipation manner of the liquid metal in the annular flow channel 30 to dissipate heat of the coil, so that the liquid metal electromagnetic pump has a good heat dissipation effect and a good pumping capacity.
Similar to the outer coil 42, the inner coil 44 is also a high temperature resistant coil. It will be readily appreciated that in the present embodiment, to ensure the reliability of the inner coil 44, the inner coil 44 can withstand a temperature higher than the temperature of the liquid metal flowing inside the annular flow passage 30. Inner coil 44 may be of the same temperature resistant grade as outer coil 42 or may be of a different temperature resistant grade than outer coil 42.
Similar to the outer stator core 41, the inner stator core 43 is provided with a plurality of winding slots in the axial direction of the pump channel inner housing 20. Each inner coil 44 is arranged in one winding slot of the inner stator core 43.
In some embodiments of the present application, the at least one internal coil 44 is configured to transfer heat to the pump channel inner housing 20 either directly or indirectly through a heat transfer medium. Thus, the liquid metal flowing inside the annular flow passage 30 carries the heat of the inner coil 44, and cools the inner coil 44.
In some embodiments, each internal coil 44 is configured to transfer heat to the pump channel inner housing 20 either directly or indirectly through a heat transfer medium.
In some embodiments, the inner coil 44 directly faces the pump sump inner housing 20, and there is a gap between the inner coil 44 and the pump sump inner housing 20, in which a gas is present, the inner coil 44 transferring heat to the pump sump inner housing 20 by thermal radiation and the gas in the gap. It will be readily appreciated that in these embodiments, the internal coil 44 and the pump sump inner housing 20 are not in contact with each other, nor are any structural members disposed therebetween, and heat is transferred from the internal coil 44 to the pump sump inner housing 20 solely by thermal radiation and the gas within the gap.
In some embodiments, the gap may be, for example, 0.1-2mm, and the inner coil 44 may transfer heat to the pump channel inner housing 20 using gas in the gap, and may also transfer heat to the pump channel inner housing 20 using thermal radiation.
In some embodiments, the inner coil 44 is in thermally conductive contact with the side wall 21 of the housing 20 in the pump channel.
In some embodiments, the inner stator core 43 is configured to transfer heat to the pump channel inner housing 20 either directly or indirectly through a heat transfer medium. Therefore, the heat of the inner coil 44 can be transferred to the pump channel inner housing 20 through the inner stator core 43, and the liquid metal flowing inside the annular flow passage 30 is used for carrying away the heat of the inner coil 44 and the inner stator core 43, so as to cool the inner coil 44 and the inner stator core 43.
In some embodiments, the inner stator core 43 is in thermally conductive contact with the pump channel inner housing 20. In some embodiments, the inner stator core 43 directly faces the side wall 21 of the pump groove inner housing 20 (i.e., no thermal insulation layer is disposed between the inner stator core 43 and the side wall 21 of the pump groove inner housing 20), and there is a gap between the inner stator core 43 and the side wall 21 of the pump groove inner housing 20, in which a gas is present, and the inner stator core 43 transfers heat to the side wall 21 of the pump groove inner housing 20 by thermal radiation and the gas in the gap.
It will be readily appreciated that in some embodiments of the present application, the external coil 42 is configured to transfer heat to the pumping channel pressure pipe 10 either directly or indirectly through a heat transfer medium; while the inner coil 44 is configured to transfer heat to the pump channel inner housing 20, either directly or indirectly through a heat transfer medium, to transfer heat from the inner and outer coils 44, 42 to the liquid metal within the annular flow passage 30, which carries the heat from the inner and outer coils 44, 42 away from the annular flow passage 30.
In some embodiments, outer stator core 41 is configured to transfer heat to pump channel pressure tube 10 either directly or indirectly through a heat transfer medium; while the inner stator core 43 is also configured to transfer heat to the pump channel inner housing 20 either directly or indirectly through a heat transfer medium; the heat transferred to the inner and outer coils 44, 42 to the inner and outer stator cores 43, 41, respectively, is also transferred to the liquid metal in the annular flow passage 30, which carries the heat of the inner and outer coils 44, 42 away from the annular flow passage 30.
In some embodiments, the inner coil 44 and the inner stator core 43 are configured to transfer heat to the pump channel inner housing 20 either directly or indirectly through a heat transfer medium; while the outer coil 42 and the outer stator core 41 are configured to transfer heat to the pump channel pressure pipe 10 directly or indirectly through a heat transfer medium; also, the outer stator core 41 may also be configured to transfer heat to the "first cylinder 60" mentioned below, either directly or indirectly through a heat transfer medium, thereby facilitating the transfer of heat generated by the inner and outer coils 44, 42 to the liquid metal.
The inner stator core 43 may be mounted to the pump gallery inner housing 20 by an inner stator mounting 45. The mounting member 45 may be made of a material having good thermal conductivity, such as metal.
In some embodiments, the inner stator core 43 includes a plurality of axially extending bar cores 431, and the bar cores 431 are circumferentially spaced apart within the pump channel inner housing 20. In some embodiments, the bar cores 431 are arranged at equal intervals in the circumferential direction of the pump groove inner housing 20.
The number of the bar cores 431 of the inner stator core 43 may be the same as the number of the bar cores 411 of the outer stator core 41. The bar cores 431 of the inner stator core 43 may be disposed opposite to the bar cores 411 of the outer stator core 41. That is, each of the bar cores 431 of the inner stator core 43 is disposed facing one of the bar cores 411 of the outer stator core 41. The inner coil 44 may also be disposed opposite the outer coil 42.
It will be readily appreciated that in other embodiments of the present application, the stator and coil are not disposed radially inward of the annular flow passage 30, and the electromagnetic drive device comprises only: a stator core and a coil arranged on the radial outer side of the annular flow passage 30, and a magnetizer arranged on the radial inner side of the annular flow passage 30.
In some embodiments, the liquid metal electromagnetic pump 100 further comprises: a first cylinder 60 and a second cylinder 70. The first cylinder 60 is disposed radially outward of the outer stator core 41. The second cylinder 70 is disposed radially outwardly of the first cylinder 60, and the second cylinder 70 and the first cylinder 60 together form an outer annular flow passage 80 in communication with the spout 12 for receiving liquid metal from the spout 12. It will be readily appreciated that in such embodiments, the outer annular flow passage 80 is disposed axially at least partially around the outer stator core 41.
In some embodiments, the outer stator core 41 is configured to transfer heat to the first cylinder 60 directly or indirectly through a heat transfer medium. Accordingly, the heat of the outer coil 42 can be transferred to the first cylinder 60 through the outer stator core 41, and the liquid metal flowing inside the outer annular flow passage 80 carries away the heat of the outer coil 42 and the outer stator core 41, thereby cooling the outer coil 42 and the outer stator core 41.
In some embodiments, the outer stator core 41 is in thermally conductive contact with the first cylinder 60.
In some embodiments, the outer stator core 41 directly faces the first cylinder 60 (i.e., no thermal insulation layer is disposed between the outer stator core 41 and the first cylinder 60), and there is a gap between the outer stator core 41 and the first cylinder 60, and a gas is present in the gap, and the outer stator core 41 transfers heat to the first cylinder 60 by heat radiation and the gas in the gap.
In some embodiments, the outer stator core 41 is mounted to the first cylinder 60. Specifically, the outer stator core 41 is provided with connectors at both axial sides thereof, and the outer stator core 41 is mounted to the first cylinder 60 through the connectors. The connection member may be a metal member so as to transfer heat from the outer stator core 41 to the first cylinder 60.
In the embodiment of the present application, the liquid metal in the annular flow passage 30 is driven by electromagnetic force, and a larger outlet pressure is obtained at the liquid flow outlet 12. In order to maintain a steady outlet pressure of the liquid flow outlet 12, in some embodiments, the liquid metal electromagnetic pump 100 further comprises: an annular plenum 50 to stabilize the pressure of the liquid metal.
Referring to fig. 4, the annular plenum chamber 50 includes an inlet section 51 that interfaces with the fluid outlet 12 of the pump channel pressure conduit 10 and an outlet section 52 that interfaces with the inlet section 51. The radially outer wall 522 of the outlet section 52 is formed with a plurality of circumferentially distributed outlets 520, the outlet section 52 communicating with the outer annular flow passage 80 via the outlets 520. Wherein the inlet section 51 extends from the liquid flow outlet 12 of the pumping duct pressure conduit 10 towards the outlet section 52 in a diverging manner to reduce drag losses. As the liquid metal passes from the inlet section 51 into the outlet section 52, the pressure of the liquid metal is relieved and then flows into the outer annular channel 80 along the circumferential outlet 520.
In some embodiments, the two ends of the radially inner wall 511 of the inlet section 51 are respectively connected with the side wall 21 of the pump channel inner casing 20 and the radially inner wall 521 of the outlet section 52; the radially outer wall 522 of the outlet section 52 projects outwardly beyond the radially outer wall 512 of the inlet section 51. In such an embodiment, the radial width of the outlet section 52 is greater than the radial width of the annular channel 30 and greater than the radial width of the inlet section 51, which is more favorable to the pressure stabilizing effect of the liquid metal.
In some embodiments, the radially outer wall 522 of the outlet section 52 interfaces with the first barrel 60 such that liquid metal flowing from the outlet 520 of the outlet section 52 directly enters the outer annular runner 80. The end of the outlet section 52 remote from the inlet section 51 is flush with the corresponding end of the second cylinder 70, and the end face of the outlet section 52 remote from the inlet section 51 extends to meet the end of the second cylinder 70, thereby sealing one side of the outer annular flow passage 80.
The liquid metal electromagnetic pump 100 further includes: a protective casing 90 provided radially outside the second cylinder 70; a liquid outlet 92 communicating with the outer annular flow passage 80 is formed in the side wall of the protective casing 90, and the liquid metal entering the outer annular flow passage 80 flows out of the side of the electromagnetic liquid metal pump 100 through the liquid outlet 92.
In some embodiments, the pump channel pressure conduit 10 extends vertically such that the liquid metal electromagnetic pump 100 as a whole uses a vertical layout. The liquid flow inlet 11 of the pump channel pressure conduit 10 is located at the lower end and the liquid flow outlet 12 is located at the upper end. An annular plenum 50 is located above the pump gallery pressure conduit 10. The upper end of the containment vessel 90 extends radially outwardly to form a flange 91 for suspending the liquid metal electromagnetic pump 100.
It should also be noted that, in the case of the embodiments of the present invention, features of the embodiments and examples may be combined with each other to obtain a new embodiment without conflict.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention is subject to the scope of the claims.
Claims (16)
1. A liquid metal electromagnetic pump, comprising:
a pump channel pressure pipe having a liquid flow inlet for receiving liquid metal inflow and a liquid flow outlet for delivering liquid metal outward;
the pump ditch inner shell is arranged on the radial inner side of the pump ditch pressure pipeline, and the pump ditch inner shell and the pump ditch pressure pipeline jointly form an annular flow channel communicated with the liquid flow inlet and the liquid flow outlet and used for liquid metal to flow; and
an electromagnetic drive device for providing an electromagnetic force for driving the liquid metal to flow in the annular flow passage, the electromagnetic drive device comprising:
an outer stator core extending axially on a radially outer side of the pump gallery pressure line, the stator core having a plurality of winding slots along a length direction thereof; and
a plurality of outer coils, each of the outer coils being disposed in one of the winding slots of the outer stator core; wherein at least one of the external coils is configured to transfer heat to the pump channel pressure conduit directly or indirectly through a heat transfer medium.
2. A liquid metal electromagnetic pump according to claim 1, wherein each of the external coils is configured to transfer heat to the pumping channel pressure conduit either directly or indirectly through a heat transfer medium.
3. A liquid metal electromagnetic pump as claimed in claim 1 or claim 2, wherein the external coil directly faces the pump gallery pressure conduit with a gap therebetween, the external coil transferring heat to the pump gallery pressure conduit by thermal radiation and gas within the gap.
4. A liquid metal electromagnetic pump as claimed in claim 1 or claim 2, wherein the outer coil is in thermally conductive contact with the pump channel pressure conduit.
5. The liquid metal electromagnetic pump of claim 1, further comprising:
the first cylinder is arranged on the radial outer side of the external stator core; and
the second cylinder is arranged on the radial outer side of the first cylinder, and the second cylinder and the first cylinder jointly form an external annular flow channel communicated with the liquid flow outlet of the pumping duct pressure pipeline so as to receive the liquid metal from the liquid flow outlet.
6. A liquid metal electromagnetic pump according to claim 5, wherein the outer stator core is configured to transfer heat to the first cylinder either directly or indirectly through a heat transfer medium.
7. A liquid metal electromagnetic pump as claimed in claim 5, wherein the outer stator core is mounted to the first cylinder.
8. A liquid metal electromagnetic pump as claimed in claim 5, further comprising:
the annular pressure stabilizing cavity comprises an inlet section connected with a liquid flow outlet of the pump ditch pressure pipeline and an outlet section connected with the inlet section, a plurality of outlets distributed along the circumferential direction are formed on the radial outer wall of the outlet section, and the outlet section is communicated with the external annular flow channel through the plurality of outlets;
wherein the inlet section extends gradually from the liquid flow outlet towards the outlet section.
9. A liquid metal electromagnetic pump according to claim 8, wherein both ends of the radially inner wall of the inlet section are respectively connected with the side wall of the inner casing of the pump groove and the radially inner wall of the outlet section;
the radial outer wall of the outlet section protrudes outward beyond the radial outer wall of the inlet section.
10. A liquid metal electromagnetic pump as claimed in claim 9, wherein a radially outer wall of the outlet section meets the first cylinder.
11. The liquid metal electromagnetic pump of claim 8, further comprising: the protective shell is arranged on the radial outer side of the second cylinder;
and a liquid outlet communicated with the external annular flow passage is formed on the side wall of the protective shell.
12. A liquid metal electromagnetic pump as claimed in claim 11, wherein the pump trench pressure conduit extends vertically, and the annular plenum is located above the pump trench pressure conduit;
the upper end part of the protective shell extends outwards along the radial direction to form a flange used for suspending the liquid metal electromagnetic pump.
13. The electromagnetic liquid metal pump of claim 1, wherein an end surface of the pump groove inner casing corresponding to a liquid flow inlet of the pump groove pressure pipeline is a cambered surface.
14. A liquid metal electromagnetic pump as claimed in claim 1, wherein said electromagnetic drive further comprises:
the internal stator core is arranged in the pump groove inner shell, and a plurality of winding slots are formed in the internal stator core along the axial direction of the pump groove inner shell; and
a plurality of internal coils disposed within the pump gallery inner housing, each of the internal coils disposed within one of the winding slots of the inner stator core; wherein at least one of the internal coils is configured to transfer heat to the pump channel inner housing directly or indirectly through a heat transfer medium.
15. The liquid metal electromagnetic pump of claim 14, wherein the inner stator core is configured to transfer heat to the pump channel inner housing directly or indirectly through a heat transfer medium.
16. The liquid metal electromagnetic pump of claim 1, wherein the outer stator core is configured to transfer heat to the pump channel pressure conduit directly or indirectly through a heat transfer medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210333850.8A CN115001236B (en) | 2022-03-31 | 2022-03-31 | Liquid metal electromagnetic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210333850.8A CN115001236B (en) | 2022-03-31 | 2022-03-31 | Liquid metal electromagnetic pump |
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| Publication Number | Publication Date |
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| CN115001236A true CN115001236A (en) | 2022-09-02 |
| CN115001236B CN115001236B (en) | 2024-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210333850.8A Active CN115001236B (en) | 2022-03-31 | 2022-03-31 | Liquid metal electromagnetic pump |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06173848A (en) * | 1992-12-09 | 1994-06-21 | Toshiba Corp | Induction type electromagnetic pump |
| JP2004304893A (en) * | 2003-03-31 | 2004-10-28 | Toshiba Corp | Electromagnetic pump |
| CN201550008U (en) * | 2009-09-30 | 2010-08-11 | 石家庄爱迪尔电气有限公司 | Liquid metal transmission electromagnetic pump with outer core |
| CN210397249U (en) * | 2019-08-21 | 2020-04-24 | 深圳市欣普斯科技有限公司 | Micro pump |
| CN112803712A (en) * | 2021-01-29 | 2021-05-14 | 中国原子能科学研究院 | Liquid metal electromagnetic pump |
-
2022
- 2022-03-31 CN CN202210333850.8A patent/CN115001236B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06173848A (en) * | 1992-12-09 | 1994-06-21 | Toshiba Corp | Induction type electromagnetic pump |
| JP2004304893A (en) * | 2003-03-31 | 2004-10-28 | Toshiba Corp | Electromagnetic pump |
| CN201550008U (en) * | 2009-09-30 | 2010-08-11 | 石家庄爱迪尔电气有限公司 | Liquid metal transmission electromagnetic pump with outer core |
| CN210397249U (en) * | 2019-08-21 | 2020-04-24 | 深圳市欣普斯科技有限公司 | Micro pump |
| CN112803712A (en) * | 2021-01-29 | 2021-05-14 | 中国原子能科学研究院 | Liquid metal electromagnetic pump |
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| Publication number | Publication date |
|---|---|
| CN115001236B (en) | 2024-09-06 |
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