Electromagnetic ammunition feeding device and ammunition feeding assembly thereof

Abstract

The invention discloses an electromagnetic ammunition supply device and an ammunition supply assembly thereof, relates to the field of electromagnetic launchers, and aims to improve the ammunition supply speed and reliability and reduce the ammunition supply energy consumption. On the basis of the bullet loading assembly and the bullet supply assembly, the bullet supply assembly is provided with the shielding coil, the shielding coil wraps the bullet supply assembly, and the shielding coil acts on the magnetic field of the position of the second bullet adjacent to the first bullet and counteracts the magnetic field acting on the position of the electromagnetic coil of the bullet loading assembly. According to the invention, the reverse acting force during bullet loading can be reduced, and the bullet supply reliability is improved.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic launchers, in particular to an electromagnetic ammunition feeding device and an ammunition feeding component thereof. Background Art

[0002] The electromagnetic launcher generates an electromagnetic field to drive the electromagnet (usually called a projectile) to move, and the electromagnetic feeder is a facility that loads the projectile into the acceleration section (i.e., the barrel) in preparation for firing, similar to loading a gun. In most application scenarios, the electromagnetic launcher requires an electromagnetic feeder for continuous loading, i.e., the electromagnetic feeder usually contains multiple projectiles. After the current projectile is fired, the electromagnetic feeder will load the next projectile to be fired into the acceleration section.

[0003] As a method that is easy to think of in the industry, the electromagnetic feeding device includes an electromagnetic coil and a magazine. The magazine contains the projectiles to be loaded. The magazine and the electromagnetic coil must be set close to each other so that the projectiles can obtain sufficient feeding force. The magazine successively prepares the projectiles to be fired from the loading position of the cavity close to the electromagnetic coil. When the projectile is at this position, the projectile is coaxial with the inner cavity of the electromagnetic coil. The magnetic field generated by the electromagnetic coil can accelerate the projectile at this position, and enter the acceleration section after passing through the inner cavity of the electromagnetic coil. The core structure of the electromagnetic feeding device is as follows: Figure 1 shown.

[0004] The above-mentioned electromagnetic feeding device can provide sufficient feeding force for loading projectiles. However, it is also under the action of the magnetic field of the electromagnetic coil that the projectile at the loading position will be affected by the magnetic attraction force of its adjacent projectiles, causing it to stick together with the adjacent projectiles. When preparing to load the projectile, the friction force on the projectile at the loading position or the magnetic attraction force opposite to the loading direction will be increased, causing the projectile to be subjected to a larger force that is unfavorable for loading. The feeding force of the electromagnetic coil needs to overcome a larger external force to accelerate the projectile, which increases the energy consumption of feeding and affects the reliability and speed of feeding. In severe cases, it may even cause jamming. Summary of the invention

[0005] The object of the present invention is to provide an electromagnetic ammunition feeding device to improve the ammunition feeding speed and reliability and reduce the energy consumption of ammunition feeding in order to solve all or part of the above-mentioned problems.

[0006] The technical solution adopted by the present invention is as follows:

[0007] An electromagnetic feeding device comprises a loading assembly and a feeding assembly, wherein the feeding assembly prepares a first projectile having ferromagnetism to a loading position; the loading assembly forms a loading channel, and the first projectile at the loading position is coaxial with the loading channel; the loading assembly drives the first projectile to accelerate on the loading channel through a magnetic field generated by an electromagnetic coil;

[0008] A shielding coil is arranged around the bullet feeding assembly, and the magnetic field of the shielding coil acting on the second projectile position adjacent to the first projectile is offset by the magnetic field of the electromagnetic coil acting on this position.

[0009] Optionally, the electromagnetic coil includes a first coil adjacent to the loading position, and the inner cavity of the first coil forms the end of the loading channel; the magnetic field applied by the shielding coil to the second projectile position offsets the magnetic field applied by the first coil to this position.

[0010] Optionally, a current direction of the shielding coil is opposite to a current direction of the first coil.

[0011] Optionally, the shielding coil is arranged within the range of the positions from the second projectile to the third projectile, and the third projectile is adjacent to the second projectile.

[0012] Optionally, the ammunition feeding assembly prepares the first projectile to a loading position from the side or axial direction of the ammunition feeding channel.

[0013] In order to solve the above problems, the present invention further provides a feeding assembly, which is used to prepare a first projectile with ferromagnetism to a loading position, so that the loading assembly of the electromagnetic feeding device can accelerate the first projectile on the loading channel through the magnetic field generated by the electromagnetic coil; it is characterized in that:

[0014] A shielding coil is wrapped around the bullet feeding assembly. When the bullet feeding assembly is assembled on the electromagnetic bullet feeding device, the shielding coil acts on the magnetic field of the second projectile position adjacent to the first projectile, which offsets the magnetic field of the electromagnetic coil acting on this position.

[0015] Optionally, the electromagnetic coil includes a first coil adjacent to the loading position, and the inner cavity of the first coil forms the end of the loading channel; when the feeding assembly is assembled on the electromagnetic feeding device, the magnetic field applied by the shielding coil to the second projectile position offsets the magnetic field applied by the first coil to this position.

[0016] Optionally, a current direction of the shielding coil is opposite to a current direction of the first coil.

[0017] Optionally, the shielding coil is arranged within the range of the positions from the second projectile to the third projectile, and the third projectile is adjacent to the second projectile.

[0018] Optionally, the ammunition feeding assembly prepares the first projectile to a loading position from the side or axial direction of the ammunition feeding channel.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0020] The electromagnetic feeding device of the present invention generates a magnetic field in the opposite direction to the magnetic field of the electromagnetic coil by arranging a shielding coil on the feeding assembly to reduce the magnetic attraction of the adjacent projectiles on the projectile at the loading position, thereby reducing the reverse force (friction or magnetic attraction) during loading, reducing the influence of external forces that are unfavorable to loading on loading, and under the action of the same electromagnetic coil magnetic field, the acceleration of the projectile at the loading position is greater and more stable, thereby improving the loading efficiency, improving the reliability of feeding, reducing the energy consumption of loading, and avoiding the phenomenon of jamming caused by unfavorable external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0022] Figure 1 It is the core structural diagram of the existing electromagnetic ammunition feeding device.

[0023] Figure 2 It is the coordinate and direction diagram agreed upon in the embodiments of this application.

[0024] Figure 3 yes Figure 1 A diagram showing the relationship between the forces acting on the first to third projectiles and the distance travelled by the first projectile.

[0025] Figure 4 yes Figure 1 The magnetic induction intensity distribution diagram of the first projectile at different positions.

[0026] Figure 5 yes Figure 1 Contact pressure force diagram between the projectiles.

[0027] Figure 6 It is a structural diagram of an embodiment of an electromagnetic ammunition feeding device adopting side-feeding.

[0028] Figure 7 yes Figure 6 Magnetic induction intensity distribution diagram in the embodiment structure.

[0029] Figure 8 yes Figure 6 A diagram showing the relationship between the forces acting on the first to third projectiles and the distance travelled by the first projectile in the embodiment.

[0030] Fig. 9 It is a structural diagram of an embodiment of an electromagnetic ammunition feeding device adopting axial ammunition feeding.

[0031] Fig.10 yes Fig. 9 Magnetic induction intensity distribution diagram in the embodiment.

[0032] Fig.11 yes Fig. 9A diagram showing the relationship between the axial force on each projectile and the travel distance of the first projectile in the embodiment.

[0033] Fig.12 yes Fig. 9 Structural diagram of an electromagnetic ammunition feeding device with a shielding coil added based on the embodiment.

[0034] Fig.13 yes Fig.12 Magnetic induction intensity distribution diagram in the embodiment.

[0035] Fig.14 yes Fig.13 A diagram showing the relationship between the axial force on each projectile and the travel distance of the first projectile in the embodiment.

[0036] In the figure, 1 is the first projectile, 2 is the second projectile, 3 is the third projectile, 4 is the first coil, and 5 is the shielding coil. DETAILED DESCRIPTION

[0037] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0038] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0039] like Figure 1 The figure shows the core structure of a typical electromagnetic feeding device in the prior art, including an electromagnetic coil and a magazine. The magazine is used to accommodate projectiles. The projectiles are ferromagnetic. The magazine is arranged closely to the electromagnetic coil. The magazine is provided with an opening on one side close to the electromagnetic coil. When the projectile is at the opening, it is in the loading position. The magnetic field generated by the electromagnetic coil can make the projectile at the loading position obtain an initial velocity from a stationary state, so that the projectile passes through the opening and enters the inner cavity of the electromagnetic coil to be loaded into the acceleration section. The acceleration section is responsible for accelerating the projectile along the barrel for firing.

[0040] This structure places the projectile and the electromagnetic coil close to each other, which can obtain sufficient feeding force to drive the projectile to accelerate. However, in addition to the feeding force, the projectile is also subjected to a large magnetic attraction force from the adjacent projectiles, thereby increasing the friction force or reverse magnetic attraction force from the adjacent projectiles during the loading process, which seriously affects the speed and reliability of projectile feeding.

[0041] For the sake of convenience, the embodiments of this application agree on various directions such as up, down, left and right. The direction toward the launch outlet is the front, and the direction away from the outlet is the back. According to the posture of the device when it is in normal use, the up and down are determined by the direction of gravity. The left and right when "facing forward and head up" are left and right. In the rectangular coordinate system, the positive direction of the z axis is the front, the positive direction of the x axis is the top, and the positive direction of the y axis is the right, such as Figure 2 shown.

[0042] by Figure 1 Based on the embodiment, the origin is defined at the center point of the rear surface of the electromagnetic coil. There are 5 projectiles in the ammunition feeding assembly, which are arranged in the order of the first projectile 1, the second projectile 2, the third projectile 3... according to the arrangement in the conventional magazine. The projectile at the front end of the magazine is called the first projectile 1, and so on. The first projectile moves in the z direction, with the positive direction of the z axis as the front. The other projectiles are stationary. The size of the projectile is Φ8*20mm, and the material is 10 steel. The initial spacing between the front surface of the first projectile 1 and the rear surface of the coil is 2mm. The position of the first projectile 1 is the loading position, and the first projectile 1 is coaxial with the loading channel. The electromagnetic coil is a circular copper coil with specifications of an inner diameter of 10mm, an outer diameter of 20mm, and a length of 5mm. The coil is passed with a current of 10 kiloampere-turns (kAt).

[0043] Assume that there is a mechanical force Figure 1 The projectile is fixed in the x direction. For the electromagnetic force on the projectile, Figure 3 Shown in Figure 1 The relationship between the electromagnetic force exerted on the first to third projectiles and the distance travelled by the first projectile under the structure.

[0044] Figure 3 In the figure, the six curves represent the forces on the first to third projectiles in the x and z directions. In the figure, the "1X" curve represents the force on the first projectile in the x direction, and the "1Z" curve represents the force on the first projectile 1 in the z direction, and the other curves are similar. Among them, the "1Z" curve is the "supply force" that drives the first projectile 1 to accelerate. Figure 3 In the figure, the horizontal axis represents the distance traveled by the first projectile 1 based on the "loading position" (i.e., the initial position). For example, when the horizontal axis is 5 mm, it means that the front surface of the first projectile 1 is 3 mm in front of the rear surface of the electromagnetic coil. The horizontal axis ranging from -3 mm to 0 mm does not occur in reality, and is only used here to make the data complete.

[0045] When the first projectile 1 is in the initial position (the horizontal axis is 0mm), the electromagnetic coil can generate a feeding force of 26N. When the projectile is relatively smooth, the feeding force is sufficient to overcome the friction and suck the first projectile 1 out of the magazine. At this time, the resistance loss power on the electromagnetic coil is 3.3kW. If the electromagnetic feeding device is constantly energized for 1ms each time it works, the energy lost is 3.3J. If the friction force on the projectile is not considered, the force of 26N can accelerate the projectile (mass 7.9g) to 3.3m / s within 1ms, which is enough to make the projectile slide to the acceleration section by inertia.

[0046] It is worth noting that under the action of the electromagnetic coil, the first to third projectiles are subjected to large forces in the x direction. Taking the first projectile 1 as an example, it will be subjected to a maximum downward (-x direction) electromagnetic force of 51N. These forces are generated by the mutual attraction of the projectiles after magnetization (assuming that the projectiles are fixed in the x direction by mechanical external forces), which can be seen from Figure 4 This phenomenon is analyzed from the magnetic induction intensity distribution shown. Figure 4 The left side shows the situation when the first projectile 1 advances -3 mm, and the right side shows the situation when it advances 15 mm.

[0047] Depend on Figure 4 It can be found that the magnetic attraction between the first projectile 1 and the second projectile 2 is very large, and these magnetic attraction forces will eventually become the contact pressure between the projectiles and transmit to each other, eventually bringing additional friction to the first projectile 1. The typical force situation when the first projectile 1 moves to 5mm is as follows Figure 5 As shown, Figure 5 The magazine spring pressure is assumed to be 0.

[0048] Although the feeding force of the electromagnetic coil on the first projectile 1 is usually sufficient to pull it to accelerate along the Z axis, it is obvious that the surface of the projectile cannot be smooth enough. When such a large contact pressure is generated in the X direction by the electromagnetic coil alone, the projectile needs to overcome a large resistance to complete the loading. In serious cases, the feeding force of the electromagnetic coil cannot even overcome these resistances, resulting in jamming. Therefore, these resistances seriously affect the reliability of loading.

[0049] In order to avoid or reduce the adverse effect of excessive magnetic attraction between projectiles caused by the electromagnetic coil on loading, an embodiment of the present application provides an electromagnetic feeding device, which also includes a loading assembly and a feeding assembly. The feeding assembly prepares the first projectile 1 with ferromagnetism to the loading position. The loading assembly is formed with a loading channel, and the first projectile 1 at the loading position is coaxial with the loading channel, and the first projectile 1 is accelerated and loaded from the loading channel. The loading assembly drives the first projectile 1 at the loading position to accelerate on the loading channel through the magnetic field generated by the electromagnetic coil and enters the acceleration section.

[0050] In order to reduce the magnetic attraction of other projectiles on the first projectile 1, in this embodiment, a shielding coil is provided around the bullet feeding assembly, and the magnetic field of the shielding coil acting on the position of the second projectile 2 adjacent to the first projectile 1 is offset by the magnetic field of the electromagnetic coil acting on the position. In this way, under the action of the magnetic field of the shielding coil 5, the magnetic attraction of the second projectile 2 (or other ferromagnetic materials at this position - such as a spring, the second projectile 2 is used as an example in the following description) on the first projectile 1 is reduced.

[0051] In some embodiments, Figure 1 As shown, the electromagnetic coil includes a first coil 4 adjacent to the loading position, and the inner cavity of the first coil 1 forms the end of the loading channel, that is, the loading channel passes through the inner cavity of the first coil 4. The magnetic field applied by the shielding coil 5 to the position of the second projectile 2 offsets the magnetic field applied by the first coil 4 to the position of the second projectile 2, thereby reducing the magnetic attraction of the second projectile 2 to the first projectile 1.

[0052] In some embodiments, the current direction of the shielding coil 5 is opposite to that of the first coil. In this way, no matter from which angle the feeding assembly feeds bullets, and no matter whether the loading assembly has other acceleration facilities, at least the shielding coil 5 can offset (all or part) the magnetic field of the first coil 4 acting on the second projectile 2, thereby reducing the magnetic attraction of the second projectile 2 to the first projectile 1 and reducing the friction of the first projectile 1 when it moves.

[0053] In some embodiments, the bullet feeding assembly prepares the first projectile 2 to the loading position from the side of the bullet feeding channel. In an embodiment, the bullet feeding path of the bullet feeding assembly can form a right angle or an acute angle with the axial direction of the loading channel. Figure 6 As shown, the feeding path of the feeding assembly is perpendicular to the axial direction of the loading channel. In other similar embodiments, the feeding path of the feeding assembly can be designed to be at an acute angle to the axial direction of the loading channel, and the principle is similar. That is, lateral feeding refers to preparing the first projectile 2 to the loading position from the radial direction of the loading channel (or the direction with a radial component), and the shielding coil 5 is wrapped around the feeding assembly. The current direction of the shielding coil 5 is opposite to the current direction of the first coil 4, thereby forming a magnetic field that offsets the electromagnetic coil 4.

[0054] As a preferred embodiment, the shielding coil is wrapped around the range between the second projectile 2 and the third projectile 3. In this way, the shielding coil 5 can effectively offset the accumulated magnetic attraction of the second projectile 2 (and other subsequent projectiles) on the first projectile 1.

[0055] like Figure 7 Shown in Figure 1 The magnetic induction intensity distribution diagram after the shielding coil 5 is set on the basis of the electromagnetic feeding device. Among them, the current of the electromagnetic coil is 10kAt, and the current of the shielding coil 5 is 1.5kAt. Figure 4By comparison, it can be seen that the magnetic field between the second projectile 2 and the first projectile 1 is effectively offset, thereby effectively reducing the magnetic attraction of the second projectile 2 to the first projectile 1.

[0056] As for the acceleration effect after adding the shielding coil 5, Figure 8 As shown, when the first projectile 1 is at 1mm, the forces of 1X, 2X, and 3X are -0.05N, 0.5N, and -2.3N respectively. When the shielding coil 5 is not provided, the corresponding forces are -16N, 3.8N, and 9.1N respectively. It can be seen that after the shielding coil 5 is provided, the magnetic attraction force of the second projectile 2 on the first projectile 1 in the X direction is greatly reduced. In this way, the friction force on the first projectile 1 caused by the electromagnetic force of the electromagnetic coil during loading can be greatly reduced, so that the combined force of feeding on the first projectile 1 is purer, and the first projectile 1 can enter the launching section more smoothly, thereby improving the speed and reliability of feeding.

[0057] Traditional ammunition feeding components usually feed ammunition by imitating the magazine of a gun, that is, there is an angle of nearly 90 degrees between the feeding path and the loading channel. This side-feeding structure will limit the loading speed of the electromagnetic feeding device, that is, it is impossible to accelerate the projectile at a high frequency, because the ammunition feeding component with this structure cannot prepare the projectile to the loading position at a high frequency. Only after the current projectile completely leaves the loading position can the next projectile be accelerated from a stationary state to the loading position, and decelerated back to zero by hitting the top of the magazine. This process of acceleration and deceleration back to zero takes the necessary time. For a projectile such as Φ8*20mm, when using the simplest spring-driven magazine, the preparation process often takes about 10ms, equivalent to a firing rate of 6000rpm. The greater the magazine elastic force, the shorter this process takes, but when accelerating the projectile at the loading position from a stationary state, a higher friction force needs to be overcome.

[0058] Because the bullets of a gun need to be fired from the end, they can only be fed from the side, but the electromagnetic feeding device does not need to be fired from the end, and can get rid of the limitation of having to feed from the side. The embodiment of the present application proposes an axial feeding implementation method, that is, the feeding assembly prepares the first projectile 1 to the loading position from the axial direction.

[0059] like Fig. 9 The figure shows the core structure of the electromagnetic feeding device that feeds ammunition from the axis of the loading channel. Among them, the projectile is a Φ8*20mm cylinder, made of 10 steel, and each projectile is connected end to end. The electromagnetic coil (the first coil 4) has an inner diameter of 10mm, an outer diameter of 20mm, a length of 10mm, and a material of copper. A current of 10kAt is passed through it. The center point of the coordinate system is at the geometric center of the coil. In this feeding mode, the feeding assembly will not interfere with the first coil 4 in the lateral direction, which provides greater flexibility for the setting of the loading position of the projectile. Fig. 9In the embodiment, the front surface of the first projectile 1 still coincides with the origin.

[0060] Before firing, the ammunition feeding assembly accelerates all the projectiles on the feeding path to a relatively low initial velocity, such as 10m / s. This speed can be provided by a mechanical roller or other device. When the first projectile 1 runs to the center of the first coil 4, the first coil 4 is energized to accelerate the first projectile 1, separate it from the other projectiles, and enter the acceleration section. The same operation is then performed on the other projectiles in turn. At this time, the feeding frequency is equal to the "projectile length" divided by the "initial velocity of the entire projectile." When the feeding speed of the ammunition feeding assembly is 10m / s, it takes 2ms to pass the length of a projectile (20mm), which is equivalent to a feeding frequency of 30,000 rpm. If a higher feeding frequency is required, the feeding speed of the ammunition feeding assembly can be further increased, or the projectile length can be reduced.

[0061] In this type of feeding method, there is no friction force introduced by the spring of the feeding assembly to the first projectile 1. However, the second projectile 2 still has a large magnetic attraction force on the first projectile 1, which still affects the acceleration effect of the first coil 4 on the first projectile 1.

[0062] like Fig.10 The figure shows the distribution of magnetic induction intensity for axial feeding. Fig.10 It can be seen that the first projectile 1 to the fifth projectile are all subjected to a relatively obvious electromagnetic force from the first coil 4. The specific force conditions are given by Fig.11 Shown. Fig.11 It can be found that the first projectile 1 is subjected to a backward electromagnetic force when it is in the loading position. This is because after the second projectile 2 is magnetized, the magnetic attraction force on the first projectile 1 is greater than the feeding force of the first coil 4 on the first projectile 1. Therefore, when loading, the first projectile 1 and the second projectile 2 will be attracted together. At the same time, at the loading position (0mm), the average electromagnetic force on the first projectile 1 and the second projectile 2 is smaller than the electromagnetic force on the third projectile 3. If a pulse current is passed through the first coil 4 at the initial position, the first projectile 1-the third projectile 3 will be accelerated as a whole.

[0063] In response to this situation, the embodiment of the present application also wraps a shielding coil 5 around the bullet feeding assembly to offset the magnetic field of the first coil 4 acting on the position of the second projectile 2, thereby reducing the magnetic attraction of the second projectile 2 to the first projectile 1.

[0064] like Fig.12 As shown, the shielding coil 5 still surrounds the bullet feeding assembly, and the preferred position is still the area between the second projectile 2 and the third projectile 3. The shielding coil 5 is coaxial (or parallel) with the bullet feeding path of the bullet feeding assembly. The current of the shielding coil 5 is opposite to the current of the first coil 4, thereby generating a magnetic field opposite to the first coil 4, offsetting the magnetic field conducted by the first coil 4 to the second projectile 2 and thereafter.

[0065] In some specific embodiments, the size of the shielding coil 5 is exactly the same as that of the first coil 4. For example, for a projectile with a size of Φ8*20mm, the center of the shielding coil 5 is located at z=-36mm, and a current of 3kAt is passed through it.

[0066] like Fig.13 The figure shows the distribution of magnetic induction intensity after adding the shielding coil 5. It can be seen from the figure that the magnetic field generated by the first coil 4 is blocked at the first projectile 1, and the magnetic field of the remaining projectiles is dominated by the shielding coil 5. The electromagnetic force on each projectile is as follows Fig.14 As shown. Fig.14 It can be seen that at the initial position, the first pellet 1 will be subjected to a forward electromagnetic force of 55N, while the second pellet 2 will be subjected to a backward electromagnetic force of 84N. Although the third pellet 3-the fifth pellet will also be subjected to a forward electromagnetic force, the resultant force on the second pellet 2-the fifth pellet is -0.2N, which is approximately equal to zero. Therefore, if a pulse current is passed through the first coil 4 and the shielding coil 5 at the initial position, only the first pellet 1 will be accelerated. The second pellet 2-the reading pellet are sucked together, and their feeding speed remains basically unchanged, which does not affect the acceleration of the first pellet 1, so that the effect of high-frequency and continuous feeding can be achieved.

[0067] In an embodiment of the present application, a bullet feeding assembly is proposed, which is used to prepare a first projectile 1 having ferromagnetism to a loading position, so that the loading assembly of the electromagnetic bullet feeding device can accelerate the first projectile 1 on the loading channel through the magnetic field generated by the electromagnetic coil. A shielding coil is wrapped around the bullet feeding assembly, and when the bullet feeding assembly is assembled on the electromagnetic bullet feeding device, the shielding coil acts on the magnetic field of the second projectile 2 adjacent to the first projectile 1, and the magnetic field of the electromagnetic coil acting on the position is offset.

[0068] In some embodiments, the electromagnetic coil includes a first coil 4 adjacent to the loading position, and the inner cavity of the first coil 4 forms the end of the loading channel. When the feeding assembly is assembled to the electromagnetic feeding device, the magnetic field applied by the shielding coil to the position of the second projectile 2 offsets the magnetic field applied by the first coil 4 to the position.

[0069] The feeding assembly can prepare the first projectile 1 to the loading position from the side or axial direction of the feeding channel. Regardless of the feeding method, the current direction of the shielding coil is opposite to the current direction of the first coil 4.

[0070] As a preferred embodiment, the shielding coil is arranged within the range of the second projectile 2 to the third projectile 3. Figure 1 As shown, the third projectile 3 is adjacent to the second projectile 2 .

[0071] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. An electromagnetic feeding device, comprising a loading assembly and a feeding assembly, wherein the feeding assembly prepares a first projectile having ferromagnetism to a loading position; the loading assembly is formed with a loading channel, and the first projectile at the loading position is coaxial with the loading channel; the loading assembly drives the first projectile to accelerate on the loading channel through a magnetic field generated by an electromagnetic coil; characterized in that: A shielding coil is arranged around the bullet feeding assembly, and the magnetic field of the shielding coil acting on the second projectile position adjacent to the first projectile is offset by the magnetic field of the electromagnetic coil acting on this position.

2. The electromagnetic ammunition feeding device according to claim 1, characterized in that: The electromagnetic coil includes a first coil adjacent to the loading position, and the inner cavity of the first coil forms the end of the loading channel; the magnetic field applied by the shielding coil to the second projectile position cancels out the magnetic field applied by the first coil to the position.

3. The electromagnetic ammunition feeding device according to claim 2, characterized in that: The current direction of the shielding coil is opposite to the current direction of the first coil.

4. The electromagnetic ammunition feeding device according to claim 1, characterized in that: The shielding coil is arranged in a range from the second projectile to the third projectile, and the third projectile is adjacent to the second projectile.

5. The electromagnetic ammunition feeding device according to any one of claims 1 to 4, characterized in that: The bullet feeding assembly prepares the first projectile to the loading position from the side or axial direction of the bullet feeding channel.

6. A feeding assembly, used for preparing a first projectile with ferromagnetism to a loading position, so that the loading assembly of an electromagnetic feeding device can accelerate the first projectile on a loading channel through a magnetic field generated by an electromagnetic coil; characterized in that: A shielding coil is wrapped around the bullet feeding assembly. When the bullet feeding assembly is assembled on the electromagnetic bullet feeding device, the shielding coil acts on the magnetic field of the second projectile position adjacent to the first projectile, which offsets the magnetic field of the electromagnetic coil acting on this position.

7. The ammunition supply assembly according to claim 6, characterized in that: The electromagnetic coil includes a first coil adjacent to the loading position, and the inner cavity of the first coil forms the end of the loading channel; when the feeding assembly is assembled on the electromagnetic feeding device, the magnetic field applied by the shielding coil to the second projectile position cancels out the magnetic field applied by the first coil to this position.

8. The ammunition supply assembly according to claim 7, characterized in that: The current direction of the shielding coil is opposite to the current direction of the first coil.

9. The ammunition supply assembly according to claim 6, characterized in that: The shielding coil is arranged in a range from the second projectile to the third projectile, and the third projectile is adjacent to the second projectile.

10. The ammunition feeding assembly according to any one of claims 6 to 9, characterized in that: The bullet feeding assembly prepares the first projectile to the loading position from the side or axial direction of the bullet feeding channel.

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