阅读说明：本技术 一种水冷电磁铁 (Water-cooling electromagnet ) 是由 郑勇 李�远 石勇 尹腾飞 吴克常 王岳彬 丁岩 于 2021-07-23 设计创作，主要内容包括：本发明公开了一种水冷电磁铁,包括磁轭和两个对称设置的磁极,所述磁轭为矩形中空结构,所述磁轭套设在两个所述磁极外侧,两个所述磁极均由矩形段一、矩形段二连接而成,所述矩形段二上均套设有线圈,两个所述线圈串联,两个所述线圈外部均套设有冷却盘管,所述冷却盘管、线圈和磁极由外壳紧密包裹后形成一体,所述外壳与所述磁轭固定连接。本发明的水冷电磁铁通过线圈左右串联,左右磁极底面相互平行布置,在气隙内形成了所需的匀强磁场；冷却盘管的设计可以快速带走线圈工作时产生的热量,降低了温度对磁场的影响,提高了线圈持续工作时磁场的均匀度。(The invention discloses a water-cooling electromagnet which comprises a magnetic yoke and two magnetic poles which are symmetrically arranged, wherein the magnetic yoke is of a rectangular hollow structure, the magnetic yoke is sleeved on the outer sides of the two magnetic poles, the two magnetic poles are formed by connecting a rectangular section I and a rectangular section II, coils are sleeved on the rectangular section II, the two coils are connected in series, cooling coils are sleeved outside the two coils, the cooling coils, the coils and the magnetic poles are tightly wrapped by a shell to form a whole, and the shell is fixedly connected with the magnetic yoke. The water-cooled electromagnet is connected in series from left to right through the coil, the bottom surfaces of the left magnetic pole and the right magnetic pole are arranged in parallel, and a required uniform magnetic field is formed in an air gap; the design of the cooling coil can quickly take away heat generated by the coil during working, reduce the influence of temperature on the magnetic field and improve the uniformity of the magnetic field when the coil continuously works.)

1. The water-cooling electromagnet is characterized by comprising a magnet yoke (1) and two magnetic poles (2) which are symmetrically arranged, wherein the magnet yoke (1) is of a rectangular hollow structure, the magnet yoke (1) is sleeved on the outer sides of the two magnetic poles (2), the two magnetic poles (2) are formed by connecting a rectangular section I (2-1) and a rectangular section II (2-2), coils (3) are sleeved on the rectangular section II (2-2), the two coils (3) are connected in series, cooling coils (4) are sleeved on the outer parts of the two coils (3), the cooling coils (4), the coils (3) and the magnetic poles (2) are tightly wrapped by a shell (5) to form a whole, and the shell (5) is fixedly connected with the magnet yoke (1);

a hose connector (4-1) is arranged on the cooling coil (4), one end of the hose connector (4-1) is connected with the cooling coil (4) in a welding manner, and the other end of the hose connector (4-1) penetrates through the shell (5);

threaded holes (2-3) are formed in the top surfaces (2-4) of the two magnetic poles (2), and the bottom surfaces (2-5) of the two magnetic poles (2) are parallel to each other;

the magnetic yoke is characterized in that two sides of the magnetic yoke (1) are respectively provided with a countersunk hole (1-1) and a wire outlet hole (1-2), the countersunk hole (1-1) is located below the wire outlet hole (1-2), a junction box (6) is welded at the wire outlet hole (1-2) of the magnetic yoke (1), and a power supply cable extends into the junction box (6) and is connected with the coil (3).

2. The water-cooled electromagnet as recited in claim 1, characterized in that the hose connector (4-1) is a hollow cylinder, and the outer surface of the hose connector (4-1) is provided with a groove.

3. The water-cooled electromagnet as recited in claim 1, characterized in that the outer dimension of the rectangular section one (2-1) is larger than that of the rectangular section two (2-2).

4. The water-cooled electromagnet according to claim 1, characterized in that the poles (2), coils (3), cooling coils (4), housing (5) and junction box (6) are all arranged symmetrically with respect to the center plane of the yoke (1).

5. The water-cooled electromagnet according to claim 1, characterized in that the magnetic poles (2), the coils (3), the cooling coil (4) and the housing (5) are mounted on the magnet yoke (1) by bolts.

Technical Field

The invention relates to the technical field of electromagnets, in particular to a water-cooling electromagnet.

Background

When a polarized neutron scattering method is used for researching the microstructure of a material, polarized neutrons need to be regulated, and the spin polarization of the neutrons can generate precession in an external magnetic field, which is called Larmor precession. Knowing the intensity of the external magnetic field and the precession time of the neutrons in the external magnetic field, the precession of the neutrons in the static magnetic field can be accurately calculated. The existence of Larmor precession enables the polarization of neutrons to be regulated through an external magnetic field in a polarized neutron experiment. The higher the uniformity of the external magnetic field is, the more accurate the precession calculation is, the smaller the experimental error is, and the poorer the uniformity of the external magnetic field in the prior art is.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a water-cooling electromagnet which can establish a high-precision uniform magnetic field for providing larmor precession of polarized neutrons between two magnetic poles, wherein the polarized neutron beams for experiments pass through the central region of the magnetic field, and the polarized neutrons are regulated and controlled by using an external magnetic field in the region.

In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:

a water-cooling electromagnet comprises a magnetic yoke and two magnetic poles which are symmetrically arranged, wherein the magnetic yoke is of a rectangular hollow structure, the magnetic yoke is sleeved on the outer sides of the two magnetic poles, the two magnetic poles are formed by connecting a rectangular section I and a rectangular section II, coils are sleeved on the rectangular section II, the two coils are connected in series, cooling coils are sleeved outside the two coils, the cooling coils, the coils and the magnetic poles are tightly wrapped by a shell to form a whole, and the shell is fixedly connected with the magnetic yoke;

a hose joint is arranged on the cooling coil, one end of the hose joint is welded with the cooling coil, and the other end of the hose joint penetrates through the shell;

threaded holes are formed in the top surfaces of the two magnetic poles, and the bottom surfaces of the two magnetic poles are parallel to each other;

the magnetic yoke is characterized in that countersunk holes and wire holes are formed in the two sides of the magnetic yoke, the countersunk holes are located below the wire holes, a junction box is welded at the wire holes of the magnetic yoke, and a power supply cable extends into the junction box and is connected with the coil.

Further, the hose connector is a hollow cylinder, and a groove is formed in the outer surface of the hose connector.

Further, the outer edge size of the first rectangular section is larger than that of the second rectangular section.

Further, the magnetic poles, the coils, the cooling coil, the housing, and the terminal block are all arranged symmetrically about a center plane of the yoke.

Further, the magnetic poles, the coils, the cooling coil and the shell are mounted on the magnetic yoke through bolts.

The invention has the beneficial effects that: the water-cooled electromagnet is connected in series from left to right through the coil, the bottom surfaces of the left magnetic pole and the right magnetic pole are arranged in parallel, and a required uniform magnetic field is formed in an air gap; the design of the cooling coil can quickly take away heat generated by the coil during working, reduce the influence of temperature on the magnetic field and improve the uniformity of the magnetic field when the coil continuously works.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is an exploded view of a water-cooled electromagnet according to the present invention;

FIG. 2 is a perspective view of a water-cooled electromagnet according to the present invention;

FIG. 3 is a perspective view of a magnetic yoke according to the present invention;

FIG. 4 is a perspective view of a magnetic pole of the present invention;

FIG. 5 is a perspective view of a cooling coil according to the present invention;

fig. 6 is a front view of the water-cooled electromagnet according to the present invention.

In the figure: 1. a magnetic yoke; 1-1, countersunk holes; 1-2, wire outlet holes; 2. a magnetic pole; 2-1, a first rectangular section; 2-2, a rectangular section II; 2-3, a threaded hole; 2-4, top surface; 2-5, bottom surface; 3. a coil; 4. a cooling coil; 4-1, hose connector; 5. a housing; 6. and (7) an outlet box.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

As shown in fig. 1-4, the water-cooled electromagnet according to the embodiment of the present invention includes a magnetic yoke 1 and two magnetic poles 2 symmetrically arranged, the magnetic yoke 1 is a fully enclosed rectangular hollow structure, the magnetic yoke 1 is sleeved outside the two magnetic poles 2, the two magnetic poles 2 are both rectangular two-section ladder structures and are formed by connecting a rectangular section one 2-1 and a rectangular section two 2-2, coils 3 are respectively sleeved on the rectangular section two 2-2, the two coils 3 are connected in series, a cooling coil 4 is respectively sleeved outside the two coils 3, the cooling coil 4, the coils 3 and the magnetic poles 2 are tightly wrapped by a housing 5 to form a whole, and the housing 5 is fixedly connected with the magnetic yoke 1;

as shown in fig. 5, a hose connector 4-1 is arranged on the cooling coil 4, one end of the hose connector 4-1 is connected to the cooling coil 4 by welding, and the other end of the hose connector 4-1 penetrates through the housing 5;

as shown in fig. 4 and 6, threaded holes 2-3 are respectively formed in the top surfaces 2-4 of the two magnetic poles 2, the bottom surfaces 2-5 of the two magnetic poles 2 are parallel to each other, the magnetic fields of the left and right bottom surfaces 2-5 are opposite in polarity after the coil 3 is electrified, and a required uniform magnetic field is formed in an air gap between the two bottom surfaces;

as shown in fig. 3 and 6, both sides of the magnetic yoke 1 are provided with a countersunk hole 1-1 and a wire outlet hole 1-2, the countersunk hole 1-1 is located below the wire outlet hole 1-2, a junction box 6 is welded at the wire outlet hole 1-2 of the magnetic yoke 1, and a power supply cable extends into the junction box 6 to be connected with the coil 3 to supply power to the coil 3.

The magnetic yoke 1 is made of a high-permeability soft magnetic material and is formed by assembling four plates; the magnetic pole 2 is made of a soft magnetic material with high magnetic permeability, the coil 3 is made of a copper wire and spirally wound on a second rectangular section 2-2 of the magnetic pole 2, the cooling coil 4 is formed by spirally winding a hollow flat copper tube, the shape of the hollow coil is consistent with that of the coil 3, the shell 5 is rectangular, and the shell is formed by pouring insulating glue through a die and then curing.

In one embodiment, the hose connector 4-1 is a hollow cylinder, and the outer surface of the hose connector 4-1 is provided with grooves to avoid slipping when connecting cooling water pipes.

In one embodiment, the outer dimension of the first rectangular segment 2-1 is greater than the second rectangular segment 2-2.

In a specific embodiment, the magnetic poles 2, the coils 3, the cooling coil 4, the housing 5 and the terminal block 6 are arranged in pairs on the left and right, symmetrically arranged about the central plane of the magnetic yoke 1.

In a specific embodiment, the magnetic pole 2, the coil 3, the cooling coil 4 and the housing 5 are mounted on the magnetic yoke 1 by bolts.

In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.

When an external current flows into the coil 3, the current-carrying straight conductor is held by the right hand and the thumb is pointed in the direction of the current in the straight conductor, as shown in fig. 6, the four fingers are pointed in the direction of the magnetic field around the current-carrying conductor, and the polarities of the magnetic fields on the left and right bottom surfaces 2 to 5 can be changed by adjusting the polarities of the series connection of the left and right coils 3, and in order to form a uniform magnetic field in the gap between the left and right magnetic poles 2, the polarities of the magnetic fields on the left and right bottom surfaces 2 to 5 must be reversed (the polarities of the magnetic fields are shown as "N" and "S" in fig. 6, and the arrows indicate the direction of the magnetic field vectors).

Coil 3 during operation can produce the heat, and its resistance can rise along with the rising of temperature, and whole structure also can generate thermal deformation under the effect of temperature simultaneously for 2 intervals of magnetic pole have slight change, and the fluctuation of 3 resistances of coil, 2 intervals of magnetic pole all can bring adverse effect to the degree of consistency in magnetic field, consequently must have efficient heat abstractor to cool off the electro-magnet. The cooling coil 4 is formed by spirally winding a hollow flat copper tube, the shape of the inner cavity of the cooling coil is consistent with the shape of the coil 3, the cooling coil is sleeved on the coil 3, a hose connector 4-1 is arranged on the cooling coil, cooling water is conveyed through an external water tube, the water tube is connected to the hose connector 4-1, the cooling water enters the cooling coil 4 through the hose connector 4-1, spirally flows in the cooling coil 4, and finally flows out of the other hose connector 4-1. The heat generated by the coil 3 is transferred to the cooling water through the outer wall of the cooling coil 4, and is circularly taken out of the electromagnet by the cooling water. In addition, the inner surface of the shell 5 is directly contacted with the cooling coil 4 and the coil 3, and the outer surface is exposed in the air, so that the auxiliary heat dissipation function can be realized. Air is not stored between the shell 5 and the coil 3 and between the shell and the cooling coil 4, so that the heat transfer efficiency is high, and the heat dissipation capacity of the electromagnet can be further improved.

In summary, with the above technical solution of the present invention, the water-cooled electromagnet of the present invention can establish a high-precision uniform magnetic field providing larmor precession of polarized neutrons between two magnetic poles, and the polarized neutron beam for experiment passes through the central region of the magnetic field, and is regulated and controlled by the external magnetic field in the central region; the cooling coil is hollow inside, can let in recirculated cooling water, takes away the heat that it produced at the coil during operation, prevents that the coil from overheated, can improve the degree of consistency in the magnetic field when the electro-magnet lasts the work.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.