Induction electromagnetic pump

Abstract

This application discloses an induction electromagnetic pump, comprising an inner iron core, a pump groove structure, multiple support structures, multiple annular windings, and multiple outer iron cores. The pump groove structure is a hollow annular structure including an inner tube wall and an outer tube wall. The end of the pump groove structure that receives liquid metal is defined as the input end, and the end that outputs liquid metal is defined as the output end. Multiple support structures are connected between the inner and outer tube walls, located at the input and output ends respectively, and can reduce the thrust opposite to the flow direction of the liquid metal caused by end effects. Through the above configuration, the support structures can improve the connection stability between the outer and inner tube walls, which is beneficial for the induction electromagnetic pump to pump liquid metal, and can also increase the total thrust of the induction electromagnetic pump in pumping liquid metal along the flow direction.

Description

Technical Field

[0001] This application relates to the field of electromagnetic pumps, and in particular to an induction electromagnetic pump. Background Technology

[0002] An induction electromagnetic pump is a non-mechanical contact pump that uses the principle of electromagnetic induction to drive the flow of liquid metal. Its principle is to induce eddy currents in liquid metal through an alternating magnetic field. The interaction between the eddy currents and the magnetic field generates Ampere force, thereby driving the flow of liquid metal.

[0003] An induction electromagnetic pump includes a pipe for the flow of liquid metal, comprising an inner pipe wall and an outer pipe wall, between which the liquid metal flows. In existing induction electromagnetic pumps, the inner and outer pipe walls cannot be stably connected, resulting in insufficient strength of both walls. Furthermore, when pumping liquid metal, the input and output ends of the pipe are located at the edges of the induced magnetic field generated by the pump, leading to uneven or even reversed magnetic fields at the input and output ends (i.e., end effect of the electromagnetic pump). This results in Ampere forces at the input and output ends that are opposite to the flow direction of the liquid metal, reducing the total thrust of the induction electromagnetic pump on the liquid metal along the flow direction. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide an induction electromagnetic pump that can improve the connection stability between the inner and outer pipe walls and increase the total thrust of the induction electromagnetic pump on liquid metal along the flow direction.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] An induction electromagnetic pump includes an inner iron core, a pump groove structure, multiple support structures, multiple annular windings, and multiple outer iron cores. The inner iron core is axial; the pump groove structure is a hollow annular structure including an inner tube wall and an outer tube wall, the inner tube wall is sleeved on the inner iron core and fixedly connected to the inner iron core, the end of the pump groove structure that receives liquid metal is defined as the input end, and the end of the pump groove structure that outputs liquid metal is defined as the output end; multiple support structures are connected between the inner tube wall and the outer tube wall, and the multiple support structures are located at the input end and the output end, respectively. The support structures can support the inner tube wall and the outer tube wall and can reduce the thrust opposite to the flow direction of liquid metal caused by the end effect; multiple annular windings are sleeved on the outer tube wall and are evenly spaced along the axial direction of the pump groove structure; multiple outer iron cores are uniformly arranged around the outer tube wall, each outer iron core includes a transverse part and multiple vertical parts, the multiple vertical parts are connected to the side of the transverse part near the pump groove structure, and each annular winding is located between two corresponding adjacent vertical parts.

[0007] Furthermore, along the radial direction of the pump groove structure, the portion of the support structure overlapping the outer iron core and the annular winding is defined as the internal support portion. The maximum length of the internal support portion along the axial direction of the pump groove structure is greater than one-tenth of the pole pitch and less than one-half of the pole pitch of the induction electromagnetic pump.

[0008] Furthermore, the support structure includes multiple first support structures and multiple second support structures, all of which are connected between the inner pipe wall and the outer pipe wall. The multiple first support structures are evenly arranged along the circumference of the inner pipe wall at the input end, and the multiple second support structures are evenly arranged along the circumference of the inner pipe wall at the output end. The maximum length of the first support structure along the axial direction of the pump groove structure is less than the maximum length of the second support structure along the axial direction of the pump groove structure.

[0009] Furthermore, along the radial direction of the pump groove structure, the portion of the support structure that does not overlap with the outer iron core and the annular winding is defined as the external support portion. The maximum length of the external support portion along the axial direction of the pump groove structure is greater than one-twentieth of the pole pitch and less than one-half of the pole pitch of the induction electromagnetic pump.

[0010] Furthermore, the induction electromagnetic pump also includes two end caps, two outer pipes, and a guide structure. Multiple outer iron cores are located between the two end caps, which are connected to both sides of each outer iron core along the axial direction of the pump groove structure. Each outer pipe is connected to one end cap; one outer pipe connects to the input end, and the other connects to the output end. The guide structure has an oval head structure and is located inside the outer pipes, with the end of the guide structure having the largest diameter connected to the inner pipe wall. The maximum diameter of the guide structure is equal to the outer diameter of the inner pipe wall.

[0011] Furthermore, the inner iron core has a hollow cylindrical structure.

[0012] Furthermore, the induction electromagnetic pump also includes pole shoes, which are ring-shaped and fitted onto the outer tube wall. The pole shoes are located between the outer tube wall and the vertical part. The pole shoes are made of silicon steel sheets, or the pole shoes are made of multiple silicon steel sheets stacked radially along the pump groove structure.

[0013] Furthermore, each pair of adjacent vertical sections corresponds to a pole shoe, so that a closed groove is formed between the pole shoe and the two adjacent vertical sections.

[0014] Furthermore, two adjacent vertical sections correspond to two pole shoes, and there is a gap between the two pole shoes, so that a semi-open groove is formed between the two pole shoes and the two adjacent vertical sections.

[0015] Furthermore, the pole shoe includes multiple arc-shaped pole shoes, which are distributed circumferentially along the outer tube wall to form a pole shoe with a ring structure.

[0016] The aforementioned induction electromagnetic pump has support structures at both the input and output ends. These support structures improve the connection stability between the inner and outer pipe walls, which is beneficial for the induction electromagnetic pump to pump liquid metal. Furthermore, the conductivity of the support structure is lower than that of the liquid metal, thereby reducing the overall conductivity at both the input and output ends. This, in turn, reduces the Ampere force generated at the input and output ends that is opposite to the flow direction of the liquid metal, which is beneficial for increasing the total thrust of the induction electromagnetic pump in pumping liquid metal along the flow direction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an induction electromagnetic pump provided in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram showing the combination of the annular winding, outer iron core, inner iron core, and pump groove structure of the induction electromagnetic pump provided in the embodiments of this application.

[0019] Figure 3 This is a cross-sectional schematic diagram of an induction electromagnetic pump provided in an embodiment of this application.

[0020] Figure 4 This is a schematic diagram showing the relationship between the thrust and flow velocity of an induction electromagnetic pump pumping liquid metal along the flow direction when the inner and outer pipe walls are made of non-insulating materials, as provided in an embodiment of this application.

[0021] Figure 5 This is a schematic diagram showing the relationship between the thrust and flow velocity of an induction electromagnetic pump pumping liquid metal along the flow direction when the inner and outer pipe walls are made of insulating materials, as provided in an embodiment of this application.

[0022] Figure 6 Provided for the embodiments of this application Figure 3 Enlarged diagram of point A in the middle.

[0023] Figure 7 This is a force analysis diagram of liquid metal in an induction electromagnetic pump without a supporting structure.

[0024] Figure 8 Force analysis diagram of liquid metal in an induction electromagnetic pump provided in an embodiment of this application.

[0025] Figure 9 This is a schematic diagram of the combination of the pump groove structure and the pole shoe of the induction electromagnetic pump provided in an embodiment of this application.

[0026] Figure 10 This is a schematic diagram of the pole shoe structure of an induction electromagnetic pump provided in an embodiment of this application.

[0027] Figure 11 This is a schematic diagram of the closed-slot structure of the induction electromagnetic pump provided in an embodiment of this application. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0029] It should be noted that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates at least two. Unless otherwise stated, terms such as "front," "back," "left," "right," "lower," and / or "upper" are for illustrative purposes only and are not limited to a location or spatial orientation. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0030] The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0031] like Figure 1 and Figure 2As shown, this application provides an induction electromagnetic pump 100, which includes an inner iron core 11, a pump groove structure 12, an annular winding 13, and an outer iron core 14. Specifically, the pump groove structure 12 is used to transport liquid metal. The pump groove structure 12 has a hollow annular structure and includes an inner pipe wall 121 and an outer pipe wall 122. A flow space is formed between the inner pipe wall 121 and the outer pipe wall 122, and the liquid metal can flow in the flow space. Multiple annular windings 13 and multiple outer iron cores 14 are provided, and multiple annular windings 13 are all sleeved on the outer pipe wall 122. Multiple outer iron cores 14 are evenly arranged around the outer pipe wall 122. The annular windings 13 can be connected to a power source and generate an induced magnetic field. The liquid metal generates an Ampere force in the induced magnetic field, and the Ampere force drives the liquid metal to move along the flow direction, thereby realizing the pumping of liquid metal by the induction electromagnetic pump 100. The inner iron core 11 is axial, and the inner tube wall 121 is sleeved on and fixedly connected to the inner iron core 11. The inner iron core 11 and the outer iron core 14 can concentrate the induced magnetic field, thereby increasing the Ampere force pushing the liquid metal, and thus increasing the overall thrust of the induction electromagnetic pump 100 in pumping the liquid metal along the flow direction. It should be noted that the induction electromagnetic pump 100 of this application can also pump other conductive fluids, and this application does not limit this.

[0032] like Figure 3 As shown, in this application, the end of the pump channel structure 12 that receives liquid metal is defined as the input end 123, and the end of the pump channel structure 12 that outputs liquid metal is defined as the output end 124. The flow direction of the liquid metal is from the input end 123 to the output end 124.

[0033] In some embodiments, the inner iron core 11 is embedded in the inner tube wall 121 so that the inner iron core 11 and the inner tube wall 121 are interference-fitted, thereby making the inner iron core 11 and the inner tube wall 121 fixedly connected.

[0034] Specifically, multiple annular windings 13 are arranged at equal intervals along the axial direction of the pump groove structure 12. This arrangement can improve the uniformity of the induced magnetic field generated by the multiple annular windings 13, thereby improving the uniformity of the Ampere force generated in the liquid metal, which in turn helps to improve the flow stability of the liquid metal in the flow space, and consequently improves the stability of the induction electromagnetic pump 100 in pumping liquid metal.

[0035] More specifically, refer to Figure 2Each outer iron core 14 includes a horizontal portion 141 and multiple vertical portions 142. The multiple vertical portions 142 are connected to the side of the horizontal portion 141 near the pump groove structure 12, and each annular winding 13 is located between two adjacent vertical portions 142. This arrangement provides space for the annular windings 13 through the vertical portions 142, which is beneficial for the spaced arrangement of the annular windings 13. Furthermore, the outer iron core 14 can increase the intensity of the induced magnetic field generated by the annular windings 13, thereby further increasing the Ampere force pushing the liquid metal, and thus increasing the thrust of the induction electromagnetic pump 100 in pumping the liquid metal along the flow direction.

[0036] like Figure 2 and Figure 3 As shown, in this embodiment, the induction electromagnetic pump 100 further includes a support structure 15. Multiple support structures 15 are provided, and each support structure 15 can support the inner pipe wall 121 and the outer pipe wall 122. This arrangement improves the connection stability between the inner pipe wall 121 and the outer pipe wall 122 through the support structure 15, thereby increasing the structural strength of the pump groove structure 12, which is beneficial for the induction electromagnetic pump 100 to pump liquid metal.

[0037] Specifically, multiple support structures 15 are connected between the inner tube wall 121 and the outer tube wall 122. It should be noted that in existing induction electromagnetic pumps, to facilitate the connection between the inner and outer tube walls, it is usually necessary to extend the inner and outer tubes and install sleeves or other fixing structures on the extended sections of the outer and inner tubes to connect them. However, the extended outer and inner tubes exacerbate the end effect of the induction electromagnetic pump. Therefore, this application connects the support structures 15 between the inner tube wall 121 and the outer tube wall 122, thus eliminating the need to extend the inner and outer tube walls 121 and 122 to connect them. This avoids the exacerbation of the end effect of the induction electromagnetic pump 100 caused by extending the inner and outer tube walls 121 and 122, thereby improving the total thrust of the induction electromagnetic pump 100 in pumping liquid metal along the flow direction.

[0038] More specifically, multiple support structures 15 are located at the input end 123 and the output end 124, respectively, and can reduce the thrust opposite to the flow direction of the liquid metal caused by the end effect. It should be noted that the conductivity of the support structure 15 is lower than that of the liquid metal, thereby reducing the overall conductivity of the input end 123 and the output end 124. This helps to reduce the Ampere force formed at the input end 123 and the output end 124 opposite to the flow direction of the liquid metal, which in turn helps to increase the total thrust of the induction electromagnetic pump 100 in pumping the liquid metal along the flow direction, and thus helps to improve the performance of the induction electromagnetic pump 100.

[0039] In summary, the support structure 15 can improve the connection stability between the inner tube wall 121 and the outer tube wall 122 while avoiding the extension of the inner tube wall 121 and the outer tube wall 122. This helps to reduce the end effect of the induction electromagnetic pump 100. Furthermore, the support structure 15 can reduce the Ampere force formed at the input end 123 and the output end 124 that is opposite to the flow direction of the liquid metal, further reducing the end effect of the induction electromagnetic pump 100. This increases the total thrust of the induction electromagnetic pump 100 in pumping the liquid metal along the flow direction, thereby improving the performance of the induction electromagnetic pump 100.

[0040] In this application, both the inner tube wall 121 and the outer tube wall 122 can be made of insulating materials or non-insulating materials. Non-insulating materials can be stainless steel, aluminum alloy, etc. Non-insulating materials have higher mechanical strength, which helps improve the structural strength of the pump trench structure 12, and consequently improves the stability of the induction electromagnetic pump 100 in conveying liquid metal. Insulating materials can be ceramics, plastics, glass, etc. Due to their non-conductive properties, insulating materials can prevent eddy current losses in the inner tube wall 121 and outer tube wall 122 caused by the induced magnetic field generated by the winding. This allows the induced magnetic field generated by the winding to concentrate on the liquid metal, generating an Ampere force that propels the liquid metal flow, thereby increasing the overall thrust of the induction electromagnetic pump 100 in pumping the liquid metal along the flow direction.

[0041] like Figure 4 As shown, under the condition that the inner pipe wall 121 and the outer pipe wall 122 are made of non-insulating materials, the total thrust of the induction electromagnetic pump 100 with support structure 15 pumping liquid metal in the flow direction and the total thrust of the induction electromagnetic pump without support structure 15 pumping liquid metal in the flow direction are measured. The vertical axis represents the magnitude of the total thrust of the induction electromagnetic pump pumping liquid metal in the flow direction, and the horizontal axis represents the velocity of the liquid metal inside the induction electromagnetic pump. The red line segment represents the relationship between the total thrust and velocity of the induction electromagnetic pump 100 with support structure 15 and the induction electromagnetic pump without support structure 15. According to... Figure 4 It can be seen that when the inner pipe wall 121 and the outer pipe wall 122 are made of non-insulating materials, and the flow velocity of the liquid metal is higher than 3 m / s, the total thrust of the induction electromagnetic pump 100 with the support structure 15 pumping the liquid metal in the flow direction is significantly greater than the total thrust of the induction electromagnetic pump without the support structure 15 pumping the liquid metal in the flow direction.

[0042] like Figure 5As shown, under the condition that the inner pipe wall 121 and the outer pipe wall 122 are made of insulating materials, the total thrust of the induction electromagnetic pump 100 with support structure 15 pumping liquid metal in the flow direction and the total thrust of the induction electromagnetic pump without support structure 15 pumping liquid metal in the flow direction are measured. The vertical axis represents the magnitude of the total thrust of the induction electromagnetic pump pumping liquid metal in the flow direction, and the horizontal axis represents the velocity of the liquid metal inside the induction electromagnetic pump. The red line segment represents the relationship between the total thrust and velocity of the induction electromagnetic pump 100 with support structure 15 and the induction electromagnetic pump without support structure 15. According to... Figure 5 It can be seen that when the inner pipe wall 121 and the outer pipe wall 122 are made of insulating materials, and the flow velocity of the liquid metal is higher than 2.5 m / s, the total thrust of the induction electromagnetic pump 100 with the support structure 15 pumping the liquid metal in the flow direction is significantly greater than the total thrust of the induction electromagnetic pump without the support structure 15 pumping the liquid metal in the flow direction.

[0043] It should be noted that the induction electromagnetic pump 100 is typically used in high-flow-rate applications, meaning that the flow rate of the liquid metal driven by the induction electromagnetic pump 100 is usually greater than 3 m / s. Therefore, according to Figure 4 and Figure 5 It can be seen that when the induction electromagnetic pump 100 is applied to high flow rate conditions, and the inner pipe wall 121 and outer pipe wall 122 are made of non-insulating or insulating materials, the total thrust of the induction electromagnetic pump 100 with the support structure 15 pumping liquid metal in the flow direction is greater than that of the induction electromagnetic pump without the support structure 15. Therefore, when the induction electromagnetic pump 100 with the support structure 15 and the induction electromagnetic pump without the support structure 15 drive the liquid metal to the same flow rate, the energy consumption of the induction electromagnetic pump 100 with the support structure 15 can be less than that of the induction electromagnetic pump without the support structure 15, which helps to reduce the energy consumption of the induction electromagnetic pump 100 driving the liquid metal.

[0044] like Figure 6As shown, in one embodiment, the portion of the support structure 15 overlapping the outer iron core 14 and the annular winding 13 along the radial direction of the pump groove structure 12 is defined as the internal support portion 151. The maximum length L1 of the internal support portion 151 along the axial direction of the pump groove structure 12 is greater than one-tenth of the pole pitch of the induction electromagnetic pump 100 and less than one-half of the pole pitch of the induction electromagnetic pump 100. Specifically, the maximum length L1 of the internal support portion 151 along the axial direction of the pump groove structure 12 is greater than one-eighth of the pole pitch of the induction electromagnetic pump 100 and less than one-half of the pole pitch of the induction electromagnetic pump 100. More specifically, the maximum length L1 of the internal support portion 151 along the axial direction of the pump groove structure 12 is greater than one-fifth of the pole pitch of the induction electromagnetic pump 100 and less than one-half of the pole pitch of the induction electromagnetic pump 100. Here, the pole pitch refers to the distance between the center points of two adjacent magnetic poles in the induced magnetic field generated by the annular winding 13 along the direction of liquid metal flow.

[0045] By adopting the above configuration, it is possible to avoid the maximum length L1 of the internal support part 151 along the axial direction of the pump groove structure 12 being too small, which would result in the support structure 15 being too short. This avoids insufficient support strength of the support structure 15 for the inner pipe wall 121 and the outer pipe wall 122, thereby improving the structural strength of the pump groove structure 12 and thus enhancing the stability of the induction electromagnetic pump 100 in pumping liquid metal. Secondly, it is possible to avoid the maximum length L1 of the internal support part 151 along the axial direction of the pump groove structure 12 being too large, which would result in the support structure 15 being too long. This avoids excessive Ampere force generated by the input end 123 and output end 124 of the support structure 15, which is opposite to the flow direction of the liquid metal. This is beneficial to improving the total thrust of the induction electromagnetic pump 100 in pumping liquid metal along the flow direction.

[0046] like Figure 3 As shown, in one embodiment, the support structure 15 includes a plurality of first support structures 152 and a plurality of second support structures 153, all of which are connected between the inner tube wall 121 and the outer tube wall 122. Specifically, the plurality of first support structures 152 are evenly arranged circumferentially along the inner tube wall 121 at the input end 123, and the plurality of second support structures 153 are evenly arranged circumferentially along the inner tube wall 121 at the output end 124. With this arrangement, the plurality of first support structures 152 can reduce the end effect at the input end 123, and the plurality of second support structures 153 can reduce the end effect at the output end 124, thereby improving the total thrust of the induction electromagnetic pump 100 in pumping liquid metal along the flow direction.

[0047] It should be noted that the end effect at the output end 124 of the induction electromagnetic pump 100 is generally greater than the end effect at the input end 123. Therefore, in this embodiment, the maximum length of the first support structure 152 along the axial direction of the pump groove structure 12 is less than the maximum length of the second support structure 153 along the axial direction of the pump groove structure 12. This arrangement allows the second support structure 153 to have a stronger ability to reduce the end effect compared to the first support structure 152, enabling the second support structure 153 to reduce the strong end effect at the output end 124, thereby improving the total thrust of the induction electromagnetic pump 100 in pumping liquid metal along the flow direction.

[0048] like Figure 7 and Figure 8 As shown, the thrust of an induction electromagnetic pump on liquid metal was measured under the same operating conditions, where, Figure 7 This is a thrust analysis diagram of an induction electromagnetic pump without a supporting structure 15 applied to liquid metal. Figure 8 A thrust analysis diagram of an induction electromagnetic pump 100 with a support structure 15 against liquid metal. Figure 7 and Figure 8 The arrows in the diagram indicate the direction of liquid metal flow. According to... Figure 7 It can be seen that in the induction electromagnetic pump without the support structure 15, a large amount of Ampere force acting on the liquid metal at both ends is opposite to the direction of liquid metal flow, with a maximum output of 12×105 N / m3, which is on the same order of magnitude as the Ampere force output of the electromagnetic pump in the central section. According to Figure 8 It can be seen that in the induction electromagnetic pump 100 with the support structure 15, the reverse Lorentz force at both ends is significantly reduced to an order of magnitude different from the Ampere force output of the electromagnetic pump in the central section without the support structure 15. Understandably, compared to the induction electromagnetic pump without the support structure 15, the induction electromagnetic pump 100 with the support structure 15 can significantly reduce the Ampere force generated by the end effect that is opposite to the flow direction of the liquid metal, thereby improving the total thrust of the induction electromagnetic pump 100 in pumping the liquid metal along the flow direction.

[0049] like Figure 6As shown, in one embodiment, the portion of the support structure 15 that does not overlap with the outer iron core 14 and the annular winding 13 along the radial direction of the pump groove structure 12 is defined as the external support portion 154. The maximum length L2 of the external support portion 154 along the axial direction of the pump groove structure 12 is greater than one-twentieth and less than half of the pole pitch of the induction electromagnetic pump 100. Specifically, the maximum length L2 of the external support portion 154 along the axial direction of the pump groove structure 12 is greater than one-tenth and less than half of the pole pitch of the induction electromagnetic pump 100. More specifically, the maximum length L2 of the external support portion 154 along the axial direction of the pump groove structure 12 is greater than one-fifth and less than half of the pole pitch of the induction electromagnetic pump 100.

[0050] By adopting the above configuration, it is possible to avoid the maximum length L2 of the external support part 154 along the axial direction of the pump groove structure 12 being too small, which would result in the support structure 15 being too short. This avoids insufficient support strength of the support structure 15 for the inner pipe wall 121 and the outer pipe wall 122, thereby improving the structural strength of the pump groove structure 12 and thus enhancing the stability of the induction electromagnetic pump 100 in pumping liquid metal. Secondly, it is possible to avoid the maximum length L2 of the external support part 154 along the axial direction of the pump groove structure 12 being too large, which would result in the support structure 15 being too long. This avoids excessive Ampere force generated by the input end 123 and output end 124 of the support structure 15, which is opposite to the flow direction of the liquid metal. This, in turn, helps to increase the total thrust of the induction electromagnetic pump 100 in pumping liquid metal along the flow direction.

[0051] like Figure 1 and Figure 3 As shown, in one embodiment, the induction electromagnetic pump 100 also includes an end cap 16, an outer pipe 17, and a guide structure 18. The end cap 16 is used to fix the outer iron core 14, the outer pipe 17 is used to connect the flow space of the pump groove structure 12 to facilitate the flow of liquid metal in the induction electromagnetic pump 100, and the guide structure 18 is located inside the outer pipe 17 and is used to guide the liquid metal.

[0052] Specifically, two end caps 16 are provided, and multiple outer iron cores 14 are located between the two end caps 16. The two end caps 16 are respectively connected to both sides of each outer iron core 14 along the axial direction of the pump groove structure 12. In some embodiments, the end caps 16 and the outer iron cores 14 are fixedly connected by screws. The end caps 16 can fix the outer iron cores 14, thereby improving the overall structural strength of the induction electromagnetic pump 100.

[0053] In some embodiments, the end cap 16 has at least one through hole 161, which, when viewed axially from the pump groove structure 12, at least partially overlaps with the annular winding 13. This arrangement facilitates heat dissipation from the annular winding 13, thereby improving the heat dissipation efficiency of the induction electromagnetic pump 100.

[0054] More specifically, two external pipes 17 are provided, each connected to an end cap 16. One external pipe 17 connects to the input end 123, and the other external pipe 17 connects to the output end 124. This arrangement allows the flow space of the pump trench structure 12 to be connected via the two external pipes 17, facilitating the connection of the induction electromagnetic pump 100 to the external pipes and thus enabling the induction electromagnetic pump 100 to pump liquid metal. In some embodiments, the end cap 16 and the external pipe 17 are an integral structure, which improves the structural strength of the end cap 16 and the external pipe 17, and consequently, the overall structural strength of the induction electromagnetic pump 100.

[0055] In this embodiment, the guide structure 18 has an oval head structure, that is, the guide structure 18 has a torpedo head structure. Specifically, the end of the guide structure 18 with the largest diameter is connected to the inner pipe wall 121. With this configuration, when the liquid metal flows through the outer pipe 17, the guide structure 18 can reduce the flow resistance, thereby facilitating the flow of the liquid metal in the induction electromagnetic pump 100, and further facilitating the induction electromagnetic pump 100 to pump the liquid fluid.

[0056] More specifically, refer to Figure 4 The maximum diameter of the guide structure 18 is equal to the outer diameter of the inner tube wall 121. This arrangement avoids direct contact between the liquid metal and the inner tube wall 121, which would cause excessive flow resistance to the liquid metal. This further facilitates the pumping of liquid fluid by the induction electromagnetic pump 100.

[0057] In one implementation, the inner iron core 11 is a hollow cylindrical structure. This design can reduce the weight of the inner iron core 11, thereby reducing the overall weight of the induction electromagnetic pump 100, making the induction electromagnetic pump 100 lighter, and reducing the material requirements of the inner iron core 11, thus reducing the production cost of the induction electromagnetic pump 100.

[0058] like Figure 6 and Figure 9As shown, in one embodiment, the induction electromagnetic pump 100 further includes a pole piece 19. The pole piece 19 has a ring structure and is sleeved on the outer tube wall 122. The pole piece 19 is located between the outer tube wall 122 and the vertical portion 142. With this configuration, the pole piece 19 can optimize the induced magnetic field generated by the annular winding 13, thereby improving the uniformity of the induced magnetic field. This, in turn, can improve the uniformity of the eddy currents generated by the liquid metal in the induced magnetic field, thereby improving the uniformity of the Ampere force generated by the interaction between the eddy currents and the induced magnetic field. This, in turn, improves the uniformity of the Ampere force driving the liquid metal flow, and further improves the stability of the induction electromagnetic pump 100 driving the liquid metal flow.

[0059] Secondly, when assembling the induction electromagnetic pump 100, the pole shoe 19 of the annular structure can be first fitted onto the outer tube wall 122, and then the pump groove structure 12, the annular winding 13, and the outer iron core 14 can be assembled, thereby avoiding interference between the annular winding 13 and the outer iron core 14 and the assembly of the pole shoe 19, which is conducive to improving the assembly convenience of the induction electromagnetic pump 100.

[0060] In some embodiments, the pole shoe 19 is made of silicon steel sheet, which has high magnetic permeability and low iron loss, thereby helping to reduce eddy current losses of the pole shoe 19. In some embodiments, the pole shoe 19 is connected to the outer tube wall 122 by insulating adhesive.

[0061] As another implementation method, refer to Figure 9 The pole piece 19 is formed by stacking multiple silicon steel sheets radially along the pump groove structure 12. This arrangement allows the pole piece 19 to meet the requirement of improving the uniformity of the induced magnetic field, thereby enhancing the stability of the induction electromagnetic pump 100 in driving the flow of liquid metal. Secondly, the stacking arrangement can isolate the eddy current path of the pole piece 19 radially along the pump groove structure 12, which helps reduce the accumulated induced electromotive force on each silicon steel sheet, further reducing eddy current losses in the pole piece 19. In some embodiments, the multiple silicon steel sheets are connected by insulating adhesive.

[0062] like Figure 10 As shown, in another embodiment, the pole shoe 19 has at least one opening 191 along the circumference of the pump groove structure 12. With this configuration, the eddy current path of the pole shoe 19 along the circumference of the pump groove structure 12 can be blocked through the opening 191, which helps to reduce the accumulated induced electromotive force on the pole shoe 19 and further reduce the eddy current loss of the pole shoe 19.

[0063] When the pole shoe 19 has at least two openings 191, the pole shoe 19 includes multiple arc-shaped pole shoes 19, which are distributed circumferentially along the outer pipe wall 122 to form a ring-shaped pole shoe 19. With this arrangement, multiple independent arc-shaped pole shoes 19 can completely isolate the eddy current path of two adjacent arc-shaped pole shoes 19 along the circumferential direction of the pump groove structure 12, thereby further reducing the eddy current loss of the pole shoe 19.

[0064] In another embodiment, the pole shoe 19 is formed by stacking multiple silicon steel sheets radially along the pump groove structure 12, and each silicon steel sheet has at least one opening 191 along the circumference of the pump groove structure 12. This arrangement can isolate the eddy current path both radially and circumferentially along the pump groove structure 12, thereby further reducing the eddy current loss of the pole shoe 19.

[0065] like Figure 11 As shown, in one embodiment, two adjacent vertical portions 142 correspond to one pole piece 19, such that a closed groove 192 is formed between the pole piece 19 and the two adjacent vertical portions 142. This arrangement improves the uniformity of the induced magnetic field generated by the annular winding 13, thereby further enhancing the effect of the pole piece 19 in optimizing the induced magnetic field generated by the winding. This is beneficial for further improving the overall efficiency and stability of the induction electromagnetic pump 100 in driving the flow of liquid metal.

[0066] like Figure 6 As shown, in another embodiment, two adjacent vertical portions 142 correspond to two pole shoes 19, with a gap between the two pole shoes 19, forming a semi-open groove 193 between the two pole shoes 19 and the two adjacent vertical portions 142. This configuration allows the semi-open groove 193 to block the eddy current path of the pole shoes 19 along the axial direction of the pump groove structure 12, further reducing eddy current losses while optimizing the induced magnetic field generated by the windings through the pole shoes 19. On the other hand, the semi-open groove 193 can also block the leakage magnetic field path of the pole shoes 19 along the axial direction of the pump groove structure 12, improving magnetic field uniformity and increasing the magnetic flux entering the liquid metal, which is beneficial for further improving the overall efficiency and stability of the induction electromagnetic pump 100 in driving the liquid metal flow.

[0067] In summary, the eddy current path of the pole shoe 19 along the radial direction of the pump groove structure 12 can be blocked by stacking silicon steel sheets; the eddy current path of the pole shoe 19 along the circumferential direction of the pump groove structure 12 can be blocked by the opening 191; and the eddy current path of the pole shoe 19 along the axial direction of the pump groove structure 12 can be blocked by the semi-open groove 193, thus also blocking the leakage magnetic path of the pole shoe 19 along the axial direction of the pump groove structure 12. These features help reduce the eddy current loss of the pole shoe 19, increase the magnetic flux entering the liquid metal, and thereby improve the efficiency and stability of the induction electromagnetic pump 100 in driving the liquid metal flow.

[0068] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An induction electromagnetic pump, characterized in that, include: The inner iron core is shaped like a shaft. The pump channel structure is a hollow ring structure and includes an inner tube wall and an outer tube wall. The inner tube wall is sleeved on the inner iron core and fixedly connected to the inner iron core. The end of the pump channel structure that receives liquid metal is defined as the input end, and the end of the pump channel structure that outputs the liquid metal is defined as the output end. Multiple support structures are connected between the inner tube wall and the outer tube wall. The multiple support structures are located at the input end and the output end, respectively. The support structures can support the inner tube wall and the outer tube wall and can reduce the thrust caused by the end effect that is opposite to the flow direction of the liquid metal. Multiple annular windings are sleeved on the outer pipe wall and arranged at equal intervals along the axial direction of the pump groove structure; Multiple outer iron cores are evenly arranged around the outer tube wall. Each outer iron core includes a horizontal part and multiple vertical parts. The multiple vertical parts are connected to the side of the horizontal part near the pump groove structure. Each annular winding is located between two adjacent vertical parts. The conductivity of the support structure is less than that of the liquid metal. Each support structure includes an internal support portion along the radial direction of the pump groove structure. The internal support portion is the part of the support structure that overlaps with the outer iron core and the annular winding. The internal support portion can reduce the thrust caused by the end effect that is opposite to the flow direction of the liquid metal.

2. The induction electromagnetic pump according to claim 1, characterized in that, The maximum length of the internal support portion along the axial direction of the pump groove structure is greater than one-tenth of the pole pitch and less than one-half of the pole pitch of the induction electromagnetic pump.

3. The induction electromagnetic pump according to claim 1 or 2, characterized in that, The support structure includes multiple first support structures and multiple second support structures. The multiple first support structures and multiple second support structures are all connected between the inner tube wall and the outer tube wall. The multiple first support structures are all evenly arranged along the circumference of the inner tube wall at the input end, and the multiple second support structures are all evenly arranged along the circumference of the inner tube wall at the output end. The maximum length of the first support structure along the axial direction of the pump trench structure is less than the maximum length of the second support structure along the axial direction of the pump trench structure.

4. The induction electromagnetic pump according to claim 2, characterized in that, Along the radial direction of the pump groove structure, the portion of the support structure that does not overlap with the outer iron core and the annular winding is defined as the external support portion. The maximum length of the external support portion along the axial direction of the pump groove structure is greater than one-twentieth of the pole pitch and less than one-half of the pole pitch of the induction electromagnetic pump.

5. The induction electromagnetic pump according to claim 1, characterized in that, The induction electromagnetic pump also includes: Two end caps are provided, and multiple outer iron cores are located between the two end caps. The two end caps are respectively connected to both sides of each outer iron core along the axial direction of the pump groove structure. Two external pipes, each of which is connected to one of the end caps, one of which is connected to the input end and the other of which is connected to the output end; A guide structure, which has an oval head and is located inside the outer pipe, is provided. The end of the guide structure with the largest diameter is connected to the inner pipe wall. The maximum diameter of the guide structure is equal to the outer diameter of the inner pipe wall.

6. The induction electromagnetic pump according to claim 1, characterized in that, The inner iron core has a hollow cylindrical structure.

7. The induction electromagnetic pump according to claim 1, characterized in that, The induction electromagnetic pump also includes a pole shoe, which has a ring structure and is fitted onto the outer pipe wall. The pole shoe is located between the outer pipe wall and the vertical part. The pole shoe is made of silicon steel sheet, or the pole shoe is formed by stacking multiple silicon steel sheets radially along the pump groove structure.

8. The induction electromagnetic pump according to claim 7, characterized in that, Each pair of adjacent vertical portions corresponds to one pole shoe, such that a closed groove is formed between the pole shoe and the two adjacent vertical portions.

9. The induction electromagnetic pump according to claim 7, characterized in that, Two adjacent vertical portions correspond to two pole shoes, and there is a gap between the two pole shoes so that a semi-open groove is formed between the two pole shoes and the two adjacent vertical portions.

10. The induction electromagnetic pump according to claim 7, characterized in that, The pole shoe includes multiple arc-shaped pole shoes, which are distributed circumferentially along the outer tube wall to form a pole shoe with a ring structure.

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