A long-life electromagnetic pump core

Abstract

A long-life electromagnetic pump core includes a first iron core and a second iron core, with an annular pump groove between the first and second iron cores for conveying a liquid conductive medium. At least two sets of coils are provided on the first iron core, and at least two sets of coils are also provided on the second iron core. The first set of coils includes multiple first coils distributed along the axial direction of the pump groove. In this application, the iron core structure includes first and second coils, which operate alternately at different cycles. This ensures that while one set of coils is working, the other set is in a heat dissipation state. Combined with the liquid conductive medium flowing in the pump groove directly absorbing the heat generated by the coils, efficient heat exchange is achieved. This design not only reduces the peak temperature of the coils but also avoids the cumulative temperature rise problem caused by continuous energization in traditional solutions, significantly extending the lifespan of the coils and the pump core.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic pump technology, and more specifically to a long-life electromagnetic pump core. Background Technology

[0002] Electromagnetic pumps are widely used in high-temperature industrial fluid transport, nuclear reactor cooling, miniaturized fluid devices, and spacecraft propulsion systems. Traditional electromagnetic pumps typically employ a single iron core structure, using a fixed coil array to generate a continuous magnetic field that drives the flow of a liquid conductive medium. The aforementioned electromagnetic pump iron core structure has the following drawbacks: First, long-term energized operation of the coils can lead to excessively high local temperatures, accelerating coil insulation aging and reducing equipment reliability and lifespan. Second, traditional heat dissipation solutions often rely on external cooling systems (such as air-cooled or liquid-cooled modules) or passive heat diffusion designs, which can achieve a certain level of heat dissipation, but under high-temperature and high-power conditions, it is difficult to simultaneously achieve both heat dissipation efficiency and energy efficiency. Summary of the Invention

[0003] To address the technical problems existing in electromagnetic pumps in the prior art, this utility model proposes a long-life electromagnetic pump core, including a first iron core and a second iron core, with an annular pump groove provided between the first iron core and the second iron core, the pump groove being used to transport liquid conductive medium;

[0004] The first iron core is provided with at least two sets of coils, and the second iron core is also provided with at least two sets of coils, wherein the first set of coils includes a plurality of first coils distributed along the pump groove axis, and the second set of coils includes a plurality of second coils distributed along the pump groove axis.

[0005] An electromagnetic drive device is connected to the first coil and the second coil and is used to drive the first coil or the second coil to generate a magnetic field, so that the liquid conductive medium located at the inlet of the pump channel moves to the outlet of the pump channel. The heat generated by the first coil or the second coil can exchange heat with the liquid conductive medium flowing in the pump channel.

[0006] The first coil and the second coil operate alternately according to different cycles.

[0007] Preferably, the first coil and the second coil are arranged alternately along the axial direction of the pump trench.

[0008] Preferably, the position of the first coil on the first iron core corresponds to the position of the first coil on the second iron core.

[0009] Preferably, the position of the first coil on the first iron core corresponds to the position of the second coil on the second iron core.

[0010] Preferably, along the axial direction of the pump groove, the distance between the first coil and the second coil on the first iron core is L1, and the distance between the first coil and the second coil on the second iron core is L2, wherein L1=L2.

[0011] Preferably, the first iron core includes a first axial iron core and a first radial iron core, wherein a plurality of first radial iron cores are connected at equal intervals to the inner wall of the first axial iron core, forming a first accommodating space between the plurality of first radial iron cores for accommodating a first coil or a second coil.

[0012] Preferably, the second core includes a second axial core and a second radial core, wherein a plurality of second radial cores are connected at equal intervals to the outer wall of the second axial core, forming a second accommodating space between the plurality of second radial cores for accommodating the first coil or the second coil.

[0013] Preferably, within the first accommodating space, the first coil or the second coil is pressed against one side of the first radial core in the same direction, forming a gap on the other side; within the second accommodating space, the first coil or the second coil is pressed against one side of the second radial core in the same direction, forming a gap on the other side.

[0014] Preferably, it further includes a cooling structure, which includes a first cooling structure and a second cooling structure, wherein the first cooling structure is connected to the inner side of the first iron core and the second cooling structure is connected to the outer side of the second iron core.

[0015] Preferably, both the first cooling structure and the second cooling structure include a first cooling channel and a second cooling channel, the first cooling channel corresponding to the distribution position of the first coil and the second cooling channel corresponding to the distribution position of the second coil, and coolant is introduced into the first cooling channel and the second cooling channel.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] In this application, the core structure includes a first coil and a second coil. The first coil and the second coil operate alternately at different cycles, so that when one set of coils is working, the other set is in a heat dissipation state. Combined with the liquid conductive medium flowing in the pump groove directly absorbing the heat generated by the coils, efficient heat exchange is achieved. This design not only reduces the peak temperature of the coils but also avoids the cumulative temperature rise problem caused by continuous energization in traditional solutions, significantly extending the life of the coils and the pump core.

[0018] In addition, when the first and second coils are arranged alternately along the pump groove axis, the coil positions on the first and second iron cores correspond to each other, forming a continuous axial magnetic field distribution, which ensures that the liquid conductive medium flows stably under the drive of electromagnetic force and reduces flow fluctuations. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the electromagnetic pump core structure shown in this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the first iron core and the second iron core shown in this utility model.

[0021] Figure 3 This is a schematic diagram of the first coil in the working state shown in this utility model. Detailed Implementation

[0022] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0023] Combination Figure 1 and Figure 2 As shown, a long-life electromagnetic pump core includes a first iron core 10 and a second iron core 30, with an annular pump groove 20 provided between the first iron core 10 and the second iron core 30. The pump groove 20 is used to transport liquid conductive medium.

[0024] The liquid conductive medium includes liquid metal.

[0025] Furthermore, the first iron core 10 is provided with at least two sets of coils, and the second iron core 30 is also provided with at least two sets of coils, wherein the first set of coils includes a plurality of first coils 11 distributed along the axial direction of the pump groove 20, and the second set of coils includes a plurality of second coils 12 distributed along the axial direction of the pump groove 20.

[0026] In this way, by arranging two sets of coils, the two sets of coils can be used alternately to drive the liquid metal to move within the pump groove 20. When one set of coils is in the driving state, the other set of coils is in the idle state to avoid the continuous energization of the coils, which would cause the temperature to rise too high. By using this arrangement of two or more sets of coils, while ensuring continuous driving of the liquid metal, the temperature rise of the coils can also be suppressed from reaching the target upper limit.

[0027] Furthermore, the electromagnetic drive device is connected to the first coil 11 and the second coil 12, and is used to drive the first coil 11 or the second coil 12 to generate a magnetic field.

[0028] In this way, the liquid conductive medium located at the inlet 21 of the pump channel 20 is moved to the outlet 22 of the pump channel 20, and the heat generated by the first coil 11 or the second coil 12 can exchange heat with the liquid conductive medium flowing in the pump channel 20.

[0029] Understandably, when a liquid conductive medium, such as liquid metal, continuously flows from the pump channel 20, it can continuously carry away the heat generated by the first coil 11 or the second coil 12, thereby achieving heat dissipation for the coil.

[0030] The first coil 11 and the second coil 12 operate alternately according to different cycles.

[0031] As described above, when the operating cycles of the first coil 11 and the second coil 12 alternate, one of the first coil 11 and the second coil 12 is in a conductive heating state, while the other is in a power-off cooling state. By alternately controlling the operating states of the first coil 11 and the second coil 12, the temperature rise of the first coil 11 or the second coil 12 can be controlled.

[0032] The operating cycle of the first coil 11 and the second coil 12 can be determined by the coil's temperature rise rate and heat dissipation capacity.

[0033] In an optional embodiment, the first coil 11 and the second coil 12 are arranged alternately along the axial direction of the pump groove 20. That is, the first coil 11 and the second coil 12 form a continuous magnetic field in the axial direction of the pump groove 20 to drive the liquid conductive medium in the pump groove 20 to flow continuously under the drive of electromagnetic force.

[0034] In an optional embodiment, the position of the first coil 11 on the first iron core 10 corresponds to the position of the first coil 11 on the second iron core 30.

[0035] Preferably, in order to further improve the continuity of the magnetic field, such as Figure 1 As shown, the position of the first coil 11 on the first iron core 10 corresponds to the position of the second coil 12 on the second iron core 30. In the figure, the first coil 11 is represented by 'a', and the second coil is represented by 'b'.

[0036] Thus, regardless of whether the first coil 11 or the second coil 12 is energized, the magnetic field formed will have stronger continuity along the axial direction of the pump groove 20, so as to ensure the stable and reliable transport of liquid conductive medium in the pump groove 20.

[0037] In the above embodiment, along the axial direction of the pump groove 20, the distance between the first coil 11 and the second coil 12 on the first iron core 10 is L1, and the distance between the first coil 11 and the second coil 12 on the second iron core 30 is L2, where L1=L2.

[0038] Combination Figure 2As shown, the first iron core 10 includes a first axial iron core and a first radial iron core, wherein a plurality of first radial iron cores are connected at equal intervals to the inner wall of the first axial iron core, forming a first receiving space between the plurality of first radial iron cores for accommodating the first coil 11 or the second coil 12.

[0039] Furthermore, the second core 30 includes a second axial core 301 and a second radial core 302, wherein a plurality of second radial cores 302 are connected at equal intervals to the outer wall of the second axial core 301, and a second receiving space 303 for receiving the first coil 11 or the second coil 12 is formed between the plurality of second radial cores 302.

[0040] In a preferred embodiment, within the first accommodating space, the first coil 11 or the second coil 12 is pressed against one side of the first radial core in the same direction, forming a gap on the other side; within the second accommodating space 303, the first coil 11 or the second coil 12 is pressed against one side of the second radial core 302 in the same direction, forming a gap on the other side.

[0041] Thus, there is a gap between the first coil 11 and the second coil 12, which can be used as a heat insulation cavity to reduce the heat conduction between the first coil 11 and the second coil 12 and avoid mutual temperature interference between the first coil 11 and the second coil 12. This can reduce the temperature rise rate of the coil during the operating cycle and increase the cooling rate of the coil during the idle cycle.

[0042] In the above embodiments, combined with Figure 1 and Figure 3 As shown, the electromagnetic pump core structure described above also includes a cooling structure 40.

[0043] The cooling structure 40 includes a first cooling structure 41 and a second cooling structure 42. The first cooling structure 41 is connected to the inner side of the first iron core 10, and the second cooling structure 42 is connected to the outer side of the second iron core 30.

[0044] Thus, the first cooling structure 41 and the second cooling structure 42 can actively dissipate heat from the first iron core 10 and the second iron core 30, improving the heat dissipation efficiency of the iron core structure, which is especially suitable for scenarios with high heat dissipation requirements.

[0045] Combination Figure 3 As shown, both the first cooling structure 41 and the second cooling structure 42 include a first cooling channel and a second cooling channel. The first cooling channel corresponds to the distribution position of the first coil 11, and the second cooling channel corresponds to the distribution position of the second coil 12. Coolant is introduced into the first cooling channel and the second cooling channel.

[0046] Each cooling channel includes a coolant inlet 401 and a coolant outlet 402, which are respectively connected to the coolant circulation system to provide coolant at the target temperature into the cooling channel.

[0047] Understandably, the first cooling channel and the second cooling channel are independent of each other and correspond to the distribution of the first coil and the second coil, respectively.

[0048] The first coil 11 and the second coil 12 are always in different operating cycles. For example, when the first coil 11 is in an operating cycle, the second coil 12 is in an idle cycle. Coolant at a first temperature can be injected into the first cooling channel to dissipate heat from the first coil 11, and coolant at a second temperature can be injected into the second cooling channel to dissipate heat from the second coil 12.

[0049] Optionally, the first cooling channel and the second cooling channel can be configured to be connected in series and / or in parallel. That is, the coolant can flow sequentially from the first cooling channel to the second cooling channel, or enter from the second cooling channel and then flow into the first cooling channel, or flow to both the first and second cooling channels simultaneously.

[0050] It should be understood that when the second coil 12 switches from the operating cycle to the idle cycle, its coil temperature is at the upper limit of the temperature range, and efficient heat dissipation should be carried out. Therefore, the coolant with the lowest temperature should be used for cooling first. When the first coil 11 switches from the idle cycle to the operating cycle, the coil temperature is lower. In order to improve the utilization rate of the coolant, it can be introduced into the second cooling channel and the first cooling channel in sequence. When the first coil 11 continues to operate, the temperatures of the first coil 11 and the second coil 12 are relatively close. The coolant of the same temperature can be supplied to the first cooling channel and the second cooling channel in parallel. Furthermore, when the first coil 11 continues to operate until it approaches the upper limit of the target temperature, heat dissipation of the first coil 11 should be prioritized, and the coolant can be introduced into the first cooling channel and the second cooling channel in sequence.

[0051] As mentioned above, by integrating the independent first and second cooling structures on the inner and outer sides of the iron core respectively, the cooling channels precisely correspond to the coil distribution. By flexibly adjusting the coolant flow direction and temperature, dynamic thermal management is achieved. While reducing energy consumption, it can adapt to the heat dissipation requirements under different operating conditions, and is especially suitable for high-power or long-term operation scenarios.

Claims

1. A long-life electromagnetic pump core, characterized in that, It includes a first iron core (10) and a second iron core (30), and an annular pump groove (20) is provided between the first iron core (10) and the second iron core (30). The pump groove (20) is used to transport liquid conductive medium. The first iron core (10) is provided with at least two sets of coils, and the second iron core (30) is also provided with at least two sets of coils, wherein the first set of coils includes a plurality of first coils (11) distributed along the axial direction of the pump groove (20), and the second set of coils includes a plurality of second coils (12) distributed along the axial direction of the pump groove (20). An electromagnetic drive device is connected to the first coil (11) and the second coil (12) and is used to drive the first coil (11) or the second coil (12) to generate a magnetic field, so that the liquid conductive medium located at the inlet (21) of the pump groove (20) moves to the outlet (22) of the pump groove (20). The heat generated by the first coil (11) or the second coil (12) can exchange heat with the liquid conductive medium flowing in the pump groove (20). The first coil (11) and the second coil (12) operate alternately according to different cycles.

2. The long-life electromagnetic pump core according to claim 1, characterized in that, The first coil (11) and the second coil (12) are arranged alternately along the axial direction of the pump groove (20).

3. The long-life electromagnetic pump core according to claim 2, characterized in that, The position of the first coil (11) on the first iron core (10) corresponds to the position of the first coil (11) on the second iron core (30).

4. The long-life electromagnetic pump core according to claim 2, characterized in that, The position of the first coil (11) on the first iron core (10) corresponds to the position of the second coil (12) on the second iron core (30).

5. A long-life electromagnetic pump core according to claim 3 or 4, characterized in that, Along the axial direction of the pump groove (20), on the first iron core (10), the distance between the first coil (11) and the second coil (12) is L1, and on the second iron core (30), the distance between the first coil (11) and the second coil (12) is L2, where L1=L2.

6. The long-life electromagnetic pump core according to claim 1, characterized in that, The first iron core (10) includes a first axial iron core and a first radial iron core, wherein a plurality of first radial iron cores are connected at equal intervals to the inner wall of the first axial iron core, forming a first accommodating space between the plurality of first radial iron cores for accommodating a first coil (11) or a second coil (12).

7. A long-life electromagnetic pump core according to claim 6, characterized in that, The second core (30) includes a second axial core (301) and a second radial core (302), wherein a plurality of second radial cores (302) are connected at equal intervals to the outer wall of the second axial core (301), and a second receiving space (303) for receiving a first coil (11) or a second coil (12) is formed between the plurality of second radial cores (302).

8. A long-life electromagnetic pump core according to claim 7, characterized in that, Within the first accommodating space, the first coil (11) or the second coil (12) is attached to one side of the first radial core in the same direction, forming a gap on the other side; within the second accommodating space (303), the first coil (11) or the second coil (12) is attached to one side of the second radial core (302) in the same direction, forming a gap on the other side.

9. A long-life electromagnetic pump core according to claim 1, characterized in that, It also includes a cooling structure (40), which includes a first cooling structure (41) and a second cooling structure (42). The first cooling structure (41) is connected to the inner side of the first iron core (10), and the second cooling structure (42) is connected to the outer side of the second iron core (30).

10. A long-life electromagnetic pump core according to claim 9, characterized in that, Both the first cooling structure (41) and the second cooling structure (42) include a first cooling channel and a second cooling channel. The first cooling channel corresponds to the distribution position of the first coil (11), and the second cooling channel corresponds to the distribution position of the second coil (12). Coolant is introduced into the first cooling channel and the second cooling channel.

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