Induction type electromagnetic pump

Abstract

The invention discloses an induction type electromagnetic pump. The induction type electromagnetic pump comprises an inner iron core, a pump groove structure, a plurality of supporting structures, a plurality of annular windings and a plurality of outer iron cores. The pump groove structure is of a hollow ring body structure and comprises an inner pipe wall and an outer pipe wall, the end, receiving liquid metal, of the pump groove structure is defined as an input end, and the end, outputting the liquid metal, of the pump groove structure is defined as an output end. And the multiple supporting structures are connected between the inner pipe wall and the outer pipe wall and located at the input end and the output end correspondingly, and the thrust which is brought by the end effect and is opposite to the flowing direction of the liquid metal can be reduced. Through the arrangement, the supporting structure can improve the connection stability of the outer pipe wall and the inner pipe wall, the induction type electromagnetic pump can pump liquid metal conveniently, and the total thrust of the induction type electromagnetic pump on the liquid metal in the flowing direction can be improved.

Description

Technical Field

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

[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 the 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, which includes an inner pipe wall and an outer pipe wall, between which the liquid metal flows. Existing induction electromagnetic pumps lack a stable connection between the inner and outer pipe walls, resulting in insufficient strength of the inner and outer pipe walls. Furthermore, when pumping liquid metal, the input and output ends of the pipe are at the edges of the induced magnetic field generated by the induction electromagnetic pump. This results in uneven or even reversed magnetic fields at the input and output ends (i.e., the end effect generated by the electromagnetic pump). This, in turn, creates an Ampere force at the input and output ends that is opposite to the direction of liquid metal flow, reducing the total thrust of the induction electromagnetic pump on the liquid metal along the flow direction. Summary of the Invention

[0004] In order to address the deficiencies of the prior art, the purpose of this application is to provide an induction electromagnetic pump, which can improve the connection stability between the inner tube wall and the outer tube wall, and increase the total thrust of the induction electromagnetic pump on the liquid metal along the flow direction.

[0005] To achieve the above objectives, this application adopts the following technical solutions: An induction electromagnetic pump comprises an inner core, a pump channel structure, multiple support structures, multiple annular windings, and multiple outer cores. The inner core is a shaft; the pump channel structure is a hollow annular structure comprising an inner tube wall and an outer tube wall, the inner tube wall being sheathed around the inner core and fixedly connected to the inner core. The end of the pump channel structure that receives liquid metal is defined as an input end, and the end of the pump channel structure that outputs liquid metal is defined as an output end. The multiple support structures are connected between the inner tube wall and the outer tube wall, and 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 the liquid metal caused by the end effect. The multiple annular windings are sheathed around the outer tube wall and arranged at equal intervals along the axial direction of the pump channel structure. The multiple outer cores are evenly arranged around the outer tube wall, each outer core comprising a transverse portion and multiple vertical portions, the multiple vertical portions being connected to the side of the transverse portion close to the pump channel structure, and each annular winding is located between two corresponding adjacent vertical portions.

[0006] Furthermore, along the radial direction of the pump trench structure, the part of the support structure overlapping the outer iron core and the annular winding is defined as an internal support portion, and the maximum length of the internal support portion along the axial direction of the pump trench structure is greater than one tenth of the pole pitch and less than one half of the pole pitch of the induction electromagnetic pump.

[0007] Furthermore, the support structure includes multiple first support structures and multiple second support structures, and the multiple first support structures and the 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 at the input end along the circumference of the inner tube wall, and the multiple second support structures are all evenly arranged at the output end along the circumference of the inner tube wall; 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.

[0008] Furthermore, along the radial direction of the pump trench structure, the portion of the support structure that does not overlap with the outer iron core and the annular winding is defined as an external support portion, and the maximum length of the external support portion along the axial direction of the pump trench structure is greater than one twentieth of the pole pitch and less than one half of the pole pitch of the induction electromagnetic pump.

[0009] Furthermore, the induction electromagnetic pump includes two end caps, two external pipes, and a guide structure. Multiple external cores are located between the two end caps, with the two end caps connected to each external core on either side along the axial direction of the pump groove structure. Each external pipe is connected to an end cap, with one external pipe connected to the input end and the other to the output end. The guide structure has an oval head structure and is located within the external pipe. 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.

[0010] Furthermore, the inner iron core has a hollow cylindrical structure.

[0011] Furthermore, the induction electromagnetic pump also includes a pole shoe, which has a ring structure and is sleeved on the outer tube wall, and the pole shoe is located between the outer tube wall and the vertical part; the pole shoe is made of silicon steel sheet, or the pole shoe is composed of multiple silicon steel sheets stacked radially along the pump groove structure.

[0012] Furthermore, two adjacent vertical portions correspond to one pole shoe, so that a closed groove is formed between the pole shoe and the two adjacent vertical portions.

[0013] Furthermore, 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.

[0014] Furthermore, the pole shoe includes a plurality of arc-shaped pole shoes, and the plurality of arc-shaped pole shoes are distributed along the circumference of the outer tube wall to form a pole shoe with a ring structure.

[0015] The above-mentioned induction electromagnetic pump is provided with a support structure at the input end and the output end. The support structure can improve the connection stability between the inner tube wall and the outer tube wall, which is beneficial to the induction electromagnetic pump pumping liquid metal, and the conductivity of the support structure is lower than the conductivity of the liquid metal, thereby reducing the overall conductivity of the input end and the output end, and further reducing the Ampere force formed at the input end and the output end in the opposite direction of the flow direction of the liquid metal, which is beneficial to improving the total thrust of the induction electromagnetic pump on the liquid metal pumping along the flow direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the induction electromagnetic pump provided in an embodiment of the present application.

[0017] Figure 2 A schematic diagram of the combination of the annular winding, outer iron core, inner iron core and pump groove structure of the induction electromagnetic pump provided in an embodiment of the present application.

[0018] Figure 3 This is a cross-sectional schematic diagram of the induction electromagnetic pump provided in an embodiment of the present application.

[0019] Figure 4 The present invention provides a schematic diagram of a curve showing the relationship between thrust and flow rate when an induction electromagnetic pump is used to pump liquid metal along the flow direction under the working condition that the inner and outer tube walls are made of non-insulating materials.

[0020] Figure 5 The present invention provides a schematic diagram of a curve showing the relationship between thrust and flow rate when an induction electromagnetic pump is used to pump liquid metal along the flow direction under the working condition that the inner and outer tube walls are made of insulating materials.

[0021] Figure 6 Provided in the embodiments of this application Figure 3 Enlarged schematic diagram of point A in the middle.

[0022] Figure 7 This is a force analysis diagram of liquid metal in an induction electromagnetic pump without a supporting structure.

[0023] Figure 8 This is a force analysis diagram of liquid metal in the induction electromagnetic pump provided in an embodiment of the present application.

[0024] Figure 9 Schematic diagram of the combination of the pump groove structure and pole shoe of the induction electromagnetic pump provided in an embodiment of the present application.

[0025] Figure 10 A schematic structural diagram of the pole shoe of the induction electromagnetic pump provided in an embodiment of the present application.

[0026] Figure 11 This is a schematic structural diagram of the closed slot of the induction electromagnetic pump provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the specific implementation of the present application will be clearly and completely described below in conjunction with the drawings in the implementation of the present application.

[0028] It should be noted that the words "first", "second" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but rather indicate the presence of at least one. "Multiple" or "several" means at least two. Unless otherwise specified, words such as "front", "back", "left", "right", "bottom" and / or "top" are used for ease of description only and are not limited to one position or one spatial orientation. Words such as "include" or "comprising" and similar terms mean that the elements or objects appearing before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Words such as "connected" or "connected" and similar terms are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0029] As used in this specification and the appended claims, the singular forms "a," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0030] like Figure 1 and Figure 2As shown, the present application provides an induction electromagnetic pump 100, which includes an inner iron core 11, a pump groove structure 12, a toroidal 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 is a hollow ring structure and includes an inner tube wall 121 and an outer tube wall 122. A circulation space is formed between the inner tube wall 121 and the outer tube wall 122, and the liquid metal can flow in the circulation space. There are multiple toroidal windings 13 and outer iron cores 14, and the multiple toroidal windings 13 are all sleeved on the outer tube wall 122. The multiple outer iron cores 14 are evenly arranged around the outer tube wall 122. The toroidal windings 13 can be connected to a power supply 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 the 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 that propels the liquid metal, thereby 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 the present application can also pump other conductive fluids, and this application does not limit this.

[0031] 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, and the flow direction of the liquid metal is from the input end 123 to the output end 124.

[0032] In some embodiments, the inner core 11 is embedded in the inner tube wall 121 so that the inner core 11 and the inner tube wall 121 are interference-connected, thereby fixing the inner core 11 and the inner tube wall 121 in a fixed connection.

[0033] Specifically, the 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, thereby improving the flow stability of the liquid metal in the flow space, and further improving the stability of the induction electromagnetic pump 100 in pumping the liquid metal.

[0034] More specifically, refer to Figure 2Each outer iron core 14 includes a transverse portion 141 and multiple vertical portions 142. The multiple vertical portions 142 are connected to the side of the transverse 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, facilitating the spacing of the annular windings 13. Furthermore, the outer iron core 14 increases the intensity of the induced magnetic field generated by the annular windings 13, thereby further enhancing the ampere force that propels the liquid metal, thereby increasing the thrust of the induction electromagnetic pump 100 in pumping the liquid metal along the flow direction.

[0035] like Figure 2 and Figure 3 As shown, in this embodiment, the induction electromagnetic pump 100 further includes a support structure 15. A plurality of support structures 15 are provided, and the support structures 15 are capable of supporting the inner tube wall 121 and the outer tube wall 122. This arrangement improves the connection stability between the inner tube wall 121 and the outer tube wall 122 through the support structures 15, thereby improving the structural strength of the pump groove structure 12, which is beneficial for the induction electromagnetic pump 100 to pump liquid metal.

[0036] 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, in order to facilitate the connection between the inner tube wall and the outer tube wall, it is usually necessary to extend the inner tube wall and the outer tube wall, and install a sleeve or other fixing structure on the extension section of the outer tube wall and the inner tube wall to connect the inner tube wall and the outer tube wall. However, the extended outer tube wall and the inner tube wall will aggravate the end effect of the induction electromagnetic pump. Therefore, the present application connects the support structure 15 between the inner tube wall 121 and the outer tube wall 122, so that the inner tube wall 121 and the outer tube wall 122 can be connected without extending the inner tube wall 121 and the outer tube wall 122, which can avoid the aggravation of the end effect of the induction electromagnetic pump 100 caused by extending the inner tube wall 121 and the outer tube wall 122, thereby facilitating the improvement of the total thrust of the induction electromagnetic pump 100 for pumping liquid metal along the flow direction.

[0037] More specifically, the multiple support structures 15 are located at the input end 123 and the output end 124, respectively, and can reduce the thrust generated by the end effect in the direction opposite to the flow of the liquid metal. It should be noted that the electrical conductivity of the support structures 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 reduce the Ampere force generated by the input end 123 and the output end 124 in the direction opposite to the flow of the liquid metal, thereby facilitating an increase in the total thrust of the induction electromagnetic pump 100 in pumping the liquid metal in the direction of flow, thereby improving the performance of the induction electromagnetic pump 100.

[0038] 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 extending the inner tube wall 121 and the outer tube wall 122, which is beneficial to reducing the end effect of the induction electromagnetic pump 100. The support structure 15 can reduce the Ampere force formed by the input end 123 and the output end 124 in the opposite direction of the flow direction of the liquid metal, further reducing the end effect of the induction electromagnetic pump 100, thereby increasing the total thrust of the induction electromagnetic pump 100 on the liquid metal pumping along the flow direction, and further improving the performance of the induction electromagnetic pump 100.

[0039] In the present application, the inner tube wall 121 and the outer tube wall 122 can both be insulating materials or non-insulating materials. Among them, the non-insulating material can be stainless steel, aluminum alloy, etc. The non-insulating material has a high mechanical strength, which is beneficial to improve the structural strength of the pump groove structure 12, and further helps to improve the stability of the induction electromagnetic pump 100 in conveying liquid metal. The insulating material can be ceramic, plastic, glass, etc. Due to the non-conductive property of the insulating material, it can avoid the induced magnetic field generated by the winding from generating eddy current loss on the inner tube wall 121 and the outer tube wall 122, which is beneficial for the induced magnetic field generated by the winding to act concentratedly on the liquid metal to generate the Ampere force that can drive the liquid metal to flow, thereby improving the total thrust of the induction electromagnetic pump 100 on the liquid metal pumping along the flow direction.

[0040] like Figure 4 As shown, under the working condition that the inner tube wall 121 and the outer tube wall 122 are made of non-insulating materials, the total thrust of the induction electromagnetic pump 100 provided with a support structure 15 on the liquid metal pumped along the flow direction and the total thrust of the induction electromagnetic pump without a support structure 15 on the liquid metal pumped along the flow direction are measured. Among them, the vertical axis is the total thrust of the induction electromagnetic pump on the liquid metal pumped along the flow direction, the horizontal axis is the flow rate of the liquid metal in the induction electromagnetic pump, the red line segment is the relationship curve between the total thrust and flow rate of the induction electromagnetic pump 100 provided with a support structure 15 on the liquid metal pumped along the flow direction, and the blue line segment is the relationship curve between the total thrust and flow rate of the induction electromagnetic pump without a support structure 15 on the liquid metal pumped along the flow direction. According to Figure 4 It can be seen that under the working condition that the inner tube wall 121 and the outer tube wall 122 are made of non-insulating materials, when the flow rate of the liquid metal is higher than 3 m / s, the total thrust of the induction electromagnetic pump 100 provided with the support structure 15 for pumping the liquid metal along the flow direction is significantly greater than the total thrust of the induction electromagnetic pump 100 provided with the support structure 15 for pumping the liquid metal along the flow direction.

[0041] like Figure 5As shown, under the working condition that the inner tube wall 121 and the outer tube wall 122 are made of insulating materials, the total thrust of the induction electromagnetic pump 100 provided with the support structure 15 on the liquid metal pumped along the flow direction and the total thrust of the induction electromagnetic pump without the support structure 15 on the liquid metal pumped along the flow direction are measured. Among them, the vertical axis is the total thrust of the induction electromagnetic pump on the liquid metal pumped along the flow direction, the horizontal axis is the flow rate of the liquid metal in the induction electromagnetic pump, the red line segment is the relationship curve between the total thrust and flow rate of the induction electromagnetic pump 100 provided with the support structure 15 on the liquid metal pumped along the flow direction, and the blue line segment is the relationship curve between the total thrust and flow rate of the induction electromagnetic pump without the support structure 15 on the liquid metal pumped along the flow direction. According to Figure 5 It can be seen that under the working condition that the inner tube wall 121 and the outer tube wall 122 are made of insulating material, when the flow rate of the liquid metal is higher than 2.5 m / s, the total thrust of the induction electromagnetic pump 100 provided with the support structure 15 for pumping the liquid metal along the flow direction is significantly greater than the total thrust of the induction electromagnetic pump 100 provided with the support structure 15 for pumping the liquid metal along the flow direction.

[0042] It should be noted that the induction electromagnetic pump 100 is usually applied to high flow rate conditions, that is, the flow rate of the liquid metal driven by the induction electromagnetic pump 100 is usually greater than 3m / s. Figure 4 and Figure 5 It can be seen that when the induction electromagnetic pump 100 is applied to a high flow rate working condition, and the inner tube wall 121 and the outer tube wall 122 are made of non-insulating material or insulating material, the total thrust of the induction electromagnetic pump 100 provided with the support structure 15 for pumping the liquid metal along the flow direction is greater than the total thrust of the induction electromagnetic pump 100 provided with the support structure 15 for pumping the liquid metal along the flow direction. Therefore, when the induction electromagnetic pump 100 provided with the support structure 15 and the induction electromagnetic pump not provided with the support structure 15 drive the metal liquid to the same flow rate, the energy consumption of the induction electromagnetic pump 100 provided with the support structure 15 can be less than that of the induction electromagnetic pump not provided with the support structure 15, which is beneficial to reducing the energy consumption of the induction electromagnetic pump 100 in driving the liquid metal.

[0043] like Figure 6As shown, as an embodiment, the portion of the support structure 15 that overlaps the outer iron core 14 and the annular winding 13 along the radial direction of the pump trench structure 12 is defined as an internal support portion 151. The maximum length L1 of the internal support portion 151 along the axial direction of the pump trench 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 trench 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 trench 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. 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 flow direction of the liquid metal.

[0044] The above arrangement prevents the maximum length L1 of the internal support portion 151 along the axial direction of the pump trench structure 12 from being too short, thereby preventing the support structure 15 from being too short. This prevents the support structure 15 from providing insufficient support strength to the inner and outer tube walls 121 and 122, thereby improving the structural strength of the pump trench structure 12 and, in turn, the stability of the induction electromagnetic pump 100 in pumping liquid metal. Furthermore, the maximum length L1 of the internal support portion 151 along the axial direction of the pump trench structure 12 can be prevented from being too long, thereby preventing the support structure 15 from being too long due to the input end 123 and output end 124 of the support structure 15 from being too large, which is opposite to the flow direction of the liquid metal. This helps to increase the total thrust of the induction electromagnetic pump 100 in pumping the liquid metal along the flow direction.

[0045] like Figure 3 As shown, as an embodiment, the support structure 15 includes multiple first support structures 152 and multiple second support structures 153. The multiple first support structures 152 and the multiple second support structures 153 are all connected between the inner tube wall 121 and the outer tube wall 122. Specifically, the multiple first support structures 152 are uniformly arranged along the circumference of the inner tube wall 121 at the input end 123, and the multiple second support structures 153 are uniformly arranged along the circumference of the inner tube wall 121 at the output end 124. This arrangement can reduce the end effect of the multiple first support structures 152 at the input end 123, and the multiple second support structures 153 can reduce the end effect of the output end 124, thereby facilitating an increase in the total thrust of the induction electromagnetic pump 100 in pumping liquid metal along the flow direction.

[0046] It should be noted that the end effect at the output end 124 of the induction electromagnetic pump 100 is typically greater than the end effect at the input end 123. Therefore, in the embodiments of the present application, the maximum length of the first support structure 152 along the axial direction of the pump trench structure 12 is smaller than the maximum length of the second support structure 153 along the axial direction of the pump trench structure 12. This arrangement allows the second support structure 153 to be more capable of reducing the end effect than the first support structure 152, thereby reducing the stronger end effect at the output end 124 and thereby increasing the total thrust of the induction electromagnetic pump 100 in pumping the liquid metal along the flow direction.

[0047] like Figure 7 and Figure 8 As shown in the figure, the thrust of the induction electromagnetic pump on the liquid metal is measured under the same working conditions, where Figure 7 This is a thrust analysis diagram of the induction electromagnetic pump on the liquid metal without the support structure 15. Figure 8 : This is a thrust analysis diagram of the induction electromagnetic pump 100 provided with a support structure 15 on the liquid metal. Figure 7 and Figure 8 The arrow in the figure indicates the flow direction of liquid metal. Figure 7 It can be seen that in the induction electromagnetic pump without the support structure 15, a large amount of Ampere force acts on the liquid metal at both ends in the opposite direction of the liquid metal flow, with a maximum output of 12×105N / m3, which is on the same order of magnitude as the Ampere force output of the electromagnetic pump in the center section. Figure 8 It can be seen that in the induction electromagnetic pump 100 equipped with the support structure 15, the reverse Lorentz force at the left and right end sections is significantly reduced to a level different from the Ampere force output in the center section of the electromagnetic pump without the support structure 15. It can be understood that, compared to an induction electromagnetic pump without the support structure 15, the induction electromagnetic pump 100 equipped with the support structure 15 can significantly reduce the Ampere force generated by the end effect, which is opposite to the flow direction of the liquid metal. This helps to increase the total thrust of the induction electromagnetic pump 100 on the liquid metal along the flow direction.

[0048] like Figure 6As shown, as an embodiment, along the radial direction of the pump trench structure 12, the portion of the support structure 15 that does not overlap with the outer iron core 14 and the annular winding 13 is defined as an external support portion 154. The maximum length L2 of the external support portion 154 along the axial direction of the pump trench structure 12 is greater than one-twentieth 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 L2 of the external support portion 154 along the axial direction of the pump trench 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. More specifically, the maximum length L2 of the external support portion 154 along the axial direction of the pump trench 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.

[0049] The above arrangement prevents the maximum length L2 of the external support portion 154 along the axial direction of the pump trench structure 12 from being too short, thereby preventing the support structure 15 from being too short. This prevents the support structure 15 from providing insufficient support strength to the inner tube wall 121 and the outer tube wall 122, thereby improving the structural strength of the pump trench structure 12 and, in turn, improving the stability of the induction electromagnetic pump 100 in pumping liquid metal. Furthermore, the maximum length L2 of the external support portion 154 along the axial direction of the pump trench structure 12 can be prevented from being too long, thereby preventing the support structure 15 from being too long due to the input end 123 and the output end 124 of the support structure 15 from being too large, 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 the liquid metal along the flow direction.

[0050] like Figure 1 and Figure 3 As shown, as an embodiment, the induction electromagnetic pump 100 further includes an end cap 16, an outer pipe 17, and a guide structure 18. The end cap 16 is used to fix the outer 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 in the outer pipe 17 and is used to guide the liquid metal.

[0051] Specifically, two end caps 16 are provided, and the plurality of outer cores 14 are positioned between the two end caps 16. The two end caps 16 are respectively connected to both sides of each outer core 14 along the axial direction of the pump groove structure 12. In some embodiments, the end caps 16 and the outer cores 14 are fixedly connected by screws. The end caps 16 can secure the outer cores 14, thereby improving the overall structural strength of the induction electromagnetic pump 100.

[0052] In some embodiments, at least one through hole 161 is defined in the end cap 16. When viewed axially from the pump trench structure 12, the through hole 161 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.

[0053] More specifically, two external pipes 17 are provided, each connected to one end cap 16 . One external pipe 17 communicates with the input end 123 , while the other communicates with the output end 124 . This arrangement allows the two external pipes 17 to connect the flow space of the pump channel structure 12 , facilitating connection of the induction electromagnetic pump 100 to an external pipe, thereby facilitating the induction electromagnetic pump 100's ability to pump liquid metal. In some embodiments, the end cap 16 and external pipe 17 are integrally formed, thereby enhancing the structural strength of the end cap 16 and external pipe 17 , and thereby enhancing the overall structural strength of the induction electromagnetic pump 100 .

[0054] In this embodiment, the guide structure 18 has an oval head structure, i.e., a torpedo-shaped structure. Specifically, the end of the guide structure 18 with the largest diameter is connected to the inner tube wall 121. This arrangement reduces flow resistance when the liquid metal flows through the outer tube 17, thereby facilitating the flow of the liquid metal within the induction electromagnetic pump 100 and, in turn, facilitating the pumping of the liquid fluid by the induction electromagnetic pump 100.

[0055] 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 configuration can prevent the liquid metal from directly contacting the inner tube wall 121, which would result in excessive flow resistance of the inner tube wall 121 to the liquid metal, thereby further facilitating the induction electromagnetic pump 100 to pump liquid fluid.

[0056] As an embodiment, the inner iron core 11 has a hollow cylindrical structure. Such a configuration 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 can reduce the material requirements of the inner iron core 11, thereby reducing the production cost of the induction electromagnetic pump 100.

[0057] like Figure 6 and Figure 9As shown, as an embodiment, the induction electromagnetic pump 100 further includes a pole shoe 19, which has an annular structure and is sleeved on the outer tube wall 122. The pole shoe 19 is located between the outer tube wall 122 and the vertical portion 142. In this configuration, the pole shoe 19 can optimize the induced magnetic field generated by the annular winding 13, thereby improving the uniformity of the induced magnetic field, and further improving 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, and further improving the uniformity of the Ampere force driving the liquid metal flow, further improving the stability of the induction electromagnetic pump 100 in driving the liquid metal flow.

[0058] Secondly, when assembling the induction electromagnetic pump 100, the pole shoe 19 of the ring structure can be first mounted on the outer tube wall 122, and then the pump groove structure 12 can be assembled with the annular winding 13 and the outer iron core 14, thereby avoiding the annular winding 13 and the outer iron core 14 interfering with the assembly of the pole shoe 19, which is conducive to improving the assembly convenience of the induction electromagnetic pump 100.

[0059] In some embodiments, the pole shoe 19 is made of silicon steel sheets, which have 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 glue.

[0060] As another embodiment, refer to Figure 9 , the pole shoe 19 is formed by a plurality of silicon steel sheets stacked radially along the pump groove structure 12. With such an arrangement, the stacking of a plurality of silicon steel sheets can enable the pole shoe 19 as a whole to meet the requirement of improving the uniformity of the induced magnetic field, thereby improving the stability of the induction electromagnetic pump 100 as a whole in driving the flow of liquid metal. Secondly, the stacking form can isolate the eddy current path of the pole shoe 19 along the radial direction of the pump groove structure 12, thereby helping to reduce the accumulated induced electromotive force on each silicon steel sheet, and helping to further reduce the eddy current loss of the pole shoe 19. In some embodiments, a plurality of silicon steel sheets are connected by insulating glue.

[0061] like Figure 10 As shown, as another embodiment, the pole shoe 19 has at least one opening 191 along the circumference of the pump groove structure 12. In this way, the eddy current path of the pole shoe 19 along the circumference of the pump groove structure 12 can be blocked by the opening 191, thereby helping to reduce the accumulated induced electromotive force on the pole shoe 19 and helping to further reduce the eddy current loss of the pole shoe 19.

[0062] When the pole shoe 19 has at least two openings 191, the pole shoe 19 includes multiple arcuate pole shoes 19, which are distributed along the circumference of the outer tube wall 122 to form a ring-shaped pole shoe 19. In this arrangement, the multiple independent arcuate pole shoes 19 can completely isolate the eddy current path between two adjacent arcuate pole shoes 19 along the circumference of the pump groove structure 12, thereby further reducing the eddy current loss of the pole shoes 19.

[0063] As another embodiment, the pole shoe 19 is composed of multiple silicon steel sheets stacked radially along the pump trench structure 12, and each silicon steel sheet has at least one opening 191 along the circumference of the pump trench structure 12. This arrangement can block the eddy current path both radially and circumferentially along the pump trench structure 12, thereby further reducing eddy current losses in the pole shoe 19.

[0064] like Figure 11 As shown, as an embodiment, two adjacent vertical portions 142 correspond to one pole shoe 19, so that a closed slot 192 is formed between the pole shoe 19 and the two adjacent vertical portions 142. In this configuration, the closed slot 192 can improve the uniformity of the induced magnetic field generated by the annular winding 13, thereby further improving the effect of the pole shoe 19 in optimizing the induced magnetic field generated by the winding, which is conducive to further improving the efficiency and stability of the induction electromagnetic pump 100 in driving the liquid metal flow.

[0065] like Figure 6 As shown, as another embodiment, two adjacent vertical portions 142 correspond to two pole shoes 19, and there is a gap between the two pole shoes 19, so that a semi-open slot 193 is formed between the two pole shoes 19 and the two adjacent vertical portions 142. In this way, the semi-open slot 193 can block the eddy current path of the pole shoe 19 along the axial direction of the pump groove structure 12, and while optimizing the induced magnetic field generated by the winding through the pole shoe 19, it can further reduce the eddy current loss of the pole shoe 19. On the other hand, the semi-open slot 193 can block the leakage magnetic path of the pole shoe 19 along the axial direction of the pump groove structure 12, while improving the uniformity of the magnetic field and increasing the magnetic flux entering the liquid metal, which is conducive to further improving the efficiency and stability of the induction electromagnetic pump 100 in driving the liquid metal flow as a whole.

[0066] In summary, the stacked silicon steel sheets can block the eddy current path of the pole shoe 19 along the radial direction of the pump groove structure 12, the openings 191 can block the eddy current path of the pole shoe 19 along the circumferential direction of the pump groove structure 12, and the semi-open slots 193 can block the eddy current path of the pole shoe 19 along the axial direction of the pump groove structure 12 and block the magnetic flux leakage path of the pole shoe 19 along the axial direction of the pump groove structure 12. The above arrangement is conducive to reducing the eddy current loss of the pole shoe 19 and increasing the magnetic flux entering the liquid metal, thereby improving the efficiency and stability of the induction electromagnetic pump 100 in driving the liquid metal flow.

[0067] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims appended to this application.

Claims

1. An induction electromagnetic pump, characterized in that: include: an inner iron core, which is in the form of an axis; The pump trench 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 trench structure that receives the liquid metal is defined as the input end, and the end of the pump trench structure that outputs the liquid metal is defined as the output end. a plurality of support structures, each of the plurality of support structures being connected between the inner tube wall and the outer tube wall, and each of the plurality of support structures being located at the input end and the output end, the support structures being capable of supporting the inner tube wall and the outer tube wall and reducing the thrust opposite to the flow direction of the liquid metal caused by the end effect; A plurality of annular windings, each of which is sleeved on the outer pipe wall and arranged at equal intervals along the axial direction of the pump trench structure; Multiple outer iron cores are evenly arranged around the outer tube wall, each of the outer iron cores includes a transverse portion and multiple vertical portions, multiple vertical portions are connected to the side of the transverse portion close to the pump groove structure, and each of the annular windings is located between corresponding two adjacent vertical portions.

2. The induction electromagnetic pump according to claim 1, characterized in that: Along the radial direction of the pump groove structure, the part of the support structure overlapping the outer iron core and the annular winding is defined as an internal support part, and the maximum length of the internal support part 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 a plurality of first support structures and a plurality of second support structures, wherein the plurality of first support structures and the plurality of second support structures are connected between the inner tube wall and the outer tube wall, the plurality of first support structures are uniformly arranged at the input end along the circumference of the inner tube wall, and the plurality of second support structures are uniformly arranged at the output end along the circumference of the inner tube wall; The maximum length of the first support structure along the axial direction of the pump groove structure is smaller than the maximum length of the second support structure along the axial direction of the pump groove structure.

4. The induction electromagnetic pump according to claim 2, characterized in that: Along the radial direction of the pump groove structure, the part of the support structure that does not overlap with the outer iron core and the annular winding is defined as an external support portion, and 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 covers, a plurality of the outer iron cores are located between the two end covers, and the two end covers 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 the external pipes is connected to one of the end caps, one of the external pipes is connected to the input end, and the other of the external pipes is connected to the output end; The guide structure is an oval head structure and is located in the outer pipe. 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 is 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 is a ring structure and is sleeved on the outer tube wall. The pole shoe is located between the outer tube wall and the vertical portion. The pole shoe is made of silicon steel sheets, or the pole shoe is formed by multiple silicon steel sheets stacked radially along the pump groove structure.

8. The induction electromagnetic pump according to claim 7, characterized in that: Two adjacent vertical portions correspond to one pole shoe, so 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 a plurality of arc-shaped pole shoes, and the plurality of arc-shaped pole shoes are distributed along the circumference of the outer tube wall to form the pole shoe with a ring structure.

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