Novel bit slice structure for water-cooled magnets and insulation mounting method

Abstract

The application discloses a new bit slice structure for water-cooled magnets and an insulation mounting method, and the bit slice structure comprises a bit slice body and a flexible insulation sheet; the bit slice body at both ends of a cut is provided with an upper mounting area and a lower mounting area, and the upper mounting area and the lower mounting area are provided with grooves; the insulation mounting method comprises the following steps: placing a first flexible insulation sheet on the upper mounting area of a first bit slice body; rotating the angle of one flexible insulation sheet to place a second bit slice body, so that the lower mounting area of the second bit slice body is pressed and combined with the top surface of the first flexible insulation sheet; and repeating the above steps to stack the bit slice bodies with the flexible insulation sheets in a staggered manner to form a spiral rising current channel. The application has the advantages that the grooves are arranged to increase the contact area of the bit slice body and the flexible insulation sheet, and the water-cooled magnet coil is enhanced in the ability of resisting unbalanced electromagnetic force between the bit slices.

Description

Technical Field

[0001] This invention relates to the field of water-cooled magnet technology, specifically to a novel bit sheet structure for water-cooled magnets and an insulating mounting method. Background Technology

[0002] Strong magnetic fields are important extreme conditions, providing unique extreme environments for scientific research. The structure and transformation processes of matter within these environments can undergo changes, offering new avenues and opening up new avenues for research in physics, chemistry, materials science, and biology. Because the higher the magnetic field strength, the greater the alteration of the electronic energy states of a material system, the more unusual phenomena occur, providing more opportunities for scientific innovation.

[0003] Water-cooled magnets are the main experimental devices in steady-state strong magnetic field laboratories. Due to their high magnetic field strength, fast excitation speed, and high experimental efficiency, they are highly regarded extreme condition experimental platforms.

[0004] MIT physicist Francis Bitter first proposed the concept of a perforated circular ring, a promising new way to generate higher magnetic fields. This perforated circular conductor was later named a bit sheet. As the magnetic fields of water-cooled magnets have become increasingly powerful, the stability of the water-cooled magnet coils has become increasingly challenging. Bit sheets and insulating sheets are stacked in a regular, staggered manner to form a spiral current channel, creating the water-cooled magnet coil. Because of the gaps in the bit sheets, under the influence of strong electromagnetic forces, the constraint conditions of the upper and lower bit sheets are inconsistent, which may lead to misalignment and slippage between the bit sheets, causing blockage of the cooling water holes, resulting in localized high temperatures and ultimately, magnet burnout. Therefore, the insulating sheet needs to not only provide insulation between bit sheets but also effectively transmit the unbalanced electromagnetic forces between the upper and lower bit sheets. For example, Chinese invention patent document CN113539589A discloses an insulating sheet for a bit-type water-cooled magnet and its insulating installation method. In this method, the insulating sheet is made of stainless steel with an insulating layer coated on the surface, and the bit sheet and the insulating sheet are two separate entities, limiting the effectiveness of transmitting the unbalanced electromagnetic forces between the bit sheets.

[0005] With the development of magnet technology, the radial outward tension of water-cooled magnet coils with higher magnetic fields has increased exponentially, and the unbalanced electromagnetic force between bit chips has also increased exponentially. The unbalanced electromagnetic force between bit chips has exceeded the transmission capacity of the insulating sheet, which can cause misalignment of magnet bit chips and insulating sheet, or even damage to the insulating sheet, leading to magnet destruction. Summary of the Invention

[0006] The technical problem to be solved by this invention is how to enhance the ability of water-cooled magnet coils to resist unbalanced electromagnetic forces between bit slices.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A novel bit sheet structure for water-cooled magnets includes a ring-shaped bit sheet body and a fan-shaped flexible insulating sheet. A slit is made along the radial direction of the bit chip body, making the bit chip body open. An upper mounting area and a lower mounting area for pressing flexible insulating sheets are respectively provided on the bit chip body at both ends of the slit. The upper mounting area and the lower mounting area are arranged diagonally along the slit. Multiple grooves are provided on the bit chip body of both the upper and lower mounting areas.

[0009] In this invention, the friction pair between the bit chip body and the elastic insulating sheet is made possible by the groove on the bit chip body. Under the electromagnetic force generated by the operation of the water-cooled magnet coil, the elastic insulating sheet with a small elastic modulus will deform and embed itself in the groove in the upper and lower mounting areas, thereby increasing the contact area between the two and increasing the friction coefficient of the friction pair between the bit chip body and the elastic insulating sheet. This, in turn, enhances the ability of the water-cooled magnet coil to resist unbalanced electromagnetic forces between the bit chips.

[0010] Preferably, the bit chip body is provided with a plurality of first cooling holes and first fixing holes, wherein the upper mounting area and the lower mounting area are each provided with at least one first fixing hole.

[0011] Preferably, the flexible insulating sheet is provided with a second cooling hole and a second fixing hole corresponding to the positions of the first cooling hole and the first fixing hole.

[0012] Preferably, the flexible insulating sheet is made of polyimide adhesive with insulating properties.

[0013] Preferably, the groove is a U-shaped groove.

[0014] Preferably, the groove has a length of 5-15 micrometers and a depth of 5-15 micrometers.

[0015] Preferably, the groove is a V-shaped groove.

[0016] Preferably, the groove has a length of 5-15 micrometers and a depth of 5-15 micrometers.

[0017] Preferably, the groove is formed by laser processing or chemical etching.

[0018] The present invention also provides an insulating mounting method for a novel bit sheet structure for water-cooled magnets, specifically including the following steps: Place the first flexible insulating sheet on the upper mounting area of ​​the first bit chip body; then rotate the flexible insulating sheet by an angle to place the second bit chip body, and press the lower mounting area of ​​the second bit chip body against the top surface of the first flexible insulating sheet. Repeat the above steps and stack them sequentially along the same rotation direction of the flexible insulating sheet, and stack the bit chip bodies with flexible insulating sheets in a staggered manner to form a spiral upward current channel.

[0019] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the friction pair between the bit chip body and the elastic insulating sheet is made possible by the groove on the bit chip body. Under the electromagnetic force generated by the operation of the water-cooled magnet coil, the elastic insulating sheet with a small elastic modulus will deform and embed itself in the groove in the upper and lower mounting areas, thereby increasing the contact area between the two and increasing the friction coefficient of the friction pair between the bit chip body and the elastic insulating sheet. This, in turn, enhances the ability of the water-cooled magnet coil to resist unbalanced electromagnetic forces between the bit chips.

[0020] In addition, there are contact surfaces between the bit chip body and the elastic insulating sheet. Each contact surface generates pressure under electromagnetic force, which in turn increases the friction between the bit chip body and the elastic insulating sheet sharply. Since the water-cooled magnet coil is formed by stacking multiple bit chip bodies and elastic insulating sheets, the friction between the bit chip body and the elastic insulating sheet in the entire water-cooled magnet coil is superimposed. The overall friction is much greater than the sum of the friction between a single bit chip body and the elastic insulating sheet, which further enhances the ability of the water-cooled magnet coil to resist unbalanced electromagnetic forces between the bit chips. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a top view of the bit chip body according to an embodiment of the present invention; Figure 3 This is a bottom view of the bit chip body according to an embodiment of the present invention; Figure 4 This is a partial cross-sectional view of the bit chip body according to an embodiment of the present invention; Figure 5 This is another partial cross-sectional view of the bit chip body according to an embodiment of the present invention. Detailed Implementation

[0022] To facilitate understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will now be further described in conjunction with the accompanying drawings.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited.

[0025] See Figures 1 to 5 This embodiment discloses a novel bit sheet structure for water-cooled magnets, including a ring-shaped bit sheet body 1 and a fan-shaped flexible insulating sheet 2.

[0026] The bit chip body 1 is provided with a plurality of first cooling holes 11 and first fixing holes 12 along its circumferential direction. A slit 101 is opened along the radial direction of the bit chip body 1, making the bit chip body 1 open. An upper mounting area 102 and a lower mounting area 103 for pressing flexible insulating sheets 2 are respectively provided on the bit chip body at both ends of the slit 101. The upper mounting area 102 and the lower mounting area 103 are arranged diagonally along the slit. A plurality of grooves 104 are provided on the bit chip body 1 of the upper mounting area 102 and the lower mounting area 103. The grooves 104 are arranged to avoid the first cooling holes 11 and the first fixing holes 12. The upper mounting area 102 and the lower mounting area 103 are each provided with at least one first fixing hole 12. In this embodiment, one first fixing hole 12 is provided.

[0027] In this embodiment, the bit chip body 1 is a high-strength, high-conductivity copper alloy or oxygen-free copper, which has high strength and high elastic modulus.

[0028] See also Figure 4 The groove 104 is a U-shaped groove with a length of 5-15 micrometers and a depth of 5-15 micrometers.

[0029] Further reading Figure 5 The groove can also be a V-shaped groove, with a length of 5-15 micrometers and a depth of 5-15 micrometers.

[0030] Specifically, the groove 104 is formed by laser processing or chemical etching.

[0031] The flexible insulating sheet 2 is provided with a second cooling hole 21 and a second fixing hole 22 corresponding to the positions of the first cooling hole 11 and the first fixing hole 12. In this embodiment, the flexible insulating sheet 2 is made of polyimide rubber with insulating properties, which has a low elastic modulus and is more easily deformed than the material of the bit sheet body 1. Similarly, in this embodiment, a second fixing hole 22 is provided on the flexible insulating sheet 2 to ensure that the flexible insulating sheet 2 can be locked and fixed between the two bit sheet bodies 1 after the fixing rod passes through the first fixing hole 12 and the second fixing hole 22.

[0032] This embodiment also discloses an insulating mounting method for a novel bit sheet structure used in water-cooled magnets, characterized by the following steps: The first flexible insulating sheet 2 is placed on the upper mounting area 102 of the first bit chip body 1; then the second bit chip body 1 is placed by rotating the flexible insulating sheet 2 by an angle, that is, the gap between the cuts 101 on the upper and lower bit chip bodies 1 is one flexible insulating sheet 2, and the lower mounting area 103 of the second bit chip body 1 is pressed against the top surface of the first flexible insulating sheet 2. The above steps are repeated and the flexible insulating sheets 2 are stacked in the same rotation direction. The bit chip bodies 1 with flexible insulating sheets 2 are stacked in a staggered manner to form a spiral current channel. Finally, the bit chip body 1 and the flexible insulating sheet 2 are locked and fixed by the fixing rod passing through the first fixing hole 12 and the second fixing hole 22 to form a water-cooled magnet coil.

[0033] In this embodiment, in the friction pair between the bit chip body 1 and the flexible insulating sheet 2, by setting the groove 104 on the bit chip body 1, under the electromagnetic force generated by the operation of the water-cooled magnet coil, the flexible insulating sheet 2 with a small elastic modulus will deform in the upper mounting area 102 and the lower mounting area 103 and embed into the groove 104, thereby increasing the contact area between the two, thereby increasing the friction coefficient of the friction pair between the bit chip body 1 and the flexible insulating sheet 2, and thus enhancing the ability of the water-cooled magnet coil to resist the unbalanced electromagnetic force between the bit chips.

[0034] In addition, there are contact surfaces between the bit chip body 1 and the flexible insulating sheet 2. Each contact surface generates pressure under electromagnetic force, which in turn increases the friction between the bit chip body 1 and the flexible insulating sheet 2. Since the water-cooled magnet coil is formed by stacking multiple bit chip bodies 1 and flexible insulating sheets 2, the friction between the bit chip body 1 and the flexible insulating sheet 2 in the entire water-cooled magnet coil is superimposed. The overall friction is much greater than the sum of the friction between a single bit chip body 1 and the flexible insulating sheet 2, which further enhances the ability of the water-cooled magnet coil to resist unbalanced electromagnetic forces between the bit chips.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] The above embodiments are merely examples of implementation methods of the invention. The scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A novel bit sheet structure for water-cooled magnets, characterized in that: It includes a ring-shaped bit chip body and a fan-shaped flexible insulating sheet; A slit is made along the radial direction of the bit chip body, making the bit chip body open. An upper mounting area and a lower mounting area for pressing flexible insulating sheets are respectively provided on the bit chip body at both ends of the slit. The upper mounting area and the lower mounting area are arranged diagonally along the slit. Multiple grooves are provided on the bit chip body in both the upper and lower mounting areas. When the water-cooled magnet coil is working, the flexible insulating sheet deforms in the upper and lower mounting areas and is embedded in the grooves.

2. The bit sheet structure for a novel water-cooled magnet according to claim 1, characterized in that: Each bit chip body is provided with multiple first cooling holes and first fixing holes, with at least one first fixing hole provided in the upper mounting area and the lower mounting area respectively.

3. The bit sheet structure for a novel water-cooled magnet according to claim 2, characterized in that: The flexible insulating sheet is provided with a second cooling hole and a second fixing hole corresponding to the positions of the first cooling hole and the first fixing hole.

4. The bit sheet structure for a novel water-cooled magnet according to claim 1, characterized in that: The flexible insulating sheet is made of polyimide rubber with insulating properties.

5. The bit sheet structure for a novel water-cooled magnet according to claim 1, characterized in that: The groove is a U-shaped groove.

6. The bit sheet structure for a novel water-cooled magnet according to claim 5, characterized in that: The groove is 5-15 micrometers long and 5-15 micrometers deep.

7. The bit sheet structure for a novel water-cooled magnet according to claim 1, characterized in that: The groove is a V-shaped groove.

8. The bit sheet structure for a novel water-cooled magnet according to claim 7, characterized in that: The groove is 5-15 micrometers long and 5-15 micrometers deep.

9. The bit sheet structure for a novel water-cooled magnet according to claim 1, characterized in that: The grooves are formed by laser processing or chemical etching.

10. An insulating mounting method using the bit sheet structure for a novel water-cooled magnet as described in any one of claims 1 to 9, characterized in that: Includes the following steps: Place the first flexible insulating sheet on the upper mounting area of ​​the first bit chip body; then rotate the flexible insulating sheet by an angle to place the second bit chip body, and press the lower mounting area of ​​the second bit chip body against the top surface of the first flexible insulating sheet. Repeat the above steps and stack them sequentially along the same rotation direction of the flexible insulating sheet, and stack the bit chip bodies with flexible insulating sheets in a staggered manner to form a spiral upward current channel.

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