CN112928892B - Double-helix electromagnetic pump for driving conductive fluid to accelerate - Google Patents
Double-helix electromagnetic pump for driving conductive fluid to accelerate Download PDFInfo
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- 239000012530 fluid Substances 0.000 title claims abstract description 64
- 230000001133 acceleration Effects 0.000 claims description 10
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- 239000010959 steel Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
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- 230000008569 process Effects 0.000 description 2
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- 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
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Abstract
The invention provides a double-helix electromagnetic pump for driving conductive fluid to accelerate, which comprises: the conductive pump body is internally provided with a double-spiral-shaped convoluted flow channel, the double-spiral-shaped convoluted flow channel is divided into two spiral-shaped convoluted flow channels, and electrodes are respectively arranged on the two spiral-shaped convoluted flow channels; two the electrode links to each other with DC power supply's positive negative pole respectively, install import pipe and outlet pipe on the pump body, the interior expert of two helices shape runner that circles round has conductive fluid, perpendicular to install magnet and lower magnet in the planar direction of two helices shape runner that circles round, go up the magnet with lower magnet passes through the yoke centre gripping on the pump body, and when putting through external power supply, the conductive fluid who is in two helices shape runner that circles round can receive the continuous drive effect of electromagnetic force to show promotion conductive fluid's driving force.
Description
Technical Field
The invention relates to the technical field of conductive fluid rotary accelerating pumps, in particular to a double-helix electromagnetic pump for driving conductive fluid to accelerate.
Background
In recent years, with the rapid development of industries such as chemical industry, casting, nuclear industry and the like, the transportation of conductive fluids is more and more important. Among them, electromagnetic pumps have been used to transport liquid metals having high electrical conductivity. Their advantage is the absence of moving and sealing parts, eliminating the possibility of leakage and wear compared to mechanical pumps.
The existing electromagnetic pump mainly comprises an electric conduction type electromagnetic pump and an alternating current induction type electromagnetic pump. The conductive electromagnetic pump is divided into a direct current conductive electromagnetic pump and an alternating current conductive electromagnetic pump, wherein the direct current conductive electromagnetic pump drives a conductive fluid to flow by directly applying direct current to the conductive fluid under the action of a magnetic field. The direct current conductive electromagnetic pump can be divided into a rectangular type, a cylindrical type and a spiral type according to the type of a flow channel, and has the problems of low pressure head, small flow, large current supply, large electrode contact resistance and the like although the direct current conductive electromagnetic pump has high efficiency and a simple and compact structure.
Chinese patent application No. 201010608825.3 discloses a rotary acceleration pump for driving a conductive fluid to flow, in which a rotary flow channel is provided inside the pump, and the conductive fluid in the flow channel is driven to flow in an accelerated manner under the combined action of a pair of electrode plates penetrating through the axial whole course wall surface of the flow channel and a pair of magnets perpendicular to the electrode plates. The straight-line flow channel of the direct-current electromagnetic pump is bent and coiled into a spiral flow channel, and the flow channel can be regarded as a single-flow-channel structure, so that the volume of the pump is reduced to a certain extent. When the input current and the external magnetic field are both set to be the same, the electromagnetic driving force generated by the two flow channels is the same, so that the problem of low driving pressure head of the direct current electromagnetic pump is not solved, and the arrangement of the electrode plates also has certain difficulty.
Chinese patent application No. 201010572953.7 discloses a high-pressure liquid metal electromagnetic pump, which includes: electromagnetic core and the liquid metal runner of clamp between electromagnetic core and the solenoid that the cover was established on electromagnetic core, liquid metal runner are space heliciform and arrange, and high temperature liquid metal flows with higher speed under the electromagnetic force drive that solenoid and electromagnetic core formed, and its structure is complicated, and is inefficient, is unfavorable for practical application.
Disclosure of Invention
The invention provides a double-helix electromagnetic pump for driving conductive fluid to accelerate, which is used for solving the problems of insufficient driving force and pressure head, small flow and large current supply of the electromagnetic pump in the prior art and optimizing the structural arrangement of the electromagnetic pump.
The invention provides a double-helix electromagnetic pump for driving conductive fluid to accelerate, which comprises: the conductive pump body is internally provided with a double-spiral-shaped convoluted flow channel, the double-spiral-shaped convoluted flow channel is divided into two spiral-shaped convoluted flow channels, and electrodes are respectively arranged on the two spiral-shaped convoluted flow channels; the two electrodes are respectively connected with the positive electrode and the negative electrode of a direct-current power supply, an inlet pipe and an outlet pipe are installed on the pump body, conductive fluid is communicated in the double-spiral-shaped rotary flow channel, an upper magnet and a lower magnet are installed in the direction perpendicular to the plane of the double-spiral-shaped rotary flow channel, and the magnets are clamped on the pump body through a magnet yoke.
According to the double-helix electromagnetic pump for driving the conductive fluid to accelerate, the double-helix rotary flow channel is in a helix shape gradually spreading around two electrodes, the outer rings of the two spiral rotary flow channels are communicated, and the number of the rings of a single spiral rotary flow channel is 1-1000. When the input current is fixed, the electromagnetic driving force is linearly enhanced along with the increase of the number of the rings of the spiral rotary flow channel, so that the electromagnetic driving force of the conductive fluid is remarkably improved.
According to the double-helix electromagnetic pump for driving the conductive fluid to accelerate, the double-helix convoluted flow channel is in a central symmetrical pattern, when the direction of a magnetic field or the direction of current is changed, the conductive fluid can flow in the reverse direction, and the driving efficiency is the same as that of forward electromagnetic driving.
According to the double-helix electromagnetic pump for driving the conductive fluid to accelerate, the electrodes are strip-shaped electrodes, so that the current is uniformly distributed on the area between the electrodes.
According to the double-helix electromagnetic pump for driving the conductive fluid to accelerate, the upper magnet and the lower magnet are respectively composed of 1-1000 dispersed magnets.
According to the double-helix electromagnetic pump for driving the conductive fluid to accelerate, provided by the invention, the outlet pipe and the inlet pipe are respectively positioned on the two strip-shaped electrodes, and the inlet pipe and the outlet pipe penetrate through the strip-shaped electrodes and are positioned on two sides of the upper magnet.
According to the double-helix electromagnetic pump for driving the conductive fluid to accelerate, the double-helix convoluted flow channel is made of non-magnetic steel, copper or a non-magnetic conductor material and is used for conducting current between two electrodes.
According to the double-helix electromagnetic pump for driving the conductive fluid to accelerate, the magnetic circuit is changed through the magnetic yoke, the magnetic leakage is reduced, and the electromagnetic driving force of the conductive fluid is greatly improved.
When the double-helix electromagnetic pump for driving the conductive fluid to accelerate is connected with an external power supply and is under the dual actions of an external magnetic field (from an upper magnet and a lower magnet) and current (from two electrodes), the conductive fluid in the double-helix rotary flow channel can continuously bear electromagnetic driving force along the flowing direction, so that the flowing speed and the driving pressure of the conductive fluid are obviously improved. When the input current and the external magnetic field are both set to be the same, compared with the traditional direct current electromagnetic pump, the double-helix electromagnetic pump can provide electromagnetic driving force which is 2N (the number of helical flow channels) times.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a three-dimensional structure of a double-helix electromagnetic pump for driving a flow of a conductive fluid, provided by the invention;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken along line C-C of FIG. 1;
reference numerals:
1: a pump body; 2: an electrode; 3: a direct current power supply;
4: an outlet pipe; 5: an inlet pipe; 6: a pump body end cover;
7: an upper magnet; 8: a lower magnet; 9: a double-spiral rotary flow passage;
10: an electrically conductive fluid; 11: and a magnetic yoke.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A double-helix electromagnetic pump for driving acceleration of a conductive fluid according to the present invention is described below with reference to fig. 1 to 4, and includes: the pump body 1 is internally provided with a double-spiral-shaped convoluted flow channel 9, the double-spiral-shaped convoluted flow channel 9 is divided into two spiral-shaped convoluted flow channels, and electrodes are respectively arranged on the two spiral-shaped convoluted flow channels; the two electrodes are arranged at the centers of the two spiral rotary flow channels, the two electrodes penetrate through and extend out of the upper end face of the pump body 1, the two electrodes are respectively connected with the positive electrode and the negative electrode of the direct current power supply 3, the direct current power supply 3 is connected with a control program, the direct current power supply 3 is controlled by the control program to control the electromagnetic pump, an inlet pipe 5 and an outlet pipe 4 are arranged on the pump body 3, a conductive fluid 10 is communicated in the double-spiral rotary flow channel 9, the conductive fluid 10 enters the double-spiral rotary flow channel 9 from the inlet pipe 5 and flows out from the outlet pipe 4, an upper magnet 7 and a lower magnet 8 are arranged in the direction perpendicular to the plane of the double-spiral rotary flow channel 9, and the upper magnet 7 and the lower magnet 8 are clamped on the pump body 1 through a magnetic yoke 11. The upper magnet 7 and the lower magnet 8 adopt permanent magnets or electromagnets.
The double-spiral-shaped rotary flow channel 9 is in a spiral shape gradually spreading around the two electrodes, the outer rings of the two spiral-shaped rotary flow channels are communicated, and the number of the rings of a single spiral-shaped rotary flow channel is between 1 and 1000.
The double-spiral-shaped convoluted flow channel 9 is square, rectangular, circular or elliptical in shape, wherein transition fillets are arranged at corners of the square and rectangular flow channels to reduce flow resistance.
The cross section of the double-spiral rotary flow passage 9 is square, rectangular, circular or elliptical, and the area of the cross section is 0.01cm2～10cm2。
The double-spiral rotary flow channel 9 is in a centrosymmetric pattern, when the direction of a magnetic field or the direction of current is changed, the conductive fluid 10 can realize reverse flow, and the driving efficiency is the same as that of forward electromagnetic driving. When the direction of the external current or the direction of the magnetic field is changed, the current can flow in from the outlet pipe 4 and flow out from the inlet pipe 5 to finish the reverse flow, and the effect and the working efficiency of the forward flow and the reverse flow are the same.
The electrodes are strip-shaped electrodes 2 so that the current is evenly distributed over the area between the electrodes. The strip-shaped electrode 2 has a square, rectangular, elliptical or square or rectangular cross-sectional area of 0.1cm2～100cm2。
The upper magnet 7 and the lower magnet 8 are each composed of 1 to 1000 discrete magnets.
The outlet pipe 4 and the inlet pipe 5 are respectively positioned on the two strip-shaped electrodes 2, and the inlet pipe 5 and the outlet pipe 4 penetrate through the strip-shaped electrodes 2 and are positioned on two sides of the upper magnet 7. The inlet pipe 5 and the outlet pipe 4 are both communicated with the center of the double-spiral-shaped convoluted flow channel 9, and a rectangular magnetic field vertical to the plane of the double-spiral-shaped flow channel is formed between the two strip-shaped electrodes 2 by the magnet.
The double-spiral rotary flow channel 9 is made of nonmagnetic steel, copper or nonmagnetic conductor material and is used for conducting current between the two electrodes.
The lower surface of the pump body 1 is a double-spiral-shaped convoluted flow channel 9, and a groove is formed in the center of the double-spiral-shaped convoluted flow channel and extends out of the upper surface of the pump body 1 to fix two strip-shaped electrodes; the pump body 1 is generally made of a metal conductor material with good conductivity and low magnetic permeability, such as non-magnetic steel, copper or a non-magnetic conductor material, the strip-shaped electrode 2 is fixed in a groove on the lower surface of the pump body 1 and penetrates through and extends out of the upper surface of the pump body 1, and a threaded hole is formed in the strip-shaped electrode 2 to be connected with the inlet pipe 5 and the outlet pipe 4; after the conductive fluid 10 flows into the pump body 1 from the inlet pipe 5 through the strip electrodes 2, the conductive fluid is driven by electromagnetic force generated by the combination of the upper magnet 7, the lower magnet 8 and the two strip electrodes 2 to start accelerating and flow to the outside along the left spiral rotary flow channel, then enters the outer side of the right spiral rotary flow channel, flows into the center of the right spiral rotary flow channel, and flows out of the electromagnetic pump through the other strip electrode 2 and the outlet pipe 4; the width of the double-spiral rotary flow channel 9 can be 1mm to 50cm, and the length can be 10mm to 1000 cm; the upper magnet 7 and the lower magnet 8 are respectively arranged on the upper surface of the pump body 1 and the lower surface of the pump body end cover 6, and the upper magnet 7 and the lower magnet 8 are not in direct contact with the conductive fluid 10.
The double-helix electromagnetic pump for driving the flow of the conductive fluid is characterized in that: when an external power supply is connected, the conductive fluid 10 in the double-spiral convoluted flow channel 9 is continuously driven by electromagnetic force, so that the conductive fluid 10 flows out from the inlet pipe 5 to the outlet pipe 4 and has a higher driving pressure. The double helix shape enables the conductive fluid 12 to flow in or out from the center of the spiral flow channel, when the direction of the external current or the direction of the magnetic field is changed, the current can flow in from the outlet pipe 4 and flow out from the inlet pipe 5 to complete the reverse flow, and the effect and the working efficiency of the forward flow and the reverse flow are the same.
The double-helix electromagnetic pump for driving the flow of the conductive fluid is manufactured as follows:
the pump body 1 is provided with a double-spiral rotary flow channel 9 and a groove for fixing the strip-shaped electrode 2 on the lower surface thereof in a machining mode; the two strip electrodes 2 are respectively placed in the grooves on the surface of the pump body 1; threads are processed at one end of the inlet pipe 5 and one end of the outlet pipe 4, the inlet pipe 5 is connected to the pump body 1 through the threads and the strip-shaped electrode 2, and the outlet pipe 4 is connected to the pump body 1 through the threads and the other strip-shaped electrode 2; the pump body end cover 6 is connected with the pump body 1 through bolts, and plays a role in sealing the double-spiral rotary flow channel; the upper magnet 7 and the lower magnet 8 are clamped on the pump body 1 through the magnet yoke 11, and thus the double-helix electromagnetic pump is manufactured.
The pump body 1 of the embodiment is made of non-magnetic steel or non-magnetic conductor materials, the double-spiral convolute flow channel 9 is arranged on the lower surface of the pump body 1, and the height of the flow channel is as small as possible, so that the magnetic gaps of the upper magnet 7 and the lower magnet 8 are as small as possible, and the field intensity is as large as possible; the strip-shaped electrodes 2 are arranged into an involute double-spiral convolution flow channel in a convolution mode by taking the strip-shaped electrodes 2 as centers, and smooth transition fillets are arranged at the corners to reduce resistance loss. The upper magnet 7 and the lower magnet 8 are clamped on the pump body 1 through a magnetic yoke 11, and insulating layers (not shown in the figure) exist between the upper magnet 7 and the upper surface of the pump body 1 and between the lower magnet 8 and the pump body end cover 6 to insulate the magnets from the conductive fluid 10. The magnetic field direction of the magnet pair (the upper magnet 7 and the lower magnet 8) arranged on the pump body 1 is vertical to the double-spiral rotary flow channel 9 and the current direction between the two strip-shaped electrodes 2.
The working process of the invention is as follows: the double-spiral-shaped rotary flow channel 9 between the pump body 1 and the pump body end cover 6 is positioned between the upper magnet 7 and the lower magnet 8, when direct current is conducted to the electrode pair (two strip-shaped electrodes 2) positioned in the center of the double-spiral-shaped rotary flow channel 9, current is generated in the direction perpendicular to the magnetic field, and therefore electromagnetic force capable of pushing the conductive fluid 10 to accelerate flow is achieved, the direction of the electromagnetic force is determined by the magnetic field and the direction of the current, in the design of the invention, the direction of the electrode pair and the direction of the current are shown in fig. 4, and the direction of the magnet pair and the direction of the magnetic field are shown in fig. 3, and in the arrangement mode, the driving force borne by the conductive fluid 10 is always along the direction of the flow channel. Therefore, the conductive fluid 10 is continuously accelerated in the region between the electrode pairs from the inlet pipe 5, and freely flows along the flow channel in the region outside the electrode pairs, and the conductive fluid 10 reaches the outlet pipe 4 with a high driving pressure, so that the efficiency of transporting the conductive fluid can be improved. The electromagnetic pump is convenient to use, only the inlet pipe 5 and the outlet pipe 4 of the electromagnetic pump need to be connected to a fluid flow channel to be driven, the conductive fluid 10 is filled in the flow channel in the whole process, and then the electrode pairs are powered by the corresponding direct current power supply according to the transportation direction of the conductive fluid 10, so that the electromagnetic driving force can be generated, and the purpose of accelerating the driving of the fluid is achieved.
The working principle of the invention is as follows: the DC electromagnetic pump consists of three main parts, electrode, permanent magnet and pump pipe. The conductive fluid drive in the pump tube is provided by electromagnetic forces generated by the vector product of the current and the magnetic field. The total electromagnetic driving force F can be approximated by:
F＝2N×I×B
wherein: i-input Current [ A ]
B-magnetic flux density [ T ]; number of N-spiral flow passages
When the input current and the external magnetic field are both set to be the same, the electromagnetic driving force provided by the traditional direct current electromagnetic pump can be approximate to F ═ I × B, so that the double-helix electromagnetic pump can provide the electromagnetic driving force which is approximately 2N times that of the traditional direct current electromagnetic pump. It should be noted that the double-helix electromagnetic pump of the present invention increases the flow resistance to some extent due to the double-helix flow channel structure, but can provide a higher flow driving pressure head as a whole due to the significant enhancement of the electromagnetic driving force.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A twin-screw electromagnetic pump for driving acceleration of an electrically conductive fluid, comprising: the double-spiral-shaped rotary flow channel is divided into two spiral-shaped rotary flow channels, electrodes are respectively arranged on the two spiral-shaped rotary flow channels, the double-spiral-shaped rotary flow channel is in a spiral shape gradually expanding around the two electrodes, and outer rings of the two spiral-shaped rotary flow channels are communicated; the two electrodes are respectively connected with the positive electrode and the negative electrode of a direct-current power supply, an inlet pipe and an outlet pipe are installed on the pump body, conductive fluid is communicated in the double-spiral-shaped rotary flow channel, an upper magnet and a lower magnet are installed in the direction perpendicular to the plane of the double-spiral-shaped rotary flow channel, and the upper magnet and the lower magnet are clamped on the pump body through magnet yokes.
2. The twin-screw electromagnetic pump for driving acceleration of conductive fluid according to claim 1, characterized in that the number of rings of a single spiral-shaped convoluted flow passage is between 1 and 1000.
3. The double-helix electromagnetic pump for driving the acceleration of the conductive fluid according to claim 2, wherein the double-helix convoluted flow channel is in a central symmetry pattern, when the direction of the magnetic field or the direction of the current is changed, the conductive fluid can flow in the reverse direction, and the driving efficiency is the same as that of the forward electromagnetic driving.
4. The double-helix electromagnetic pump for driving acceleration of conductive fluid according to claim 1, characterized in that the electrodes are strip-shaped electrodes so that the current is evenly distributed over the area between the electrodes.
5. The double-helix electromagnetic pump for driving acceleration of an electrically conductive fluid according to claim 1, wherein the upper and lower magnets are each comprised of 1-1000 discrete magnets.
6. The twin-screw electromagnetic pump for driving acceleration of electrically conductive fluid according to claim 4, characterized in that the outlet pipe and the inlet pipe are respectively located on two bar electrodes, and the inlet pipe and the outlet pipe are located on both sides of the upper magnet through the bar electrodes.
7. The double-helix electromagnetic pump for driving acceleration of conductive fluid according to any one of claims 1 to 6, wherein the material of the double-helix convoluted flow channel is a non-magnetic conductor material.
8. The double-helix electromagnetic pump for driving acceleration of conductive fluid according to claim 7, wherein the material of the double-helix convoluted flow channel is non-magnetic steel or copper.
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| CN205829442U (en) * | 2016-07-07 | 2016-12-21 | 北京态金科技有限公司 | A kind of spiral accelerating type liquid metal electromagnetic pump |
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| CN108711961A (en) * | 2018-05-28 | 2018-10-26 | 中国农业大学 | Electromagnetic pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH205249A (en) * | 1938-12-05 | 1939-06-15 | Bbc Brown Boveri & Cie | Cyclotron. |
| US4212592A (en) * | 1978-10-31 | 1980-07-15 | General Electric Company | Electromagnetic pump for molten metals |
| JP4995234B2 (en) * | 2008-12-26 | 2012-08-08 | 株式会社ヂーマグ | Non-ferrous metal melt pump and non-ferrous metal melting furnace using the same |
| CA2703389C (en) * | 2010-05-07 | 2015-04-28 | Dan Paval | Gear pump |
| CN104632568B (en) * | 2013-11-08 | 2017-01-04 | 中国石油天然气股份有限公司 | Continuous oil sludge conveying method and device for single-cylinder bidirectional piston pump |
| KR101908115B1 (en) * | 2016-10-28 | 2018-10-15 | 울산과학기술원 | Electromagnetic pump |
| CN111865039B (en) * | 2020-07-23 | 2021-05-28 | 中国科学院电工研究所 | Double-helix combined type channel direct-current magnetofluid pump |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205829442U (en) * | 2016-07-07 | 2016-12-21 | 北京态金科技有限公司 | A kind of spiral accelerating type liquid metal electromagnetic pump |
| CN106300880A (en) * | 2016-10-11 | 2017-01-04 | 东南大学 | A kind of multiple degrees of freedom magnetic fluid push type underwater hovering particle group system |
| CN108711961A (en) * | 2018-05-28 | 2018-10-26 | 中国农业大学 | Electromagnetic pump |
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