JP5730273B2 - Electromagnetic accelerator - Google Patents

Description

  The present invention relates to an electromagnetic accelerator, and more particularly to an electromagnetic accelerator capable of launching three or more flying objects all at once without a speed difference.

  Conventionally, an electromagnetic accelerator 500 as shown in FIGS. 16 to 17 is known (see Non-Patent Document 1).

  The electromagnetic acceleration device 500 of FIG. 16 includes three rail guns 15 in the vertical direction, each consisting of a pair of conductive rails 3 and 5 arranged in parallel in the horizontal direction and the armature 4 loaded in the acceleration space 19 therebetween. The rail guns 15 are arranged in three stages, and the rail guns 15 are connected in series by connecting lines 6 and 6 so as to generate magnetic lines of force in the same direction on a straight line connecting the acceleration spaces 19 of the rail guns 15. The current I is supplied from the switch 2.

  As shown in FIG. 17, the magnetic lines of force generated by the rail guns 15 strengthen each other to form one magnetic line 14, so that the three armatures 4 can be ejected simultaneously and efficiently.

Program and Abstract Booklet of 16th International Symposium on Electromagnetic Launch Technology, Beijing, May 15-19, 2012, EMI, # 058, # 061 p.135-136

In the conventional electromagnetic accelerator 500, the upper rail gun 15 contributes greatly to the magnetic lines of force from the middle rail gun 15, but the magnetic field lines from the lower rail gun 15 contribute less. Further, in the lower rail gun 15, the contribution of the magnetic lines of force from the middle rail gun 15 is large, but the contribution of the magnetic lines of force from the upper rail gun 15 is small. On the other hand, in the middle rail gun 15, both the contributions of the magnetic field lines of the upper and lower rail guns 15 are large. For this reason, the magnetic field lines in the middle rail gun 15 are stronger than the magnetic field lines in the upper and lower rail guns 15.
As a result, there is a problem that the acceleration force of the armature 4 in the middle rail gun 15 becomes stronger than the armature 4 in the upper and lower rail guns 15, resulting in a speed difference.
Therefore, an object of the present invention is to provide an electromagnetic accelerator capable of simultaneously launching three or more armatures without a speed difference.

In a first aspect, the present invention provides a rail gun (15) comprising a pair of conductive rails (3, 5) arranged in parallel and an armature (4) loaded in an acceleration space (19) therebetween. Three or more machines are arranged in an annular shape at equal intervals and with the conductive rails (3, 5) of each rail gun (15) aligned in the radial direction of the ring, and an acceleration space (19) of each rail gun (15) is provided. Electromagnetic accelerators (101, 102, 103, 104) characterized by connecting power supply means (1, 2, 6) for supplying power to the rail guns (15) so as to generate magnetic lines of force in the same direction on the connecting circle. , 105, 106).
In the electromagnetic accelerator according to the first aspect, since the strength of the magnetic lines of force in each rail gun (15) is the same, it is possible to launch three or more armatures (4) all at once without any speed difference. Moreover, since the magnetic lines of force generated by the rail guns (15) reinforce each other, it is possible to efficiently launch three or more armatures (4) all at once.
If there are two or less rail guns (15), the speed difference problem does not occur.

In a second aspect, the present invention relates to the electromagnetic accelerator according to the first aspect, wherein a pair of parallel conductor sides having the same shape as the pair of parallel conductive rails (3, 5) arranged in parallel are arranged on a rail gun (15). One-turn coils (25) having a structure short-circuited on the emission end side are mixed and arranged so that each one-turn coil (25) forms a magnetic field line in the same direction as the magnetic field lines of each rail gun (15). Provided is an electromagnetic acceleration device (103) characterized in that the power supply means (1, 2, 6) are connected so as to supply power to the coil (25).
If the number of railguns (15) is reduced in order to reduce the number of armatures (4) to be launched all at once, the lines of magnetic force become weak and the acceleration force decreases.
On the other hand, in the electromagnetic acceleration device according to the second aspect, since the one-turn coil (25) that does not drive out the armature (4) but generates the magnetic field lines equivalent to the railgun (15) is mixed, all at once. It is possible to reduce the number of armatures (4) to be punched out and to avoid weakening the magnetic lines of force.

In a third aspect, the present invention provides the electromagnetic acceleration device according to the first or second aspect, wherein the rail guns (15) are arranged in an internal space of the conductor tube (27). An apparatus (104) is provided.
Since there is a space between the adjacent railguns (15), the magnetic lines of force leak outside from the space.
On the other hand, in the electromagnetic acceleration device according to the third aspect, the leakage of the magnetic lines of force to the outside can be suppressed by the conductor cylinder (27) arranged outside the rail gun (15).

In a fourth aspect, the present invention relates to the electromagnetic accelerator according to any one of the first to third aspects, wherein the directions of the rail guns (15) are parallel to each other. , 103, 104).
In the electromagnetic acceleration device according to the fourth aspect, the armatures (4) that are launched all at once reach the target in an annular shape with the size of the ring in which the railguns (15) are arranged, regardless of the distance to the target. Yes.

In a fifth aspect, the present invention provides the electromagnetic accelerator according to any one of the first to third aspects, wherein power is supplied when the direction of each rail gun (15) extends the direction of each rail gun (15). Provided is an electromagnetic accelerator (105, 106) characterized in that the direction of convergence is at one point on the end side or one point on the exit end side.
In the electromagnetic acceleration device according to the fifth aspect, the armature (4) that is launched all at once has an annular shape that is larger or smaller than the size of the ring in which the railguns (15) are arranged, depending on the distance to the target. You can reach the target side by side.

  According to the electromagnetic accelerator of the present invention, three or more armatures can be launched simultaneously and efficiently without a speed difference.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view illustrating a power feeding end side of an electromagnetic accelerator according to a first embodiment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view illustrating an emission end side of an electromagnetic accelerator according to a first embodiment. FIG. 3 is an end view taken along line AB in FIG. 2. It is explanatory drawing which shows the magnetic force line of the electromagnetic accelerator which concerns on Example 1. FIG. 6 is an external view showing a power feeding end side of an electromagnetic accelerator according to Embodiment 2. FIG. 6 is an external view showing a power feeding end side of an electromagnetic accelerator according to Embodiment 3. FIG. FIG. 6 is an external view showing an emission end side of an electromagnetic accelerator according to a third embodiment. It is an AB end view of FIG. It is explanatory drawing which shows the magnetic force line of the electromagnetic accelerator which concerns on Example 3. FIG. FIG. 10 is an external view showing a power feeding end side of an electromagnetic accelerator according to a fourth embodiment. FIG. 10 is an external view showing an emission end side of an electromagnetic accelerator according to a fourth embodiment. It is an AB end view of FIG. It is explanatory drawing which shows the magnetic force line of the electromagnetic accelerator which concerns on Example 4. FIG. FIG. 9 is a diagram corresponding to FIG. 3 of the electromagnetic accelerator according to the fifth embodiment. FIG. 9 is a view corresponding to FIG. 3 of an electromagnetic accelerator according to a sixth embodiment. It is the perspective view seen from the electric power feeding end side of the electromagnetic accelerator which concerns on a prior art example. It is explanatory drawing which shows the magnetic force line of the electromagnetic accelerator which concerns on a prior art example.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.

Example 1
FIG. 1 is an external view illustrating a power feeding end side of the electromagnetic acceleration device 101 according to the first embodiment.
This electromagnetic acceleration device 101 is composed of eight rail guns 15 consisting of a pair of parallel conductive rails 3 and 5 and an armature 4 loaded in an acceleration space between them (19 in FIG. 3) in an annular shape. The pair of conductive rails 3 and 5 of each rail gun 15 are arranged at equal intervals (= 360 ° / 8 = 45 ° intervals) so that currents in the same direction are applied to the conductive rails 3 outside the rail guns 15. Each rail gun 15 is connected in series with connection lines 6, 6, 6, 6, 6, 6 and 6 so as to flow, and power is supplied from the pulse power supply 1 and the switch 2 to the series circuit.

  The conductive rail 3 outside each rail gun 15 is fixed to a solid metal cylinder frame 22 via an insulating cylinder 26. Further, the conductive rail 5 inside each rail gun 15 is fixed to a solid metal core 32 through an insulating layer 36. Further, an insulating partition 31 is interposed between each rail gun 15.

FIG. 2 is an external view illustrating the emission end side of the electromagnetic acceleration device 101 according to the first embodiment.
A short-circuit inductance 23 is connected between the output ends of the conductive rails 3 and 5 of each rail gun 15.

3 is an end view taken along the line AB of FIG.
The direction of each rail gun 15 is parallel.

  Specifically, the conductive rails 3 and 5 are made of copper having a size of 55 mm × 55 mm × 3 m, and the distance between the pair of conductive rails 3 and 5 is 35 mm. The armature 4 is made of copper having a size of 55 mm × 55 mm × 35 mm. The metal cylinder frame 22 is an iron cylinder having an outer diameter of about 80 cm. The metal core 32 is an iron cylinder having a diameter of about 20 cm.

FIG. 4 is an explanatory diagram illustrating lines of magnetic force in the electromagnetic acceleration device 101 according to the first embodiment.
When the switch 2 is closed, a current I flows through the conductive rails 3 and 5 and the armature 4 of each rail gun 15. The direction of the current I flowing through the conductive rail 3 outside each rail gun 15 is the same. Therefore, the direction of the current I flowing through the conductive rail 5 inside each rail gun 15 also coincides. As a result, magnetic force lines 14 that are strengthened to each other in the same direction on the circumference connecting the acceleration spaces 19 of the rail guns 15 are generated.

  According to the electromagnetic acceleration device 101 according to the first embodiment, since the strength of the magnetic force lines 14 is the same in each rail gun 15, eight armatures 4 can be launched all at once without any speed difference. Further, since the lines of magnetic force generated by the rail guns 15 reinforce each other, the eight armatures 4 can be ejected simultaneously and efficiently. In addition, regardless of the distance to the target, the eight armatures 4 can reach the target in an annular shape with the size of the ring in which eight rail guns 15 are arranged.

  Actually, for example, a plastic flying object is attached to the armature 4, and the flying object is ejected from each rail gun 15.

-Example 2-
FIG. 5 is an explanatory diagram illustrating lines of magnetic force in the electromagnetic acceleration device 102 according to the second embodiment.
The electromagnetic accelerator 102 has a configuration in which the eight rail guns 15 in the first embodiment are reduced to four.

According to the electromagnetic acceleration device 102 according to the second embodiment, the number of armatures 4 to be launched simultaneously can be four.
However, compared to the electromagnetic acceleration device 101 according to the first embodiment, the number of rail guns 15 that generate magnetic lines of force is reduced, and the magnetic lines of force that leak between the adjacent rail guns 15 leak from the space. It becomes weaker and the acceleration force decreases.

Example 3
FIG. 6 is an external view illustrating the power feeding end side of the electromagnetic acceleration device 103 according to the third embodiment.
This electromagnetic acceleration device 103 is composed of four rail guns 15 each having an annular shape composed of a pair of parallel conductive rails 3 and 5 and an armature 4 loaded in an acceleration space (19 in FIG. 8) therebetween. A pair of conductive rails 3 and 5 of each rail gun 15 are arranged at equal intervals (= 360 ° / 4 = 90 ° intervals) and arranged in a radial pattern, and a pair of conductive rails 3 and 5 are arranged between the rail guns 15. A single-turn coil 25 having a structure in which a pair of parallel conductor sides having the same shape as that of the rail gun 15 is short-circuited on the output end side of the rail gun 15 is disposed. Each of the rail guns 15 and the one-turn coil 25 are connected in series with connection lines 6, 6, 6, 6, 6, 6, 6 so that currents in the same direction flow through the conductor sides, and the pulse power source 1 is connected to the series circuit. And power from switch 2 This is the structure.

  The conductive rails 3 outside the rail guns 15 and the conductor sides outside the one-turn coils 25 are fixed to a sturdy metal cylinder frame 22 via insulating cylinders 26. The conductive rail 5 inside each rail gun 15 and the conductor side inside each one-turn coil 25 are fixed to a solid metal core 32 via an insulating layer 36. In addition, an insulating partition 31 is interposed between each rail gun 15 and each one-turn coil 25.

FIG. 7 is an external view illustrating the emission end side of the electromagnetic accelerator 103 according to the third embodiment.
A short-circuit inductance 23 is connected between the output ends of the conductive rails 3 and 5 of each rail gun 15.
A pair of conductor sides of each one-turn coil 25 is short-circuited by a short-circuit side on the emission end side of the rail gun 15.

8 is an end view taken along the line AB of FIG.
The directions of each rail gun 15 and each one-turn coil 25 are parallel.

  Specifically, the conductive rails 3 and 5 are made of copper having a size of 55 mm × 55 mm × 3 m, and the distance between the pair of conductive rails 3 and 5 is 35 mm. The armature 4 is made of copper having a size of 55 mm × 55 mm × 35 mm. The conductor side of the single turn coil 25 is made of copper having a size of 55 mm × 55 mm × 3 m, the distance between the pair of conductor sides is 35 mm, and the size of the short circuit side is made of copper having a size of 55 mm × 55 mm × 35 mm. The metal cylinder frame 22 is an iron cylinder having an outer diameter of about 80 cm. The metal core 32 is an iron cylinder having a diameter of about 20 cm.

FIG. 9 is an explanatory diagram illustrating lines of magnetic force in the electromagnetic acceleration device 103 according to the third embodiment.
When the switch 2 is closed, a current I flows through the conductive rails 3 and 5, the armature 4, and each one-turn coil 25 of each rail gun 15. The directions of the current I flowing through the conductive rails 3 outside the rail guns 15 and the conductor sides outside the one-turn coils 25 are the same. Therefore, the directions of the currents I flowing through the conductive rails 5 inside each rail gun 15 and the conductor sides inside each one-turn coil 25 also coincide with each other. As a result, the magnetic force lines 14 that are strengthened to each other in the same direction are generated on the circumference connecting the space between the conductor sides to the acceleration space 19 of each rail gun 15 and the pair of each one-turn coil 25.

  According to the electromagnetic acceleration device 103 according to the third embodiment, since the strength of the magnetic force lines 14 is the same in each rail gun 15, four armatures 4 can be launched all at once without any speed difference. Moreover, since the magnetic lines of force generated by each rail gun 15 and each one-turn coil 25 reinforce each other, the four armatures 4 can be ejected simultaneously and efficiently. In addition, regardless of the distance to the target, the four armatures 4 can reach the target in an annular shape with the size of a ring in which the four rail guns 15 are arranged. Furthermore, since the one-turn coil 25 that does not launch the armature 4 but generates magnetic lines of force equivalent to that of the rail gun 15 is mixed, the number of armatures 4 to be launched simultaneously can be reduced and the magnetic lines of force can be prevented from being weakened. I can do it.

  The structure in which the same number of rail guns 15 and one-turn coils 25 are alternately arranged as in the third embodiment is excellent in symmetry, but it is not always necessary to arrange them alternately. As a modification, for example, seven rail guns 15 and one machine are provided. The single turn coil 25 may be used, or three rail guns 15 may be used and five may be used as the single turn coil 25.

  In applications where it is not necessary to launch three or more armatures 4 all at once, two railguns 15 and six one-turn coil 25, or only one railgun 15 and the other seven All can also be used as a single turn coil 25.

Example 4
FIG. 10 is an external view illustrating the power feeding end side of the electromagnetic acceleration device 104 according to the fourth embodiment.
This electromagnetic acceleration device 104 is composed of four rail guns 15 consisting of a pair of conductive rails 3 and 5 arranged in parallel and an armature 4 loaded in an acceleration space between them (19 in FIG. 12) in an annular shape. The pair of conductive rails 3 and 5 of each rail gun 15 are arranged at equal intervals (= 360 ° / 4 = 90 ° intervals) so that currents in the same direction are applied to the conductive rails 3 outside the rail guns 15. Each rail gun 15 is connected in series with connection lines 6, 6, 6 so as to flow, and the series circuit is supplied with power from the pulse power source 1 and the switch 2, and further, a conductor cylinder 27 surrounding the outside of each rail gun 15 is provided. This is a configuration provided.

  The conductive rails 3 outside the rail guns 15 and the conductor sides outside the one-turn coils 25 are fixed to a sturdy metal cylinder frame 22 via insulating cylinders 26 and conductor cylinders 27. Further, the conductive rail 5 inside each rail gun 15 is fixed to a solid metal core 32 through an insulating layer 36. Further, an insulating partition 31 is interposed between each rail gun 15.

FIG. 11 is an external view illustrating the emission end side of the electromagnetic acceleration device 104 according to the fourth embodiment.
A short-circuit inductance 23 is connected between the output ends of the conductive rails 3 and 5 of each rail gun 15.

12 is an end view taken along the line AB of FIG.
The direction of each rail gun 15 is parallel.

  Specifically, the conductive rails 3 and 5 are made of copper having a size of 55 mm × 55 mm × 3 m, and the distance between the pair of conductive rails 3 and 5 is 35 mm. The armature 4 is made of copper having a size of 55 mm × 55 mm × 35 mm. The metal cylinder frame 22 is an iron cylinder having an outer diameter of about 80 cm. The metal core 32 is an iron cylinder having a diameter of about 20 cm. The conductor cylinder 27 is a copper cylinder having a thickness of about 5 mm.

FIG. 13 is an explanatory diagram illustrating lines of magnetic force in the electromagnetic acceleration device 104 according to the fourth embodiment.
When the switch 2 is closed, a current I flows through the conductive rails 3 and 5 and the armature 4 of each rail gun 15. The direction of the current I flowing through the conductive rail 3 outside each rail gun 15 is the same. Therefore, the direction of the current I flowing through the conductive rail 5 inside each rail gun 15 also coincides. As a result, magnetic force lines 14 that are strengthened to each other in the same direction on the circumference connecting the acceleration spaces 19 of the rail guns 15 are generated.

  As previously described in the second embodiment, if there is no conductor cylinder 27, the magnetic lines 14 leak to the outside from the space between the adjacent rail guns 15. However, in the fourth embodiment, since the conductor cylinder 27 is disposed outside the rail gun 15, leakage of the magnetic lines 14 to the outside can be suppressed.

  According to the electromagnetic acceleration device 103 according to the fourth embodiment, since the strength of the magnetic force lines 14 is the same in each rail gun 15, four armatures 4 can be launched all at once without any speed difference. Further, since the magnetic lines of force generated by the rail guns 15 reinforce each other, the four armatures 4 can be ejected simultaneously and efficiently. In addition, regardless of the distance to the target, the four armatures 4 can reach the target in an annular shape with the size of a ring in which the four rail guns 15 are arranged. Furthermore, since the leakage of the magnetic force lines 14 to the outside of the rail gun 15 can be suppressed by the conductor cylinder 27, it is possible to reduce the number of armatures 4 that are ejected all at once and to prevent the magnetic force lines from becoming weak.

-Example 5
FIG. 14 is a diagram corresponding to FIG. 3 in the electromagnetic accelerator 105 according to the fifth embodiment.
The electromagnetic accelerator 105 has a configuration in which the directions of the eight rail guns 15 in the first embodiment are not parallel, and are converged at one point on the power feeding end side when the directions of the rail guns 15 are extended. That is, eight rail guns 15 are arranged in an annular shape at equal intervals, and the size of the ring increases from the feeding end side to the injection end side. The other configuration is the same as that of the first embodiment.

  According to the electromagnetic accelerator 105 according to the fifth embodiment, the eight armatures 4 that are launched at the same time fly in a ring shape larger than the ring shape in which the rail guns 15 are arranged. The size of the ring formed by the eight armatures 4 flying increases as the flight distance increases.

-Example 6
FIG. 15 is a diagram corresponding to FIG. 3 in the electromagnetic accelerator 106 according to the sixth embodiment.
The electromagnetic acceleration device 106 is configured such that the directions of the eight rail guns 15 in the first embodiment are not parallel, and are converged at one point on the emission end side when the direction of each rail gun 15 is extended. That is, eight rail guns 15 are arranged in an annular shape at equal intervals, and the size of the ring decreases from the feeding end side to the injection end side. The other configuration is the same as that of the first embodiment.

  According to the electromagnetic acceleration device 106 according to the sixth embodiment, the eight armatures 4 that are launched all at once fly in an annular shape that is smaller than the size of the annular shape in which the rail guns 15 are arranged. The size of the ring formed by the eight armatures 4 that fly is smaller as the distance to the target is longer, and is concentrated at one point at a certain distance.

-Other examples-
(1) The direction of the three or more rail guns 15 can be changed symmetrically with respect to the central axis Ax by using a mechanism such as an umbrella that can open and close the main bone (rib) with the center rod (shaft) as the central axis. Is preferred.
(2) In the first to sixth embodiments, since three or more rail guns 15 are connected in series, the current I having the same magnitude can be supplied to all the rail guns 15, and only one current adjusting circuit is required. On the other hand, a current adjustment circuit may be provided for each rail gun 15 and three or more rail guns 15 may be connected in parallel. In this case, the speed of the armature 4 of each rail gun 15 can be finely adjusted individually by current adjustment.
(3) The number of rail guns 15 is arbitrary as long as it is three or more.

  The electromagnetic accelerator of the present invention can be used for, for example, an impact test.

DESCRIPTION OF SYMBOLS 1 Pulse power supply 2 Switch 3, 5 Conductive rail 4 Armature 6 Connection line 14 Magnetic field line 15 Rail gun 19 Acceleration space 22 Metal cylinder frame 23 Short-circuit inductance 25 Single turn coil 26 Insulation cylinder 27 Conductor cylinder 31 Insulation partition 32 Metal core 36 Insulating layer 101-106,500 Electromagnetic accelerator Ax Central axis of an annulus formed by an array of rail guns

Claims (4)

Three or more rail guns (15) consisting of a pair of conductive rails (3, 5) arranged in parallel and an armature (4) loaded in an acceleration space (19) between them are annularly spaced at equal intervals. In addition, the conductive rails (3, 5) of each rail gun (15) are arranged so as to be aligned in the radial direction of the ring, and magnetic lines of force are applied in the same direction on the circumference connecting the acceleration spaces (19) of the rail guns (15). A power supply means (1, 2, 6) for supplying power to each rail gun (15) is connected so as to be generated, and a pair of parallel conductor sides having the same shape as the pair of parallel conductive rails (3, 5) are connected. A single-turn coil (25) having a structure short-circuited on the output end side of the rail gun (15) is arranged in a mixed manner, and the single-turn coil (25) forms a magnetic force line in the same direction as the magnetic force line of each rail gun (15). To feed each one-turn coil (25) Electromagnetic accelerator, characterized in that connecting the serial power supply means (1,2,6) (103). The electromagnetic acceleration device (104) according to claim 1, wherein the rail guns (15) are arranged in an internal space of the conductor tube (27) . The electromagnetic acceleration device (103, 104) according to claim 1 or 2, characterized in that the directions of the rail guns (15) are parallel . 3. The electromagnetic accelerator according to claim 1, wherein the direction of each rail gun (15) converges at one point on the feeding end side or one point on the emission end side when the direction of each rail gun (15) is extended. An electromagnetic accelerator (105, 106) characterized by being in such a direction .

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