JPS62239854A - Electromagnetic launching appartatus - Google Patents

Abstract

PURPOSE:To improve continuous launching function, by arranging excitation coils generating a magnetic field orthogonal to a current flowing from a first feeding rails to a second feeding rails. CONSTITUTION:A cyindrical launching 13 fitting a launching projectile 10 is formed by providing an insulation unit 14, with a first feeding rails 15a and a second feeding rails 15b in parallel with the rails 15a. On the periphery of a cylindrical frame 16, a pair of saddle-formed excitation coils 17 are arranged. On the outer periphery of its assembly unit, the peripheral surface is fixed with an insulation bind 20, and on its outer periphery, an external cylinder 21 is fitted, and the whole unit is formed to be the launching cylinder 22 of double cylinder structure. The promotion and the acceleration of the launching projectile 10 is executed by a great current power source 3 and an excitation power circuit 9 different from the power source 3. Then, by an electromagnetic force due to a relative action between current flowing to the projectile 10 and a magnetic field, the projectile 10 is driven and accelerated, and so an extremely high launching acceleration can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an electromagnetic launcher, and more particularly to an electromagnetic launcher equipped with a power supply rail and a magnetic field generating excitation coil suitable for accelerated launch of a projectile.

(Prior Art) Electromagnetic launch devices are known as high pressure generation means or projectile launch means.

Conventionally, the electromagnetic firing device of this crosspiece was a coaxial type 7I with a single stage linear motor, such as those used in magnetically levitated vehicles.
The projectile is propelled along the rails by distributing power between the O-speed device and two parallel copper rails, electrically coupling these two rails and the projectile, and passing a current. In other words, there is a rail-energized type electromagnetic launch ifl ($1! I No. 1986-129832, Tokuto No. 74273 Sho 60-60, etc.) that directly supplies power to the projectile and fires it using electromagnetic force.

Accelerated firing methods for rail-energized electromagnetic launchers include switching operations of power supply circuits that flow large currents, and methods using a power supply rail arrangement structure that electrically connects multiple power supply rails to obtain a strong magnetic field. For example, U.S. Pat. No. 4,347,463 can be cited as a related configuration of a combined accelerated firing method.

Furthermore, as a method of increasing the acceleration of launch, as shown in FIG. Auxiliary rail to increase magnetic field
m' and lb' are provided in parallel to the power supply rail, and are connected in series with the power supply rail, and as shown by the arrow in the figure, by flowing a current in the same direction as the current in the power supply rail, the firing can be carried out. His body was firing at an accelerated rate.

(Problems to be Solved by the Invention) When a two-tiered rail arrangement structure including a power supply rail and an auxiliary rail as described above is constructed as a cylindrical structure launcher, the insulation between the power supply rail and the auxiliary rail becomes In terms of securing and strengthening the fixation of these rails, it is unavoidable to increase the size, and it is extremely difficult to improve functionality8 while maintaining a compact size and light weight.

In addition, to increase the acceleration If by other means, it is necessary to increase the power supply capacity for direct power supply, but this has the problem of increasing the size of the entire device including the power supply, and damage to the running surface of the power supply rail. There was a problem that the continuous firing function deteriorated significantly, and measures were needed to improve the entire device.

The present invention has been made in view of the above-mentioned VC points, and its purpose is to provide a direct power feeding projectile from a power feeding rail.
The object of the present invention is to provide an electromagnetic generator II4i&lt which can be continuously accelerated and launched by the electromagnetic induction effect of the current and a magnetic field perpendicular to the current direction κ flowing from the power supply rail to the projectile.

(Means for solving the problem) The above object is to provide an excitation coil that generates a magnetic field in a direction perpendicular to the current flowing from the first power supply rail through the projectile to the second power supply rail, and m due to the interaction between the current flowing through the body and the magnetic field (Fleming's left hand rule)
This is achieved by driving and accelerating the projectile with an s force.

Note that the excitation coil can also be used as an inductor that is directly inserted in series with the power supply circuit, or can be made of a superconducting material.

(Function) As described above, the power is transferred from the first power supply rail to the second power supply via the projectile.
An excitation coil that generates a magnetic field perpendicular to the direction of the current flowing through the power supply rail is arranged in parallel to sandwich the projectile, and the electromagnetic force generated by the interaction between the current flowing through the projectile and the magnetic field causes the projectile to be Since the projectile is driven and accelerated, it is possible to obtain a much larger launch acceleration compared to the case where the projectile is accelerated and launched only by the interaction between the magnetic field caused by the current in the power supply rail and the current flowing through the projectile.

On the other hand, since the current flowing through the power supply rail can be reduced, the projectile can be launched at a higher rate than the initial launch launch with a low current supply without damaging the running surface of the rail and reducing the continuous launch function. , it is possible to miniaturize the device and improve its functionality.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. First, the principle of operation of the present invention is shown in FIG.

In FIG. 1, the electromagnetic emitting device of the present invention comprises two parallel copper rails la, lb and excitation coils 2a, 2b.

A main power circuit 6 is connected to the copper rails la and lb, in which a large current #3, an inductor 4 for temporarily storing electrical energy, a switch 5 for opening and closing the power supply, etc. are connected in series.

An excitation power supply circuit 9 having an electric power source 7 separate from the main power supply circuit 60 and the large current power supply 3 and having an on/off switch 8 is connected to the excitation coils 2a and 2b. Further, the firing hole 11 for firing the projectile 10 is formed into a cylindrical shape (1%
cylindrical) Ic is formed.

When operating the electromagnetic emitting device configured as described above, first turn on the switch 5 of the main power circuit 6, and then connect the copper rails la,
A current 11 is applied to the projectile 10 via lb. current 1
The magnetic field created at the position of the projectile 10 by 1 and the current ■
Due to the interaction of 1, a thrust (electromagnetic force based on Fleming's left-hand rule) F acts on the projectile 10, and one projectile 10 is launched.

At the same time, the on/off switch 8 of the excitation power supply circuit 9
8 and excite the excitation coils 2m and 2b, a current Il flows from the copper rails la and lb to the projectile 10.
A magnetic field B is generated in the same direction as the magnetic field generated by .

This allows the projectile 10 to have copper rails 1 & rl
Since the thrust force F acts in a superimposed manner in the same direction as the direct power supply from b, the acceleration when the projectile 100 is launched is enhanced.

As described above, in the electromagnetic launch device equipped with the steel rail la+1b for direct power supply and the excitation coils 2a and 2b for indirect power supply, the thrust due to the direct power supply from the main power supply circuit 6 and the thrust due to the indirect power supply from the excitation power supply circuit 9 are combined. It can be fired by adding the total effect.

That is, according to the present invention, the power supply number, 38, of the main power supply circuit 6 is
It is possible to provide an effective electromagnetic launch device without increasing the size of the projectile, since it is possible to launch an initially launched projectile with a relatively low current at higher speeds by strengthening the magnetic field through indirect power supply, without causing damage to the runway surface. can.

In the above, the main 1! which directly supplies power to the steel rails la, lb!
The operating principle of an electromagnetic emitting device including a source circuit 6 and excitation coils 2a and 2b provided by an excitation power supply circuit that provides indirect power supply has been described.
+2b can be configured in any manner.

That is, the excitation coil is formed into a saddle-shaped coil, a flat coil, or a concentrated winding coil formed of large, medium, and small coils, and each saddle-shaped coil, flat coil, and concentrated winding coil is connected to a copper rail of 1 m. , 1b are placed in a (circular) simple frame or a drum-shaped frame.

Specific examples will be described below with reference to the drawings. A first embodiment of the present invention is shown in FIGS. 2 and 3.

In FIGS. 2 and 3, the cylindrical firing hole 13 into which the projectile 10 is mounted is formed by disposing a first power supply rail 15a and a second power supply rail 15b parallel to the first power supply rail 15a in the insulator 14. The first power supply rail 15a, the second power supply rail 15b and the insulator 14 are housed and fixed in a cylindrical frame 16 made of non-magnetic metal, for example stainless steel.

This cylinder is moved around the frame 16 by 9Of in the circumferential direction from the rail width center direction O-O of the first power supply rail 15a and the second power supply rail 15b, and is moved to the coil width center position of the coil width H. A pair of saddle-shaped excitation coils 1
7 are installed.

A saddle-shaped excitation coil 17 disposed in the cylindrical formwork 16 is firmly fixed by a ball spacer 18 and an interpolar spacer 19. The outer periphery of these assemblies is further fixed with a ceramic insulated insulating binder 20, and an outer cylinder 218 is attached to the outer periphery of the assembly to form a launch cylinder 22 with a double cylindrical structure.
It is composed of

The projectile IO is propelled by closing the switch 5 of the main power supply circuit #86, which includes the large current power supply 3, the inductor 4, etc., and by closing the switch 8 of the excitation power supply circuit 9, which is separate from the large current power supply 3. The desired accelerated firing is achieved.

In the above first embodiment, the first power supply rail 15a1
the second power supply rail 15b, and the first power supply rail 15b; 2nd power supply rail
15a, 15b%l! iil constant insulator 1
A saddle-shaped excitation coil 17 was disposed around the inner cylinder 16 that accommodated the fourth and other components.

However, when the saddle-shaped excitation coil 17 is arranged in a cylindrical formwork, the gap between the cylindrical firing hole 13 and the saddle-shaped excitation coil 17 becomes large, and there is a concern that the effective magnetic field will decrease. Further, when the saddle-shaped excitation coil 17 is disposed on a cylindrical surface, there is a problem in terms of manufacturing work that the initial fixation is solid, which is inefficient.

As an arrangement structure that can solve such problems, obtain the same effect as the above embodiment, and further improve production work efficiency, the first power supply rail 15a and the second power supply rail 15 are provided.
It is conceivable to house the insulator 14 etc. integrated with b in a drum-shaped mold, and arrange the excitation coil in the flat part of the mold.

FIGS. 4 and 5 show a second actual mflll of the present invention.

In this second embodiment, a first power supply rail 15a, a second power supply rail 15b, and an insulator 14 to which they are fixed are housed in a drum-shaped formwork 25 having a flat part 23 and an arc part 24,
A flat excitation coil 26 wound in a flat shape is disposed on the flat portion 23 of the drum-shaped frame 25.

According to the second embodiment configured as described above, since the excitation coil that generates the accelerating magnetic field is the flat excitation coil 26, the insulation gap between the cylindrical firing hole 13 and the flat excitation coil 26 is narrowed, and the cylindrical firing hole The magnetic field generation applied to the projectile 13 is strengthened, and the projectile 10 is accelerated and launched at a higher speed.

Further, the flat excitation coil 26 is connected to the flat part 2 of the drum-shaped formwork 25.
3, it becomes easy to assemble the device and manufacture the excitation coil, making it possible to obtain an effective electromagnetic emitting device. In this song, it is clear that the same effect can be obtained even if a concentrated winding excitation coil formed of large and small coils is arranged in the drum-shaped frame 25.

A third embodiment of the present invention is shown in FIGS. 6 and 7.

In this third embodiment, the '@1 power supply rail 15a, the second
The formwork 25 that accommodates the power supply rail 15b and the insulator 14 etc. that embeds and fixes it is made into the same drum shape as in the second embodiment, and a small coil 27, A concentrated winding excitation coil 30 formed of a medium coil 28, a large coil 29, etc. is arranged, and the concentrated winding excitation coil 30
is fixed with a fixed guide 31 made of non-magnetic metal, and the intermediate part around the concentrated winding excitation coil 300 is completely insulated with a ceramic insulator 32, and is housed integrally in the outer cylinder 21.

According to the third embodiment configured as described above, in addition to obtaining the same electrical effect as the second embodiment, the concentrated winding excitation coil 30 has a small coil 27 and a medium coil with good workability. 2
8. Since the large coil 29 is formed as a divided coil whose size matches the size of the coil, the moldability as an excitation coil is improved.

That is, in the second embodiment, the excitation coil 26 is integrally wound, and the power supply rail 15m of the coil,
Since the dimension along the 15b direction is long, there is a problem that the winding tends to bulge in this part, and the magnetic field tends to vary due to manufacturing variations.However, in the third embodiment, the coil is divided. Furthermore, since each divided coil is fixedly shaped using a mold, the winding does not bulge as described above, and variations in characteristics can be suppressed to a minimum.

In addition, since the ζ excitation coil is formed in sections, even if the coil is broken or damaged, it can be replaced quickly and easily.

The first to third embodiments described above have a main power supply circuit 6 that flows a large current to the first power supply rail 15m to which the projectile 10 is glidingly fed, a second power supply rail 15b, and an exciting coil that flows a piezoelectric current. Although the excitation power supply circuit 9 is provided separately, even if the inductor 4 of the main power supply circuit 6 is replaced with an excitation coil, the same effects as in each of the above embodiments can be obtained.

FIG. 8 shows a fourth embodiment of the present invention in which an inductor is used as an excitation coil.

In the fourth embodiment, the projectile 10 is mounted between the first power supply rail 15m and the second power supply rail 15b, and this projectile 1
Inductor coils 35a and 35b sandwich 0.
are arranged so that the magnetic field generated by the inductor coils 35a and 35b intersects the current Is flowing through the projectile 10.

Then, the first power supply rail 15m and the second power supply rail 1
5b and the inductor fills 35m, 35b, a power supply circuit 38 having a large current power supply 3 and an on/off switch 5 is electrically connected in series.

In the fourth embodiment configured as described above, the excitation coil for generating a magnetic field for accelerating the projectile 10 is also used as an inductor that temporarily stores the energy of the main power supply circuit. Compared to the excitation coil arrangement in the example, a separate power source serving as an excitation power source and an excitation coil are not required, and the structure is open-circuited.

In addition, the electrical connection method is also greatly improved, such as by connecting the power source in series. On the other hand, it is a must for accelerated firing!
The effect of magnetic field generation can be maintained at the same level as in the previous embodiment.

As mentioned above, an electromagnetic launcher is a device that fires a projectile by instantaneously applying a large current of tens of thousands of amperes to hundreds of thousands of amperes. In order to increase the current, an even larger current is required.

However, there are limits to this, and if a large current of hundreds of thousands of amperes to millions of amperes is applied continuously, the firing function of the device will be significantly impaired due to wear and tear on the feeding rail sliding surface and adhesion of spatter due to the feeding impact. There are concerns about the problem of deterioration.

In order to solve the above problems and accelerate the initial startup of the projectile while directly supplying power with a small current, as shown in Figures 9 and 10, the excitation coil is made of superconducting wire. A superconducting coil wound with

9 and 10 show the fifth embodiment of the present invention, and the sixth embodiment
This corresponds to the case where the excitation coil of the third embodiment shown in FIG. 7 and FIG. 7 is replaced with a superconducting coil.

A superconducting excitation coil 37 is placed on the flat part 23 of the drum-shaped formwork 25.
Helium refrigerant tank 38 and vacuum insulation layer 39
The drum-shaped formwork 25 and the coil container 100 are integrated with an insulator 32 and housed and molded in the outer cylinder 21.

In the electromagnetic launch device of the fifth embodiment configured as described above, the excitation coil that generates the accelerating magnetic field between the first power supply rail and the second power supply rail is a superconducting excitation coil, so a small and lightweight coil can be used. It is possible to carry a large current and can be expected to generate a high magnetic field.

As a result of 7, it is possible to fire a small current directly-fed projectile with continuous acceleration in an even higher magnetic field, so it is expected that the mass of a single projectile will further increase and the flight distance will be extended.

(Effects of the Invention) According to the present invention, a power supply rail for direct power supply that supplies a large current to the projectile, and an excitation coil for generating eight fields in a direction perpendicular to the current flowing from the power supply rail to the projectile, Since the projectile is accelerated and launched by the combined effect of the power supply current and the magnetic field generated by indirect power supply, the initial startup projectile of direct power supply launch can be launched at higher speeds (accelerated launch).

In addition, the launch tube has a double cylindrical structure, with a cylindrical frame that houses the power supply rail and an outer tube that houses the excitation coil.
It is also possible to strengthen the prevention of deformation due to electromagnetic force or thermal expansion due to thermal temperature rise.

In addition, since the excitation coil for generating the magnetic field can be used in common with the inductor for energy storage, the device can be simplified and the cost can be reduced.

[Brief explanation of drawings]

Fig. 1 is a principle diagram of the electromagnetic emitting device of the present invention, Fig. 2 is a partially cutaway perspective view of the first embodiment of the invention, Fig. 3 is a sectional view of Fig. 2, and Fig. 4 is a diagram of the electromagnetic emitting device of the present invention. A broken perspective view showing a second embodiment,
5 is a sectional view of FIG. 4, FIG. 6 is a broken perspective view showing a third embodiment of the present invention, FIG. 7 is a sectional view of FIG. 6, and FIG. 8 is a fourth embodiment of the present invention. FIG. 9 is a schematic system configuration diagram of an electromagnetic emitting device, and FIG. 9 is a cutaway perspective view showing a fifth embodiment of the present invention. 10 is a sectional view of FIG. 9, and FIG. 11 is a schematic diagram showing an example of a conventional electromagnetic emitting device.

Claims (8)

[Claims] (1) A first and a second space arranged parallel to each other and separated from each other.
between a power supply rail and the first and second power supply rails;
a projectile that is slidably disposed in electrical contact with the projectile; and a direct conductor connected between the first and second power supply rails for passing current through the power supply rails to the projectile; An electromagnetic launcher comprising: a power supply; and an excitation coil that generates a magnetic field in a direction substantially perpendicular to the current flowing through the projectile in a space between the first and second power supply rails. (2) The electromagnetic emitting device according to claim 1, wherein the first and second power supply rails are directly connected in series with a power supply for power supply via an inductor. (3) The electromagnetic emitting device according to claim 1, wherein the first and second power supply rails are directly connected in series with a power supply for power supply via an electromagnetic coil. (4) The electromagnetic firing device according to any one of claims 1 to 3, wherein the electromagnetic coil is a superconducting coil. (5) The first and second power supply rails are loaded into a cylindrical form via an insulator, and the excitation coil is disposed outside the cylindrical form. The electromagnetic firing device according to any one of Items 1 to 4. (6) The electromagnetic emitting device according to any one of claims 1 to 5, wherein the cylindrical form is further surrounded by an outer cylinder. (7) The cylindrical formwork is formed in a drum shape having a surface substantially parallel to a surface including each center line of the first and second power supply rails,
The electromagnetic emitting device according to claim 5 or 6, characterized in that an excitation coil is arranged on the parallel plane. (8) The electromagnetic emitting device according to any one of claims 1 to 7, wherein the excitation coil is constructed by combining large and small coils that are substantially similar in shape.