CN112260513A - Integrated permanent-magnet liquid metal electromagnetic pump - Google Patents
Integrated permanent-magnet liquid metal electromagnetic pump Download PDFInfo
- Publication number
- CN112260513A CN112260513A CN202010995831.2A CN202010995831A CN112260513A CN 112260513 A CN112260513 A CN 112260513A CN 202010995831 A CN202010995831 A CN 202010995831A CN 112260513 A CN112260513 A CN 112260513A
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- CN
- China
- Prior art keywords
- liquid metal
- rotor
- permanent magnet
- electromagnetic pump
- iron yoke
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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
- H02K44/06—Induction pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
Abstract
The invention discloses an integrated permanent magnet type liquid metal electromagnetic pump which comprises a stator iron yoke, a three-phase winding coil, a rotor permanent magnet, a rotor supporting structure, a rotor rotating shaft, a liquid metal flow channel and an external iron yoke. When three-phase alternating current is conducted in the three-phase winding coil, a rotating magnetic field is formed between the stator iron yoke and the rotor permanent magnet, the rotor permanent magnet fixed on the rotor is subjected to magnetic field force in the rotating magnetic field, the rotor rotates along with the rotating magnetic field, a radial magnetic field formed in the flow channel between the rotating rotor permanent magnet and the external iron yoke rotates, induced eddy current is generated in liquid metal in the flow channel, the liquid metal generates ampere force under the combined action of the eddy current and the magnetic field formed between the rotor permanent magnet and the external iron yoke, and the liquid metal is driven to move towards the circumferential direction. The integrated permanent magnet type liquid metal electromagnetic pump is suitable for driving liquid metal to flow, such as sodium, lithium, lead-bismuth alloy, sodium-potassium alloy and the like.
Description
Technical Field
The invention relates to the field of liquid metal driving equipment, in particular to an integrated permanent magnet type liquid metal electromagnetic pump.
Background
With the development of the fourth generation nuclear reactor and the space reactor technology, reactors using liquid metal as a coolant are increasingly researched and applied, such as a lead bismuth fast reactor, a sodium-cooled fast reactor, and a space reactor using a sodium-potassium alloy as a coolant. The experimental research on the thermal and hydraulic characteristics of the liquid metal at home and abroad is developed towards large-scale and extreme working conditions, and the development trends put higher requirements on the driving equipment of the liquid metal and require that an electromagnetic pump has higher temperature resistance and a larger output pressure head. The maximum working temperature of the existing linear induction electromagnetic pump is greatly limited, usually 400 ℃, because the insulation problem at high temperature needs to be considered. And for liquid metal with high resistivity, such as lead-bismuth alloy, sodium-potassium alloy and the like, the transmission efficiency of the linear induction type electromagnetic pump is very low, and the requirement of experimental research cannot be met. Based on the problems, the invention provides the liquid metal electromagnetic pump with high temperature resistance and high efficiency by combining the working characteristics of the permanent magnet electromagnetic pump.
Disclosure of Invention
Aiming at the driving requirement of high-temperature liquid metal, the invention provides an integrated permanent magnet type liquid metal electromagnetic pump which can efficiently transmit the high-temperature liquid metal.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated permanent magnet type liquid metal electromagnetic pump comprises a stator consisting of a stator iron yoke 1 and a three-phase winding coil 2, a rotor consisting of a rotor permanent magnet 3, a rotor supporting structure 4 and a rotor rotating shaft 5, a liquid metal runner 6 and an external iron yoke 7; the stator iron yoke 1 is formed by stacking silicon steel sheets, and a certain number of teeth are processed on the stator iron yoke 1; the three-phase winding coil 2 is wound on the teeth of the stator iron yoke 1, and the wiring sequence of the three-phase winding coil 2 is AZBXCY so as to form a rotating magnetic field; the rotor permanent magnet 3 is arc-shaped, is fixed on the inner circumference of the rotor supporting structure 4 and is positioned on the outer circumference of the stator iron yoke 1, the magnetic field direction of the rotor permanent magnet 3 is along the radial direction, and the N poles and the S poles of the plurality of rotor permanent magnets alternately face the center of the rotor rotating shaft 5; the rotor rotating shaft 5 is connected with the rotor supporting structure 4; the liquid metal runner 6 is arranged outside the rotor, and the outer iron yoke 7 is arranged outside the liquid metal runner 6; when three-phase alternating current is conducted in the three-phase winding coil 2, a rotating magnetic field is formed between the stator iron yoke 1 and the rotor permanent magnet 3, the rotor permanent magnet 3 fixed on the rotor is subjected to magnetic field force in the rotating magnetic field, the rotor rotates along with the rotating magnetic field, a radial magnetic field formed between the rotating rotor permanent magnet 3 and the external iron yoke 7 in the liquid metal flow channel 6 rotates, induced eddy current is generated in the liquid metal flow channel 6, the liquid metal generates ampere force under the combined action of the induced eddy current and the magnetic field formed between the rotor permanent magnet 3 and the external iron yoke 7, and the liquid metal is driven to move in the liquid metal flow channel 6 along the outlet direction.
The number of teeth of the stator iron yoke 1 is an integral multiple of six, such as 6, 12, 18, 24 and the like, the number of the rotor permanent magnets 3 is one third of the number of teeth, and when the number of teeth is 18, the number of the permanent magnets is 6
The frequency of alternating current in the three-phase winding coil 2 is 5-200Hz, the frequency is controlled by a frequency converter, and the output pressure of the electromagnetic pump is different under different frequencies, so that the output pressure of the electromagnetic pump is controlled by controlling the output frequency of the frequency converter.
The rotor permanent magnet 3 is made of samarium cobalt, the maximum working temperature of the samarium cobalt is 350 ℃, when the rotor rotates at a high speed, the heat convection coefficient of the rotor permanent magnet and air is greatly increased, the rotor permanent magnet 3 can work in a safe temperature range, and a heat insulation layer with high heat resistance is arranged outside the liquid metal runner 6 and the external iron yoke 7, so that the heat transfer of high-temperature fluid to the rotor of the electromagnetic pump is reduced, and the electromagnetic pump can drive the liquid metal at 0-600 ℃.
The external iron yoke 7 is made of ferromagnetic material, such as pure iron or silicon steel sheet, and is aimed at improving the magnetic induction intensity in the liquid metal flow channel 6, further increasing the eddy current and ampere force, and improving the efficiency of the electromagnetic pump.
The electromagnetic pump can realize self-heating of the liquid metal runner, when the electromagnetic pump works, the rotor rotates, eddy current is formed in the wall of the liquid metal runner to generate heat, and self-heating can be realized.
Compared with the prior art, the invention has the following advantages:
(1) compared with the traditional induction type electromagnetic pump, the integrated permanent magnet type liquid metal electromagnetic pump does not need to consider the insulation problem at high temperature, and has higher operation temperature; in order to improve efficiency, the three-phase winding is arranged outside the high-temperature runner, the environment temperature of the three-phase winding is high, and large current in the winding can also generate a large amount of heat, so that electrical insulation at high temperature is a problem which needs to be considered, and the maximum operating temperature of the linear induction type electromagnetic pump is 400 ℃;
(2) the traveling wave magnetic field in the flow channel of the integrated permanent magnet type liquid metal electromagnetic pump is generated by driving the permanent magnet by the prime motor, and the pump has the advantages of simple structure, small size and high efficiency. The traveling wave magnetic field of the traditional induction type electromagnetic pump is obtained by the induction of a winding coil, the transmission efficiency is low, and the output pressure head is small.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention; FIG. 2 is a schematic view of a stator iron yoke according to the present invention; FIG. 3 is a schematic view of the polarity of a permanent magnet according to the present invention; FIG. 4 is a schematic view of a rotor of the present invention;
wherein, 1 is a stator iron yoke; 2 is a three-phase winding coil; 3 is a rotor permanent magnet; 4, a rotor supporting structure; 5 is a rotor rotating shaft; 6 is a liquid metal runner; and 7 is an outer iron yoke.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1, the present invention is an integrated permanent magnet type liquid metal electromagnetic pump, including: a stator iron yoke 1; a three-phase winding coil 2; a rotor permanent magnet 3; a rotor support structure 4; a rotor shaft 5; a liquid metal flow channel 6; an outer iron yoke 7. As shown in fig. 2, the stator iron yoke 1 is formed by stacking high permeability silicon steel sheets to reduce the iron loss of the electromagnetic pump, the three-phase winding coil 2 is wound on the teeth of the stator iron yoke 1, the wiring sequence of the three-phase winding coil is AZBXCY, the stator iron yoke 1 and the three-phase winding coil 2 form the stator of the integrated permanent magnet liquid metal electromagnetic pump, when the electromagnetic pump works, three-phase alternating current is conducted in the three-phase winding coil 2, and then a rotating magnetic field is generated; as shown in fig. 3, the rotor permanent magnet 3 is fixed on the rotor support structure 4, the N pole and the S pole of the rotor permanent magnet are alternately arranged, and the rotor rotating shaft 5 is connected with the rotor support structure 4; as shown in fig. 4, the rotor permanent magnet 3, the rotor support structure 4 and the rotor rotating shaft 5 form the rotor of the integrated permanent magnet liquid metal electromagnetic pump, and when the electromagnetic pump works, the rotor permanent magnet 3 rotates around the rotating shaft under the action of the rotating magnetic field; a semicircular liquid metal runner 6 coaxial with the rotor is arranged outside the rotor, the liquid metal runner 6 is made of stainless steel materials, such as 304 stainless steel, 316L stainless steel and the like, a semicircular outer iron yoke 7 coaxial with the rotor is arranged outside the liquid metal runner 6, and the outer iron yoke 7 is made of ferromagnetic materials, such as pure iron or stacked silicon steel sheets; a magnetic field vertical to the liquid metal flow channel is formed between the outer iron yoke 7 and the rotor permanent magnet 3; when the electromagnetic pump works, a rotating magnetic field generated by the three-phase winding coil 2 drives the electromagnetic pump rotor 5 to rotate, when the electromagnetic pump rotor rotates, the magnetic field perpendicular to the liquid metal flow channel changes alternately, induced eddy current is generated in the liquid metal and the liquid metal flow channel wall, the liquid metal in the liquid metal flow channel 6 forms ampere force under the action of the induced eddy current and the alternating magnetic field, and then the liquid metal is driven to move along the outlet direction in the liquid metal flow channel 6.
As a preferred embodiment of the invention, a thermal insulation layer with large thermal resistance is arranged outside the liquid metal flow channel and the external iron yoke, so that the heat transfer of high-temperature fluid to the electromagnetic pump rotor is reduced, the rotor permanent magnet 3 is processed by adopting samarium cobalt material which can resist the temperature of 350 ℃, so as to ensure that the integrated permanent magnet type liquid metal electromagnetic pump can drive the liquid metal with the temperature of 0-600 ℃, and on the other hand, the rotor rotating at high speed greatly enhances the convection heat exchange between the rotor permanent magnet and air, so as to ensure that the rotor permanent magnet works in a safe temperature range.
The integrated permanent magnet type liquid metal electromagnetic pump is suitable for driving liquid metal to flow, such as sodium, lithium, lead-bismuth alloy, sodium-potassium alloy and the like.
Claims (7)
1. An integrative permanent magnetism formula liquid metal electromagnetic pump which characterized in that: the three-phase motor comprises a stator consisting of a stator iron yoke (1) and a three-phase winding coil (2), a rotor consisting of a rotor permanent magnet (3), a rotor supporting structure (4) and a rotor rotating shaft (5), a liquid metal runner (6) and an external iron yoke (7); the stator iron yoke (1) is formed by stacking silicon steel sheets, and a certain number of teeth are processed on the stator iron yoke (1); the three-phase winding coil (2) is wound on teeth of the stator iron yoke (1), and the wiring sequence of the three-phase winding coil (2) is AZBXCY so as to form a rotating magnetic field; the rotor permanent magnets (3) are arc-shaped, are fixed on the inner periphery of the rotor supporting structure (4) and are positioned on the outer periphery of the stator iron yoke (1), the magnetic field direction of the rotor permanent magnets (3) is along the radial direction, and the N poles and the S poles of the plurality of rotor permanent magnets alternately face the center of the rotor rotating shaft (5); the rotor rotating shaft (5) is connected with the rotor supporting structure (4); the liquid metal runner (6) is arranged outside the rotor, and the outer iron yoke (7) is arranged outside the liquid metal runner (6); when three-phase alternating current is conducted in the three-phase winding coil (2), a rotating magnetic field is formed between the stator iron yoke (1) and the rotor permanent magnet (3), the rotor permanent magnet (3) fixed on the rotor is subjected to magnetic field force in the rotating magnetic field, so that the rotor rotates along with the rotating magnetic field, a radial magnetic field formed between the rotating rotor permanent magnet (3) and the external iron yoke (7) in the liquid metal flow channel (6) rotates, induced eddy current is generated in the liquid metal flow channel (6), the liquid metal generates ampere force under the combined action of the induced eddy current and the magnetic field formed between the rotor permanent magnet (3) and the external iron yoke (7), and the liquid metal is driven to move in the liquid metal flow channel (6) along the outlet direction.
2. The integrated permanent magnet liquid metal electromagnetic pump of claim 1, wherein: the number of teeth of the stator iron yoke (1) is an integral multiple of 6, every 6 teeth form a pole, and the number of the rotor permanent magnets (3) is one third of the number of teeth.
3. The integrated permanent magnet liquid metal electromagnetic pump of claim 1, wherein: the frequency of alternating current in the three-phase winding coil (2) is 5-200Hz, the frequency is controlled by a frequency converter, and the output pressure of the electromagnetic pump is different under different frequencies, so that the output pressure of the electromagnetic pump is controlled by controlling the output frequency of the frequency converter.
4. The integrated permanent magnet liquid metal electromagnetic pump of claim 1, wherein: the rotor permanent magnet (3) is processed by a samarium cobalt material, the highest working temperature of the samarium cobalt material is 350 ℃, when the rotor rotates at a high speed, the heat convection coefficient of the rotor permanent magnet and air is greatly increased, the rotor permanent magnet (3) is ensured to work in a safe temperature range, a heat insulation layer with large heat resistance is arranged outside the liquid metal runner (6) and the external iron yoke (7), and the heat transfer of high-temperature fluid to the rotor of the electromagnetic pump is reduced, so that the electromagnetic pump can drive the liquid metal at 0-600 ℃.
5. The integrated permanent magnet liquid metal electromagnetic pump of claim 1, wherein: the external iron yoke (7) is made of ferromagnetic materials so as to improve the magnetic induction intensity in the liquid metal flow channel (6), further increase the eddy current and ampere force and improve the efficiency of the electromagnetic pump.
6. The integrated permanent magnet liquid metal electromagnetic pump of claim 5, wherein: the ferromagnetic material is pure iron or a silicon steel sheet.
7. The integrated permanent magnet liquid metal electromagnetic pump of claim 1, wherein: the electromagnetic pump can realize self-heating of the liquid metal runner (6), when the electromagnetic pump works, the rotor rotates, eddy current is formed in the wall of the liquid metal runner (6) to generate heat, and self-heating is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995831.2A CN112260513A (en) | 2020-09-21 | 2020-09-21 | Integrated permanent-magnet liquid metal electromagnetic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995831.2A CN112260513A (en) | 2020-09-21 | 2020-09-21 | Integrated permanent-magnet liquid metal electromagnetic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112260513A true CN112260513A (en) | 2021-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010995831.2A Pending CN112260513A (en) | 2020-09-21 | 2020-09-21 | Integrated permanent-magnet liquid metal electromagnetic pump |
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| CN (1) | CN112260513A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673563A (en) * | 2022-03-29 | 2022-06-28 | 北京航空航天大学 | Aeroengine turbine subassembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040084985A1 (en) * | 2002-08-08 | 2004-05-06 | Takao Hasumi | Brushless motor |
| CN101594041A (en) * | 2009-06-24 | 2009-12-02 | 时曦 | Magnetomotive electromagnetic pump |
| CN202856588U (en) * | 2012-10-29 | 2013-04-03 | 上海大学 | Electromagnetic pump |
| CN107020433A (en) * | 2015-10-21 | 2017-08-08 | 埃莎股份有限公司 | Weld pump |
| CN111092533A (en) * | 2018-10-23 | 2020-05-01 | 中车株洲电力机车研究所有限公司 | High-speed maglev train propelling device and high-speed maglev train |
-
2020
- 2020-09-21 CN CN202010995831.2A patent/CN112260513A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040084985A1 (en) * | 2002-08-08 | 2004-05-06 | Takao Hasumi | Brushless motor |
| CN101594041A (en) * | 2009-06-24 | 2009-12-02 | 时曦 | Magnetomotive electromagnetic pump |
| CN202856588U (en) * | 2012-10-29 | 2013-04-03 | 上海大学 | Electromagnetic pump |
| CN107020433A (en) * | 2015-10-21 | 2017-08-08 | 埃莎股份有限公司 | Weld pump |
| CN111092533A (en) * | 2018-10-23 | 2020-05-01 | 中车株洲电力机车研究所有限公司 | High-speed maglev train propelling device and high-speed maglev train |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673563A (en) * | 2022-03-29 | 2022-06-28 | 北京航空航天大学 | Aeroengine turbine subassembly |
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Application publication date: 20210122 |
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| WD01 | Invention patent application deemed withdrawn after publication |