Liquid-cooled electromagnet

Abstract

The utility model provides a liquid-cooled electromagnet, comprising a coil fixing component, an upper cover, a lower cover, and an excitation coil. The coil fixing component fixes the excitation coil and makes the excitation coil located in a coil accommodating groove of the upper cover, the coil fixing component is connected to a side of the upper cover provided with the coil accommodating groove; the lower cover is connected to a side of the upper cover provided with a cooling liquid groove, the lower cover is engaged with an opening of the cooling liquid groove to form a cooling liquid flow channel, the lower cover is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected to the cooling liquid flow channel; the liquid-cooled electromagnet provided by the utility model has a compact structure, the excitation coil and the cooling liquid groove are close to each other, the temperature transfer path is greatly shortened, the temperature adjustment efficiency of the excitation coil is high, and the temperature adjustment and control effects are better.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnets, and in particular relates to a liquid-cooled electromagnet. Background Art

[0002] An electromagnet is a device that generates a magnetic field through electric current. Its basic structure usually includes an iron core and a coil winding. When current passes through the coil winding, a magnetic field is generated around the iron core. The magnetic field passes through the iron core and extends outward, thereby providing a corresponding magnetic field.

[0003] Electromagnets generate magnetic fields based on current flowing through their coil windings, but this process is often accompanied by significant Joule heating, especially under high load or continuous operation. This heat buildup can not only lead to degradation of electromagnet performance, such as unstable magnetic field strength, but can also shorten the overall life of the device and increase failure rates.

[0004] Therefore, it is necessary to provide an electromagnet that can prevent the coil winding temperature from being too high.

[0005] The above information disclosed in the background technology section is only used to enhance the understanding of the background of the present invention and therefore may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0006] In order to provide an electromagnet capable of preventing the coil winding temperature from being too high, the utility model provides a liquid-cooled electromagnet, comprising a coil fixing assembly, an upper cover, a lower cover, and an excitation coil, wherein the coil fixing assembly is provided with a positioning column, and the excitation coil is sleeved on the positioning column; a coil accommodating groove is provided on one side of the upper cover, and a cooling liquid groove is provided on the other side, the positioning column and the excitation coil are arranged in the coil accommodating groove, and the coil fixing assembly is connected to the side of the upper cover provided with the coil accommodating groove; the lower cover is connected to the side of the upper cover provided with the cooling liquid groove, the lower cover is engaged with the opening of the cooling liquid groove to form a cooling liquid flow channel, and the lower cover is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected to the cooling liquid flow channel.

[0007] According to a possible implementation of the utility model, the liquid-cooled electromagnet also includes a sealing gasket, which is arranged between the upper cover and the lower cover and clamped by the upper cover and the lower cover, and the sealing gasket is provided with a liquid inlet hole and a liquid outlet hole at positions corresponding to the liquid inlet and the liquid outlet.

[0008] According to a possible implementation of the present invention, a countersunk hole is provided at one end of the positioning column close to the lower cover, and the countersunk hole is communicated with the cooling liquid tank.

[0009] According to a possible implementation of the utility model, the upper cover is provided with a through hole connecting the coil accommodating groove and the cooling liquid groove, and one end of the positioning column provided with the countersunk hole is connected to the through hole to close the through hole.

[0010] According to a possible implementation of the present invention, one end of the positioning column provided with the countersunk hole passes through the upper cover and connects the countersunk hole with the coolant tank.

[0011] According to a possible implementation of the utility model, the lower cover is provided with a sensor accommodating column extending toward one side of the coil fixing assembly, the sensor accommodating column is provided with a sensor accommodating cavity, the sensor accommodating column extends into the countersunk hole, and a gap is left between the sensor accommodating column and the countersunk hole and the through hole.

[0012] According to a possible implementation of the utility model, the lower cover is provided with a sensor accommodating column extending toward one side of the coil fixing assembly, the sensor accommodating column is provided with a sensor accommodating cavity, and the opening of the sensor accommodating cavity is provided on a side of the lower cover away from the upper cover.

[0013] According to a possible implementation of the present invention, the sensor accommodating column passes through the upper cover and extends into the inner side of the positioning column.

[0014] According to a possible implementation of the present invention, at least a portion of the cooling liquid groove extends to a side surface of the coil accommodating groove.

[0015] According to a possible implementation of the present invention, the upper cover is provided with a cable accommodating portion, and the cable accommodating portion enables the outside of the upper cover to communicate with the coil accommodating groove.

[0016] The utility model has at least the following beneficial effects: compact structure, the excitation coil and the cooling liquid tank are located close to each other, which greatly shortens the temperature transfer path, makes the temperature adjustment efficiency of the excitation coil higher, and the temperature adjustment and control effects are better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall appearance of an embodiment of the utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of another perspective of the illustrated embodiment.

[0019] Figure 3 for Figure 1 Exploded view of the illustrated embodiment.

[0020] Figure 4 for Figure 1Top view of the illustrated embodiment.

[0021] Figure 5 for Figure 4 Sectional view along line AA of the illustrated embodiment.

[0022] Figure 6 for Figure 5 An enlarged view of portion B of the illustrated embodiment.

[0023] Figure 7 It is a schematic structural diagram of an upper cover according to an embodiment of the utility model.

[0024] In the figure: 100, coil fixing assembly; 110, coil fixing assembly body; 120, positioning column; 130, countersunk hole; 140, coil positioning plate; 200, upper cover; 210, coil accommodating groove; 220, cooling liquid groove; 221, deep groove part; 230, through hole; 240, cable accommodating part; 300, lower cover; 310, lower cover body; 321, liquid inlet; 322, liquid outlet; 330, sensor accommodating column; 331, opening; 332, sensor accommodating cavity; 400, excitation coil; 500, sealing gasket; 501, liquid inlet hole; 502, liquid outlet hole; 600, screw. DETAILED DESCRIPTION

[0025] In order to make the purpose and features of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are further described below in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and use inaccurate ratios, which are only used to conveniently and clearly assist in explaining the embodiments of the utility model.

[0026] The utility model provides a liquid-cooled electromagnet, comprising a coil fixing assembly 100, an upper cover 200, a lower cover 300, and an excitation coil 400. The excitation coil 400 is fixed to the coil fixing assembly 100 and arranged in the inner cavity of the upper cover 200, so that the overall structure of the electromagnet is compact.

[0027] The coil fixing assembly 100 is provided with a positioning post 120, and the excitation coil 400 is sleeved on the positioning post 120. The coil fixing assembly 100 may include a coil fixing assembly body 110 and a positioning post 120, and the positioning post 120 is arranged on the coil fixing assembly body 110. The excitation coil 400 is sleeved on the positioning post 120, so that the excitation coil 400 and the positioning post 120 can be connected, or they can be connected with components such as adapters and fixings. Figure 5 In the embodiment shown, the excitation coil 400 is sleeved on the positioning post 120 and is in direct contact with the positioning post 120. In some cases, other fixing auxiliary elements may be provided to fix the excitation coil 400 from a position other than the inner side of the inner ring of the excitation coil 400. Figure 5 , Figure 6 In the illustrated embodiment, the positioning column 120 is connected to a coil positioning plate 140, and the coil positioning plate 140 is connected to the excitation coil 400 from one side of the excitation coil 400. More specifically, the excitation coil 400 can be fixed from both sides of the excitation coil 400 by using the coil positioning plate 140 and the coil fixing assembly body 110, for example, the excitation coil can be clamped from both sides of the excitation coil 400.

[0028] When multiple excitation coils 400 are provided, the multiple excitation coils 400 can be coaxially arranged, and the multiple excitation coils 400 are all sleeved on the positioning column 120 to facilitate the positioning of the multiple excitation coils 400. In addition, a coil positioning plate 140 can be provided between the excitation coils 400 to facilitate the respective fixing of each excitation coil 400.

[0029] In some cases, the positioning column 120 can also serve as the iron core of the electromagnet and work together with the excitation coil 400 to adjust the magnetic field generated by the excitation coil 400 so that the magnetic field generated by the electromagnet provided by the present invention meets the preset requirements.

[0030] See also Figures 1 to 5 , the magnetic field generated by the excitation coil 400 will at least extend along the axial direction of the excitation coil 400. For the electromagnet provided by the utility model, the magnetic field generated by the excitation component 400 can at least extend to the outside of the coil fixing component 100. Specifically, the side of the coil fixing component 100 where the positioning column 120 is not provided can be used as the working side to provide a corresponding magnetic field to the outside of the electromagnet provided by the utility model. Of course, the shape of the working side of the coil fixing component 100 can be set according to specific needs. Figures 1 to 5 In the provided embodiment, the working side of the coil fixing assembly 100 can be configured as a plane to facilitate placement of corresponding external components or to be combined with external components. Of course, the working side of the coil fixing assembly 100 can also be set to a shape that matches the corresponding component, for example, when providing the magnetic field environment required for detection of this row of wafers, the working side of the coil fixing assembly 100 is set to the shape of the wafer; when providing a magnetic field to a narrow area, the working side of the coil fixing assembly 100 is set to a shape that extends outward; and so on.

[0031] A coil receiving groove 210 is provided on one side of the upper cover 200 to receive the excitation coil 400 and a positioning column 120 for positioning and fixing the excitation coil 400. Figure 3In the illustrated embodiment, the shape of the coil accommodating groove 210 matches the shape of the excitation coil 400. In some cases, the coil accommodating groove 210 is slightly larger than the excitation coil 400 to facilitate the installation and fixation of the excitation coil 400 and the corresponding circuit. In order to position the excitation coil 400 in the coil accommodating groove 210, a positioning column 120 may also be accommodated in the coil accommodating groove 210. The coil fixing assembly 100 is connected to a side of the upper cover 200 where the coil accommodating groove is provided, so that the relative position of the coil fixing assembly 100 and the upper cover 200 is fixed, and further, the position of the excitation coil 400 in the coil accommodating groove 210 is relatively fixed.

[0032] As for the fixing method between the coil fixing component 100 and the upper cover 200, and the upper cover 200 and the lower cover 300, the corresponding fixing method can be selected according to the needs, for example, the connection can be carried out by means of snap-on, plug-in, gluing, etc.; it can also be connected by using connecting parts, for example, connecting by using screws 600; it is also possible to form a matching connection structure between the coil fixing component 100 and the upper cover 200, and the upper cover 200 and the lower cover 300 for connection, for example, mutually matching threads are set between the coil fixing component 100 and the upper cover 200, and between the upper cover 200 and the lower cover 300, and the connection is carried out by using a threaded structure.

[0033] A cooling liquid tank 220 is provided on one side of the upper cover 200. The cooling liquid tank 220 and the coil receiving tank 210 are respectively provided on both sides of the upper cover 200. The lower cover 300 is connected to the side of the upper cover 200 where the cooling liquid tank 220 is provided. The lower cover is engaged with the opening of the cooling liquid tank 220 to form a cooling liquid flow channel. The cooling liquid tank 220 is used for the flow of cooling liquid. Figure 3 The lower cover body 310 of the lower cover 300 may be configured to be flat, and in particular, the shape of the side of the lower cover body 310 that contacts the cooling liquid tank 220 matches the cooling liquid tank 220. Figure 7 , Figure 3 , the opening side of the cooling liquid tank 220 is set as a plane, and accordingly, the side of the lower cover body 310 close to the cooling liquid tank 220 is also set as a plane to ensure the formation of an effective cooling liquid flow channel. In addition, a corresponding matching structure can be set on the side of the lower cover body 310 close to the cooling liquid tank 220 to match the cooling liquid tank 220. For example, a protrusion can be set on the lower cover body 310, and the protrusion can be embedded in the cooling liquid tank 220; and so on.

[0034] When in use, the excitation coil 400 is energized and generates heat, and the heat generated by the excitation coil 400 is transferred to the upper cover 200. The coolant flows in the coolant tank 220 of the upper cover 200, and takes away the heat transferred from the excitation coil 400 to the upper cover 200, thereby preventing the temperature of the electromagnet from continuing to rise. In some cases, a refrigerant can also be introduced into the coolant flow channel, and the cold carried by the refrigerant can be used to further reduce the temperature of the upper cover 200, thereby making the temperature of the environment where the excitation coil 400 is located at a lower level.

[0035] Since the excitation coil 400 and the cooling liquid tank 220 are respectively located on both sides of the upper cover 200 and are close to each other from both sides of the upper cover 200, the positions of the two are close to each other, which greatly shortens the temperature transfer path, making the temperature adjustment efficiency of the excitation coil 400 higher and the temperature adjustment and control effects better.

[0036] See also Figure 7 , shows a specific form of a cooling liquid tank 220. The shape of the cooling liquid tank 220 can be adjusted as needed, for example, it can be adjusted to a serpentine setting to increase the flow path of the cooling liquid, increase the flow time of the unit cooling liquid in the liquid-cooled electromagnet, and improve the cooling effect of the cooling liquid on the coil.

[0037] For the coolant, corresponding liquids can be used as needed, for example, water, ethylene glycol solution, mineral oil, carbon dioxide, inorganic and organic salt solutions, special coolants, etc. It should be noted that, under normal circumstances, the coolant flowing in the coolant flow channel mainly utilizes the flowable nature of the coolant. In some cases, low-temperature gas can also be used, or the liquid can be evaporated in the coolant flow channel, or a gas-liquid mixture or a solid-liquid mixture coolant can be used. The above objects have similar functions and effects to the coolant and are equivalent.

[0038] The lower cover 300 is provided with a liquid inlet 321 and a liquid outlet 322, which are respectively connected to the coolant flow channel so that coolant can be introduced into the electromagnet from the outside to make the temperature of the excitation coil 400 in the electromagnet more controllable.

[0039] The liquid-cooled electromagnet provided by the utility model can effectively control the temperature rise under high load or continuous operation conditions through the built-in liquid cooling system, thereby preventing performance degradation or equipment damage caused by overheating. In addition, good temperature control also helps to improve the working efficiency of the electromagnet and extend its service life; the compact structure greatly improves the thermal management efficiency and is suitable for various industrial and scientific research occasions that require long-term or high-intensity use.

[0040] The liquid-cooled electromagnet also includes a sealing gasket 500, which is arranged between the upper cover 200 and the lower cover 300 and is clamped by the upper cover 200 and the lower cover 300 to further improve the sealing of the cooling liquid flow channel composed of the cooling liquid tank 220 and the lower cover 300. This method not only enhances the sealing effect, but also makes the entire device more stable in mechanical strength.

[0041] The sealing gasket 500 is mainly used to provide a waterproof and leakproof interface between the sealing gasket 500 and the coolant tank 220 of the upper cover 200, and between the sealing gasket 500 and the lower cover 300, so as to ensure that the coolant will not leak due to the unsealed interface when flowing in the internal flow channel. Commonly used sealing gasket materials include rubber, silicone, polytetrafluoroethylene, etc., which can be selected according to needs and the type of coolant.

[0042] The preset liquid inlet hole 501 on the sealing gasket 500 corresponds to the liquid inlet port 321, and the liquid outlet hole 502 corresponds to the liquid outlet port 322 to ensure smooth flow of the coolant. The sizes of the liquid inlet hole 501 and the liquid outlet hole 502 can be made the same as the corresponding size of the hole 341 on the lower cover 300 for coolant inlet and outlet to avoid generating additional resistance or eddy current at the interface.

[0043] Although the sealing gasket 500 is designed for long-term use, its performance may be affected by aging, wear or mechanical stress during actual operation. Therefore, regular inspection and replacement of the sealing gasket when necessary is an important maintenance measure to ensure the continuous and stable operation of the electromagnet. Please refer to 3, which shows an installation method of the sealing gasket 500, wherein the sealing gasket 500 is mainly fixed by clamping the upper cover 200 and the lower cover 300. When replacement is required, the lower cover 300 can be removed, so that the sealing gasket 500 can be easily replaced.

[0044] The end of the positioning column 120 close to the lower cover 300 is provided with a countersunk hole 130, and the countersunk hole 130 is connected to the cooling liquid tank 220, see Figure 5 , Figure 6 , showing a specific implementation. The counterbore 130 is connected to the cooling liquid tank 220 so that the coolant flowing in the cooling liquid tank 220 can enter the counterbore 130. Since the counterbore 130 is located on the positioning column 120, the coolant can cool the counterbore 130 and the positioning column 120, and further, the temperature of the excitation assembly 400 provided on the positioning column 120 can be reduced, thereby further adjusting the temperature of the excitation assembly 400.

[0045] See also Figure 5When a coolant tank 220 is provided and coolant is also passed into the counterbore 130 , it can be seen that the excitation coil 400 will be cooled by the side close to the coil receiving tank 210 and the side close to the positioning column 120 , so that the temperature adjustment of the excitation coil 400 is more uniform.

[0046] As for the communication mode between the counterbore 130 and the cooling liquid tank 220 , a corresponding through hole 230 may be provided on the cooling liquid tank 220 , and the counterbore 130 may be located at the through hole 230 .

[0047] See also Figure 5 , Figure 6 , shows a more feasible implementation, wherein the upper cover 200 is provided with a through hole 230 connecting the coil receiving groove 210 and the cooling liquid groove 220, and one end of the positioning column 120 provided with the counterbore 130 is connected to the through hole 230 to close the through hole 230. For example, the outer diameter of the positioning column 120 can be made larger than the diameter of the through hole 230, or the through hole 230 can be extended into the inner side of the counterbore 130 through a corresponding tubular structure, and a corresponding blocking structure can also be provided at the positioning column 120 to block the through hole 230.

[0048] As a feasible implementation, one end of the positioning column 120 provided with the counterbore 130 passes through the upper cover 200 and connects the counterbore 130 with the cooling liquid tank 220. Figure 5 to Figure 6 , shows a feasible implementation, specifically, the outer side of the positioning column 120 is matched with the hole wall of the through hole 230, so that the positioning column 120 seals the through hole 230. In some implementations, a sealing ring can be further provided between the positioning column 120 and the through hole 230 to further improve the sealing effect of the positioning column 120 on the through hole 230.

[0049] In some cases, it is also necessary to monitor the magnetic field generated by the excitation coil 400 to determine the state and effect of the electromagnet. Accordingly, the lower cover 300 can be provided with a sensor receiving column 330 extending toward one side of the coil fixing assembly 100, and the sensor receiving column 330 is provided with a sensor receiving cavity 332, and a sensor for measuring the magnetic field can be arranged in the sensor receiving cavity 332. Figure 5 , Figure 6 It can be seen that the sensor accommodating cavity 332 will be located inside the positioning column 120, that is, the sensor accommodating cavity 332 can provide a space for the sensor to extend into the inner side of the excitation coil 400, and further, it can facilitate monitoring of the magnetic field generated by the excitation coil 400. In some cases, in order to facilitate the installation of the sensor, the opening 331 of the sensor accommodating cavity 330 is set on the side of the lower cover 300 away from the upper cover 200.

[0050] In order to further make the position of the sensor receiving column 330 that receives the sensor close to the excitation coil 400, the sensor receiving column 330 can be extended into the inner side of the positioning column 120. Accordingly, the sensor receiving column 330 can pass through the upper cover 200 in some cases, or a corresponding structure extending into the inner side of the positioning column 120 can be provided on the upper cover 200, so that the sensor receiving column 330 can also extend into the positioning column 120. Furthermore, when the positioning column 120 is provided with a counterbore 130, the sensor receiving column 330 can also be extended into the counterbore 130.

[0051] According to the above description, in some embodiments of the present invention, the coolant tank 220 can be connected to the countersunk hole 130. In this case, a gap can be left between the sensor accommodating column 330 and the countersunk hole 130 and the through hole 230 to avoid interfering with the flow of the refrigerant between the coolant tank 220 and the countersunk hole 130.

[0052] In some cases, the cooling effect on the excitation coil 400 can be further improved. Specifically, at least a portion of the cooling liquid tank 220 can be extended to the side of the coil receiving tank 210. Figure 5 , Figure 7 , shows a feasible implementation, wherein the cooling liquid groove 220 is arranged in the form of a step groove, and the cooling liquid groove 220 is provided with a deep groove portion 221 extending toward the side of the excitation coil 400, so that the cooling liquid can cool the excitation coil 400 approximately from the side of the excitation coil 400. In order to make the cooling of the excitation coil 400 relatively uniform and symmetrical, the position of the deep groove portion 221 can be arranged symmetrically along the axis of the excitation coil 400. Figure 5 , Figure 7 It is understood that the cooling liquid groove 220 and / or the deep groove portion 221 may be provided with other shapes to meet different requirements, for example, a shape approximately in an annular shape or an arc shape may be provided.

[0053] See also Figure 3 In some cases, in order to facilitate the connection of the cable of the excitation coil 400, a cable accommodating portion 240 may be provided on the upper cover 200, and the outside of the upper cover 200 may be connected to the inside of the coil accommodating groove 210. In some cases, the connection line of the sensor may be connected to an external device through the cable accommodating portion 240, so as to detect the component temperature, magnetic field and other states in the coil accommodating groove 210.

[0054] The above shows and describes the basic principles, main features and advantages of the utility model, so the above is only an embodiment of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions only describe the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model also includes various equivalent changes and improvements, which will fall within the scope of the utility model to be protected.

Claims

1. A liquid-cooled electromagnet, characterized in that: It includes a coil fixing component, an upper cover, a lower cover, and an excitation coil. The coil fixing component is provided with a positioning column, and the excitation coil is sleeved on the positioning column; one side of the upper cover is provided with a coil accommodating groove, and the other side is provided with a cooling liquid groove, the positioning column and the excitation coil are arranged in the coil accommodating groove, and the coil fixing component is connected to the side of the upper cover where the coil accommodating groove is provided; the lower cover is connected to the side of the upper cover where the cooling liquid groove is provided, and the lower cover is engaged with the opening of the cooling liquid groove to form a cooling liquid flow channel, and the lower cover is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively connected to the cooling liquid flow channel.

2. A liquid-cooled electromagnet as claimed in claim 1, characterized in that: The liquid-cooled electromagnet also includes a sealing gasket, which is arranged between the upper cover and the lower cover and clamped by the upper cover and the lower cover. The sealing gasket is provided with a liquid inlet hole and a liquid outlet hole at positions corresponding to the liquid inlet and the liquid outlet.

3. A liquid-cooled electromagnet as claimed in claim 1, characterized in that: A countersunk hole is arranged at one end of the positioning column close to the lower cover, and the countersunk hole is communicated with the cooling liquid tank.

4. A liquid-cooled electromagnet as claimed in claim 3, characterized in that: The upper cover is provided with a through hole connecting the coil accommodating groove and the cooling liquid groove, and one end of the positioning column provided with the counterbore is connected to the through hole to close the through hole.

5. A liquid-cooled electromagnet as claimed in claim 4, characterized in that: One end of the positioning column provided with the counterbore passes through the upper cover and connects the counterbore with the cooling liquid tank.

6. A liquid-cooled electromagnet as claimed in claim 4, characterized in that: The lower cover is provided with a sensor accommodating column extending toward one side of the coil fixing assembly, the sensor accommodating column is provided with a sensor accommodating cavity, the sensor accommodating column extends into the countersunk hole, and a gap is left between the sensor accommodating column and the countersunk hole and the through hole.

7. A liquid-cooled electromagnet as claimed in claim 1, characterized in that: The lower cover is provided with a sensor accommodating column extending toward one side of the coil fixing assembly, the sensor accommodating column is provided with a sensor accommodating cavity, and the opening of the sensor accommodating cavity is provided on a side of the lower cover away from the upper cover.

8. A liquid-cooled electromagnet as claimed in claim 7, characterized in that: The sensor accommodating column passes through the upper cover and extends into the inner side of the positioning column.

9. A liquid-cooled electromagnet as claimed in claim 1, characterized in that: At least a portion of the cooling liquid tank extends to a side surface of the coil accommodating tank.

10. A liquid-cooled electromagnet as claimed in claim 1, characterized in that: The upper cover is provided with a cable accommodating portion, and the cable accommodating portion enables the outside of the upper cover to communicate with the coil accommodating groove.

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