Ultra-high magnetic field circuit

Abstract

The invention discloses a magnetic circuit for ultra-high magnetic field, comprising a first layer of magnetic steel and a second layer of magnetic steel, wherein the two layers of magnetic steel constitute a first magnetization module, wherein the first layer of magnetic steel and the second layer of magnetic steel are bonded and connected, wherein the structures, sizes and magnetization directions of the first layer of magnetic steel and the second layer of magnetic steel are completely the same, and wherein a single layer of magnetic steel comprises nine magnetic steels distributed in a nine-square grid array, wherein the magnetization direction of the single layer of magnetic steel is such that, except for a middle magnetic steel extending horizontally in a direction away from the magnetic steel, the rest of the magnetic steels radiate from the center to the surrounding areas, and in addition, a variety of schemes are designed by improving the magnetization direction and installing a magnetic yoke; the invention concentrates most of the magnetic field on the middle magnetic steel to form a circuit; the magnetic assembly composed of the first layer and the second layer of magnetic steel alone can obtain a very high magnetic field on one plane of a magnetic block and form a circuit through the air; the two schemes for installing a magnetic yoke further improve the magnetic field strength of the magnetic circuit, which can be used not only for ion deviation but also for magnetizing the magnetic steel, and can replace the magnetizer on the existing market.

Description

Technical Field

[0001] The invention relates to the field of magnetic products, in particular to a magnetic circuit for ultra-high magnetic fields. Background Art

[0002] Generally, the magnetic field strength of a combination of magnetic steels is considered high-strength magnetism when it reaches 1.6 Tesla. It is difficult for ordinary magnets and their arrangements to reach a magnetic field exceeding 2.0 Tesla. For example, if ions deviate from the magnetic field, an ultra-high magnetic field is required to achieve an ultra-high magnetic field within a specific range. In a normal magnetic circuit, an electromagnetic field is required to achieve a magnetic field strength of more than 2.0 Tesla. Therefore, the volume is very large and relatively bulky, and a more convenient magnetic circuit is required. However, only permanent magnets are used. On the one hand, the number, shape, and magnetization direction of the permanent magnets require specific design and repeated verification. On the other hand, ordinary performance permanent magnets cannot meet the requirements of forming an ultra-high magnetic field magnetic circuit. The existing technology cannot use only permanent magnets to meet the industrial use requirements. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an ultra-high magnetic field magnetic circuit that uses permanent magnets to achieve a strong magnetic field greater than 2.0 Tesla in response to the problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a super-high magnetic field magnetic circuit includes a first layer of magnetic steel and a second layer of magnetic steel, the two layers of magnetic steel constitute a first magnetization module, the first layer of magnetic steel and the second layer of magnetic steel are bonded and connected, the structure, size and magnetization direction of the first layer of magnetic steel and the second layer of magnetic steel are completely the same, the single layer of magnetic steel includes nine magnetic steels distributed in a nine-square grid array, the single magnetic steels are all rectangular parallelepipeds, adjacent magnetic steels are bonded and connected, the vertical section of the single layer of magnetic steel is a square with a side length of m, and the single The layer of magnetic steel is composed of three specifications of magnetic steel. The four magnetic steels at the four corners of the square have the same shape and size, which are corner magnetic steels. The vertical section of the corner magnetic steel is a square with a side length of a. The magnetic steels arranged in the cross direction are edge center magnetic steels except for the middle magnetic steel. The edge center magnetic steels have the same shape and size. The edge length of the outer contour of the vertical section of the single-layer magnetic steel composed of the edge center magnetic steel is b. The vertical section of the middle magnetic steel in the center is a square with a side length of b. The numerical relationship of each length satisfies that b is less than a, and 2a+b=m;

[0005] The magnetization direction is S pointing to N. The magnetization direction of the single-layer magnetic steel is that the physical center of the middle magnetic steel in each vertical section of the single-layer magnetic steel is regarded as the origin. The magnetization direction of the middle magnetic steel is horizontally extending away from the magnetic steel. The magnetization direction of the corner magnetic steel is from the vertex of the outer contour square to the origin. The magnetization direction of the edge center magnetic steel is from the midpoint of each side of the outer contour square to the origin. The magnetization directions of each vertical section of the first layer of magnetic steel and the second layer of magnetic steel are the same.

[0006] Furthermore, the vertical cross-sectional side length m of the first layer of magnetic steel and the second layer of magnetic steel is 80 cm, a is 32.5 cm, b is 15 cm, and the thickness of the single layer of magnetic steel is 35 cm.

[0007] Furthermore, all magnets are saturated magnetized, and the magnet materials are all high-performance and high-coercive force neodymium iron boron magnets. Here, high performance refers to the residual magnetization intensity greater than 1.28 Tesla, and high coercive force refers to the intrinsic coercive force greater than or equal to 2400 kA / m.

[0008] Furthermore, the magnetization directions of the first layer of magnetic steel are different, and the magnetization directions of each magnetic steel constituting the first layer of magnetic steel are the same, and are all horizontally directed toward the second layer of magnetic steel.

[0009] Further, a second magnetizing module is provided corresponding to the first magnetizing module, the second magnetizing module and the first magnetizing module have the same structure and size, the second magnetizing module includes a third layer of magnetic steel and a fourth layer of magnetic steel, the four layers of magnetic steel are horizontally arranged in the order of a first layer of magnetic steel, a second layer of magnetic steel, a third layer of magnetic steel and a fourth layer of magnetic steel, the first magnetizing module and the second magnetizing module are respectively bonded and fixed on the inner side of a symmetrical U-shaped magnetic yoke on the opposite side, the shape of the magnetic yoke is specifically three integrally formed rectangular parallelepipeds connected and enclosed, the rectangle in the middle is a middle section magnetic yoke, and the second magnetizing module is at the same distance from the first magnetizing module and the middle section magnetic yoke;

[0010] The third layer of magnetic steel and the fourth layer of magnetic steel have the same magnetization direction, the magnetization direction of the middle magnetic steel of the third layer of magnetic steel and the fourth layer of magnetic steel is the same as the magnetization direction of the first layer of magnetic steel, the magnetization direction of the corner magnetic steel of the third layer of magnetic steel and the fourth layer of magnetic steel is from the origin to the vertex of the outer contour square, the magnetization direction of the side center magnetic steel of the third layer of magnetic steel and the fourth layer of magnetic steel is from the origin to the midpoint of each side of the outer contour square, and the magnetization direction of each vertical section of the third layer of magnetic steel and the fourth layer of magnetic steel is the same.

[0011] Furthermore, the magnetization direction of the fourth layer of magnetic steel is different, and the magnetization direction of each magnetic steel constituting the fourth layer of magnetic steel is the same, and all are horizontally pointed in the opposite direction of the third layer of magnetic steel.

[0012] Furthermore, the magnetic yoke is made of electrical pure iron.

[0013] Compared with the prior art, the ultra-high magnetic field magnetic circuit of the present invention is designed with a special arrangement of magnetic steel and magnetization arrangement direction, which reduces costs while meeting high performance requirements. High-performance and high internal coercive force magnetic steel is selected to concentrate most of the magnetic field on the middle magnetic steel to form a circuit. The magnetic component composed of the first and second layers of magnetic steel alone can obtain a very high magnetic field on one plane of a magnetic block, reaching a magnetic field strength of 1.9-2.0 Tesla; the two schemes for installing the magnetic yoke utilize the good electromagnetic properties of electrical pure iron to further improve the magnetic field strength of the magnetic circuit, and generate a magnetic field of more than 2.0 Tesla in the middle gap of the circuit, which can not only be used for ion deflection, but also for magnetizing the magnetic steel, with excellent performance and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of embodiment 1 of the present invention.

[0015] Figure 2 It is a front view and a schematic diagram of the magnetization direction of the first layer of magnetic steel and the second layer of magnetic steel in Example 1 of the present invention.

[0016] Figure 3 Schematic diagram of the magnetic circuit direction of Example 1 of the present invention.

[0017] Figure 4 It is a stereoscopic schematic diagram of embodiment 2 of the present invention.

[0018] Figure 5 It is a front view and a schematic diagram of the magnetization direction of the first layer of magnetic steel and the second layer of magnetic steel in Example 2 of the present invention.

[0019] Figure 6 It is a three-dimensional schematic diagram of embodiment 3 of the present invention.

[0020] Figure 7 It is a three-dimensional schematic diagram of each layer of magnetic steel and its magnetization direction in Example 3 of the present invention.

[0021] Figure 8 It is a front view and a schematic diagram of the magnetization direction of each layer of magnetic steel in Example 3 of the present invention.

[0022] Fig. 9 Schematic diagram of the magnetic circuit direction of Example 3 of the present invention.

[0023] Fig.10 It is a three-dimensional schematic diagram of each layer of magnetic steel and its magnetization direction in Example 4 of the present invention.

[0024] Fig.11 It is a front view and a schematic diagram of the magnetization direction of each layer of magnetic steel in Example 4 of the present invention.

[0025] Reference numerals:

[0026] 1-first magnetization module; 11-first layer of magnetic steel; 12-second layer of magnetic steel;

[0027] 2-second magnetization module; 21-third layer of magnetic steel; 22-fourth layer of magnetic steel;

[0028] 3-corner magnet; 4-center magnet; 5-middle magnet;

[0029] 6-magnetic yoke; 61-middle magnetic yoke; DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] like Figures 1 to 3 As shown, the ultra-high magnetic field magnetic circuit includes a first layer of magnetic steel 11 and a second layer of magnetic steel 12, the two layers of magnetic steel constitute a first magnetization module 1, the first layer of magnetic steel 11 and the second layer of magnetic steel 12 are bonded and connected, the structure, size and magnetization direction of the two layers of magnetic steel are exactly the same, the single layer of magnetic steel includes nine magnetic steels distributed in a nine-square grid array, the single magnetic steel is a rectangular parallelepiped, the adjacent magnetic steels are bonded and connected, the vertical section of the single layer of magnetic steel is a square, and the side length is m, the single layer of magnetic steel is composed of three specifications of magnetic steel, the four magnetic steels at the four corners are the same in shape and size, and are corner magnetic steels 3, the vertical section is a square, the side length is a, and the cross The magnets arranged in the direction except the middle one are the side center magnets 4 with the same shape and size. The edge length of the outer contour of the vertical section of the single-layer magnet composed of the side center magnets 4 is b. The vertical section of the middle magnet 5 in the center is a square with a side length of b. The numerical relationship of each length satisfies that b is less than a, 2a+b=m. In this embodiment, the side length m of the vertical section of the single-layer magnet is 80 cm, a is 32.5 cm, b is 15 cm, and the thickness of the single-layer magnet is 35 cm. The difference in size between the magnets is mainly to reduce the area of ​​the magnetic field passing through the middle magnet 5 and enhance the magnetic field strength of each section of the middle magnet 5.

[0033] All magnets are saturated magnetized, and the magnet materials are all high-performance and high-coercive force NdFeB magnets. Here, high performance specifically refers to Br (residual magnetization intensity) greater than 1.28 Tesla, and high coercive force specifically refers to the intrinsic coercive force greater than or equal to 2400KA / m. KA / m is kiloamperes per meter, which is the unit of magnetic field intensity. The intrinsic coercive force means the reverse magnetic field intensity applied when the sum of the microscopic magnetic dipole moment vector inside the magnet is reduced to 0.

[0034] like Figure 2As shown, the projection in the direction A is the main view, the arrow represents the magnetization direction, the magnetization direction is S to N, the magnetization direction of the single-layer magnetic steel is, the physical center of the middle magnetic steel 5 is regarded as the origin, the magnetization direction of the middle magnetic steel 5 is horizontally extended away from the magnetic steel, the magnetization direction of the corner magnetic steel 3 is from the vertex of the outer contour square to the origin, the magnetization direction of the edge center magnetic steel 4 is from the midpoint of each side of the outer contour square to the origin, the first layer of magnetic steel 11 and the second layer of magnetic steel 12 are the same in the magnetization direction of each section parallel to the main view, and the above-mentioned origin, vertex and midpoint of each side are all points on the plane where the main view is located.

[0035] like Figure 3 As shown, after the above-mentioned design of the magnetization direction, a loop is formed inside and outside the first magnetization module 1, especially the loop formed outside in the air. Because most of the magnetic field of the magnetic steel is squeezed onto the middle magnetic steel 5, the cross-sectional magnetic field of the middle magnetic steel 5 is very strong, and the magnetic field in the loop can reach a relatively uniform 1.9-2.0 Tesla. In some fields that need to create a magnetic field environment, two layers alone can meet the use requirements.

[0036] Example 2

[0037] like Figures 4 to 5 As shown, the difference between this embodiment and embodiment 1 is that the magnetization direction of the first layer of magnetic steel 11 is different. In this embodiment, the magnetization direction of each magnetic steel constituting the first layer of magnetic steel 11 is the same, and all are horizontally pointing to the second layer of magnetic steel 12; the external effects of embodiment 1 and embodiment 2 are similar, both of which bypass the air to form a loop, and the magnetic field strength is equivalent, which can meet the use scenarios of ion deviation that do not require very high magnetic field loop strength.

[0038] Example 3

[0039] like Figures 6 to 9 As shown, the difference between this embodiment and embodiment 1 is that a second magnetizing module 2 is provided corresponding to the first magnetizing module 1, and the second magnetizing module 2 has the same structure and size as the first magnetizing module 1. The second magnetizing module 2 includes a third layer of magnetic steel 21 and a fourth layer of magnetic steel 22. The horizontal arrangement of the four layers of magnetic steel is, in order, a first layer of magnetic steel 11, a second layer of magnetic steel 12, a third layer of magnetic steel 21 and a fourth layer of magnetic steel 22. The first magnetizing module 1 and the second magnetizing module 2 are respectively bonded and fixed on the inner side of a symmetrical U-shaped magnetic yoke 6 on the opposite sides thereof. The shape of the magnetic yoke 6 is specifically three integrally formed rectangular parallelepipeds connected and enclosed, and the rectangle in the middle is a middle section magnetic yoke 61. The second magnetizing module 2 is arranged at the same height as the first magnetizing module 1 and is at the same distance from the middle section magnetic yoke 61. The magnetic yoke 6 itself does not produce a magnetic field and only plays a role in transmitting magnetic lines of force in the magnetic circuit, but can constrain the magnetic lines of force to scatter outward, which is more conducive to forming a closed magnetic circuit. In this embodiment, the magnetic yoke 6 is made of electrical pure iron.

[0040] like Figure 8 As shown, the second magnetizing module 2 is arranged corresponding to the magnetizing direction of the first magnetizing module 1, and the magnetizing directions of the third layer of magnetic steel 21 and the fourth layer of magnetic steel 22 are the same. Taking the third layer of magnetic steel 21 as an example, with the A-direction projection as the main view, the magnetizing direction of the middle magnetic steel 5 of the third layer of magnetic steel 21 is the same as the magnetizing direction of the first layer of magnetic steel 11, the magnetizing direction of the corner magnetic steel 3 of the third layer of magnetic steel 21 is from the origin to the vertex of the outer contour square, and the magnetizing direction of the side center magnetic steel 4 of the third layer of magnetic steel 21 is from the origin to the midpoint of each side of the outer contour square, that is, except that the magnetizing direction of the middle magnetic steel 5 of the third layer of magnetic steel 21 is the same as the middle magnetic steel 5 of the first layer of magnetic steel 11, the magnetizing directions of the remaining magnetic steels are opposite to the magnetizing directions of the magnetic steels at the corresponding positions of the first layer of magnetic steel 11, and the magnetizing directions of the sections of the third layer of magnetic steel and the fourth layer of magnetic steel 22 parallel to the main view are the same.

[0041] like Fig. 9 As shown, the magnetic field can be regarded as starting from the first layer of magnetic steel 11, passing through the second layer, the third layer of magnetic steel, and the fourth layer of magnetic steel in sequence, and then entering the first layer of magnetic steel 11 through the magnetic yoke 6, and repeatedly circulating the magnetic circuit direction; among them, the magnetic field at the gap between the first magnetization module 1 and the second magnetization is the strongest, and the surface magnetism at the two relative middle magnetic steels 5 can reach up to 2.3 Tesla, and the magnetic field strength at the gap can exceed 2.0 Tesla, meeting higher usage requirements.

[0042] Example 4

[0043] like Figure 10 to Figure 11 As shown, the difference between this embodiment and embodiment 3 is that the magnetization direction of the fourth layer of magnetic steel 22 is different. The magnetization direction of the fourth layer of magnetic steel 22 in this embodiment is the same as the magnetization direction of the first layer of magnetic steel 11 in embodiment 2, that is, the magnetization direction of each magnetic steel constituting the fourth layer of magnetic steel 22 is the same, and all are horizontally pointing in the opposite direction of the third layer of magnetic steel 21.

[0044] The overall magnetic circuit directions of Example 3 and Example 4 are the same, both of which concentrate the magnetic field of the surrounding magnetic steels to the middle magnetic steel 5, increase the magnetic field on the surface of the middle magnetic steel 5, and then form an ultra-high magnetic field on the end face of the magnetic steel; through the optimization of the magnetization direction of Example 4, the magnetic field strength at the middle magnetic steel 5 is further enhanced; the magnetic circuits of Example 3 and Example 4 can both be used for the deviation of ions from the magnetic field source, and in a normal magnetic circuit, an electromagnetic field must be used to achieve more than 2.0 Tesla, so the volume is very large. After many verifications, improvements and material selections, the magnetic field is specifically arranged, and electrical pure iron is used as the yoke 6, and finally a strong magnetic field greater than 2.0 Tesla is achieved at the gap through a permanent magnet solution, and the local point can reach 2.3 Tesla.

[0045] The present invention selects high-performance and high internal coercive force magnetic steel with excellent electromagnetic properties. By designing the cross-section of the middle magnetic steel 5 to be the smallest among the magnetic steels, most of the magnetic field is concentrated on the middle magnetic steel to form a loop. No power supply is required during operation, the energy consumption is small and the magnetic force is large, and a magnetic line loop can be formed for application in a variety of industrial scenarios. The magnetic component composed of the first and second layers of magnetic steel alone can obtain a very high magnetic field on one of the planes of a magnetic block and form a loop through the air. The two schemes for installing the magnetic yoke 6 utilize the good electromagnetic properties of electrical pure iron to further improve the magnetic field strength of the magnetic loop, and generate a magnetic field of more than 2.0 Tesla in the middle gap of the loop, which can not only be used for ion deviation, but also for magnetizing the magnetic steel. It has been verified that the 2.0 Tesla magnetic field can completely saturate magnetize low-performance NdFeB magnets and permanent magnets such as ferrites, replacing the existing magnetizers on the market, with excellent performance and convenient use.

[0046] Finally, it should be noted that the above embodiments only illustrate the technical solutions of the present invention, rather than limiting it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic circuit for ultra-high magnetic field, characterized by: The invention comprises a first layer of magnetic steel (11) and a second layer of magnetic steel (12), wherein the two layers of magnetic steel form a first magnetization module (1), wherein the first layer of magnetic steel (11) and the second layer of magnetic steel (12) are bonded and connected, wherein the structure, size and magnetization direction of the first layer of magnetic steel (11) and the second layer of magnetic steel (12) are completely the same, wherein the single layer of magnetic steel comprises nine magnetic steels distributed in a nine-square grid array, wherein each of the single magnetic steels is a rectangular parallelepiped, wherein adjacent magnetic steels are bonded and connected, wherein the vertical section of the single layer of magnetic steel is a square with a side length of m, and wherein the single layer of magnetic steel comprises three types of magnetic steels: The four magnets at the four corners of the square are of the same shape and size, and are corner magnets (3). The vertical section of the corner magnets (3) is a square with a side length of a. The magnets arranged in the cross direction, except for the middle magnet, are edge center magnets (4). The edge center magnets (4) are of the same shape and size. The edge length of the outer contour of the vertical section of the single-layer magnet formed by the edge center magnets (4) is b. The vertical section of the middle magnet (5) at the center is a square with a side length of b. The numerical relationship of each length satisfies that b is less than a, and 2a+b=m. The magnetization direction is S pointing to N, the magnetization direction of the single-layer magnetic steel is to regard the physical center of the middle magnetic steel (5) in each vertical section of the single-layer magnetic steel as the origin, the magnetization direction of the middle magnetic steel (5) is to extend horizontally away from the magnetic steel, the magnetization direction of the corner magnetic steel (3) is from the vertex of the outer contour square to the origin, and the magnetization direction of the edge center magnetic steel (4) is from the midpoint of each side of the outer contour square to the origin.

2. The ultra-high magnetic field magnetic circuit according to claim 1, characterized in that: The vertical cross-sectional side length m of the first layer of magnetic steel (11) and the second layer of magnetic steel (12) is 80 cm, a is 32.5 cm, b is 15 cm, and the thickness of the single layer of magnetic steel is 35 cm.

3. The ultra-high magnetic field magnetic circuit according to claim 1, characterized in that: All magnets are saturated magnetized, and the magnet materials are all high-performance and high-coercivity NdFeB magnets. Here, high performance means the residual magnetization intensity is greater than 1.28 Tesla, and high coercivity means the intrinsic coercivity is greater than or equal to 2400 kA / m.

4. The ultra-high magnetic field magnetic circuit according to claim 1, characterized in that: A second magnetizing module (2) is provided corresponding to the first magnetizing module (1); the second magnetizing module (2) and the first magnetizing module (1) have the same structure and size; the second magnetizing module (2) comprises a third layer of magnetic steel (21) and a fourth layer of magnetic steel (22); the four layers of magnetic steel are horizontally arranged in the order of a first layer of magnetic steel (11), a second layer of magnetic steel (12), a third layer of magnetic steel (21) and a fourth layer of magnetic steel (22); the first magnetizing module (1) and the second magnetizing module (2) are respectively bonded and fixed on the inner side of a symmetrical U-shaped magnetic yoke (6) on the opposite sides thereof; the magnetic yoke (6) is specifically shaped as three integrally formed rectangular parallelepipeds connected and enclosed; the rectangular parallelepiped in the middle is a middle section magnetic yoke (61); the second magnetizing module (2) and the first magnetizing module (1) are at the same distance from the middle section magnetic yoke (61); The magnetization direction of the intermediate magnetic steel (5) of the third layer of magnetic steel (21) and the fourth layer of magnetic steel (22) is the same as the magnetization direction of the first layer of magnetic steel (11), and the magnetization directions of the vertical sections of the third layer of magnetic steel (21) and the fourth layer of magnetic steel (22) are the same.

5. The ultra-high magnetic field magnetic circuit according to claim 4, characterized in that: The magnetic yoke (6) is made of electrical pure iron.

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