JP2868950B2 - Flying object accelerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for accelerating a flying object by plasma pressure.

[0002]

2. Description of the Related Art Such a device is used for launching a flying object at a high speed of several kilometers per second, for example, to collide with a material to generate a new material. FIG. 10 is a cross-sectional view showing a configuration example of a conventional flying object acceleration device, and includes a plasma forming unit 1, a boosting unit 2, and a gun barrel 3. The plasma forming part 1 is a part for generating plasma and growing the plasma. The porcelain cylinder 5 is arranged in the iron grounding container 4, and one end of the high-voltage electrode 6 made of iron is inserted into the edge of the hollow part of the porcelain cylinder 5. The other end of the high-voltage electrode 6 is fixed to a hollow metal bolt 9 via an insulating ring 7 and an insulating cylinder 8, and a screw portion 4 </ b> A
It is screwed into and supported. The hollow portion of the porcelain cylinder 5 is an arcing chamber 10, a fuse wire 11 having both ends conductively connected to the high-voltage electrode 6 and the grounding container 4, and a plasma forming body 1 made of a spherical polyethylene material.
2 are filled.

The booster 2 shown in FIG. 10 is a part for increasing the pressure of the plasma generated in the plasma generator 1. The boosting section 2 is composed of an iron fixed container 13 that fixes the grounded container 4 with bolts, and has a vaporization chamber 14 in a hollow portion inside. The vaporizing chamber 14 is filled with an operating body 15 formed into a gel by impregnating water with a water retaining agent made of cellulose. At both ends of the vaporization chamber 14, thin aluminum films 16A and 16B made of aluminum for sealing the working body 15 are stretched.

Further, the barrel 3 shown in FIG. 10 is a portion for accelerating the flying object 17 by receiving the plasma pressure in the vaporization chamber 14. The gun barrel 3 is formed of an iron hollow cylinder, and a projectile 17 is loaded at one end of a gun cavity 18 which is a hollow portion thereof. The direction of the arrow 21 in the barrel 3 is the direction in which the flying object 17 is accelerated, and is fixed to the booster 2 via a screw 18A.

The high-voltage electrode 6 and the grounding container 4 form an electrode pair, and are connected to a power supply 20 via a closing switch 19. When the closing switch 19 is closed, the fuse wire 11 is melted by the electric current and an arc plasma is generated in the arcing chamber 10. The plasma forming body 12 is decomposed by the heat of the arc plasma, and the plasma increases. This plasma breaks the metal film 16 </ b> A due to the pressure and enters the vaporization chamber 14. As a result, the working body 15 is instantaneously gasified and expanded by the high heat of the plasma. The metal film 16 </ b> B is broken by the inflation pressure, and the flying object 17 is pressed and the gun cavity 1 is pressed.
8 accelerates in the direction of arrow 21.

As the plasma forming body 12, a material having a low molecular structure such as a polyethylene material which is easily decomposed and easily forms plasma is used. In addition, as the shape, a spherical or rod-like shape having a diameter of about 100 μm is used. Another well-known accelerator for a flying object is one that presses the flying object by explosion of explosive. However, the explosive power of the explosive can generate a high pressure instantaneously, but when the explosive reaction ends, the power of accelerating the flying object decreases. For this reason, the explosive explosive method has a limit to the firing speed that can be obtained. The method of accelerating the flying object by the plasma pressure as in the apparatus of FIG. 10 is still in the development stage, but depending on the configuration of the apparatus, the type of the plasma forming body or the working body, the expansion pressure of the plasma is increased for a longer time. It has the potential to accelerate the projectile faster than the explosive method. In FIG. 10, the booster 2 is omitted, and the flying object 17 can be accelerated even if the arcing chamber 10 is directly adjacent to the end surface of the flying object 17.

[0007]

However, the conventional device as described above has a problem that the fuse wire is easily detached from the electrode during assembly or transportation of the device. In assembling the apparatus, in FIG. 10, the plasma forming unit 1, the boosting unit 2 and the gun barrel 3 are separately assembled, and after the boosting unit 2 is screwed to the gun barrel 3, the plasma forming unit 1 is inserted and bolted. At this time, the fuse wires 11 were carefully bolted so as not to come off from the electrodes. In addition, the equipment was handled with care during transportation so that no vibration was applied to the equipment. Fuse wire 11
If it comes off, the device must be disassembled and reassembled. Therefore, it was necessary to check the continuity between the electrode pairs before operating the device.

An object of the present invention is to provide a configuration in which a fuse wire is unlikely to come off, and to ensure that the device operates.

[0009]

According to the present invention, there is provided an apparatus for accelerating a flying object by the pressure of a plasma, wherein an igniter in which a fusible element is disposed together with an electrode pair. A plasma forming section filled with a granular or rod-shaped plasma forming body in the arcing chamber, and a gun cavity communicating with the arcing chamber of the plasma forming section via a thin film. And a power supply for supplying a current to the electrode pair, wherein the plasma forming body is made of an insulator covered with a conductive coating having conductivity. Is a fusible member, and in such a configuration, another fusible member fuse wire is disposed in the arcing chamber, and both ends of the fuse wire are conductively connected to each of the electrode pairs.

The present invention also relates to a device for accelerating a flying object by the pressure of plasma, comprising an arcing chamber in which a pair of electrodes and a fuse wire having both ends electrically connected to each of the pair of electrodes are arranged. An arc chamber is filled with a granular or rod-shaped plasma forming body, and a gun cavity communicating with an arcing chamber of the plasma forming unit via a thin film is provided, and a projectile is loaded in the gun cavity. And a power supply for supplying current to the electrode pair, wherein the fuse wire is spirally stretched between the electrode pair.

Further, there is provided an apparatus for accelerating a flying object by the pressure of plasma, comprising an arcing chamber in which a pair of electrodes and a fuse wire having both ends electrically connected to each of the pair of electrodes are provided. An arc chamber is filled with a granular or rod-shaped plasma forming body, and a gun cavity communicating with an arcing chamber of the plasma forming unit via a thin film is provided, and a projectile is loaded in the gun cavity. A plurality of fuse wires are arranged in a gun barrel and a power supply that supplies a current to the electrode pair,
It is assumed that the electrode pair is conductively connected at a plurality of locations.

Further, there is provided an apparatus for accelerating a flying object by the pressure of plasma, comprising an arcing chamber in which a pair of electrodes and fuse wires electrically connected to both ends of the pair of electrodes are arranged. A plasma forming part filled with a granular or rod-shaped plasma forming body in the arcing chamber,
A gun cavity communicating with the arc chamber of the plasma forming unit via a thin film, a gun barrel having a projectile loaded in the gun cavity, and a power supply for supplying a current to the electrode pair The fuse wire includes a plurality of branch fuse wires branching from the middle, and each tip of the branch fuse wire comes into contact with one of the electrode pairs.

Further, there is provided an apparatus for accelerating a flying object by the pressure of plasma, comprising an arcing chamber in which a fuse wire is arranged together with an electrode pair, wherein a granular or rod-shaped plasma forming body is provided in the arcing chamber. And a gun cavity communicating with an arc chamber of the plasma formation unit via a thin film, and a current supply is supplied to a gun barrel having a projectile loaded in the gun cavity and the electrode pair. The fuse wire has a length equal to or greater than the separation distance between the electrode pairs in the arcing chamber, and one end of the fuse wire is conductively connected to one of the electrode pairs. Is arranged so as to be less than a predetermined gap length from the other electrode of the electrode pair, and the power supply outputs a voltage capable of causing dielectric breakdown of the predetermined gap.

[0014]

According to the present invention, the plasma forming body is made of an insulator covered with a conductive coating having conductivity, and this conductive coating is made a fusible material. With this configuration, an electric current flows through the conductive film to generate arc plasma. For this reason, unlike the conventional device, the malfunction in which the fuse wire is disconnected and the conduction between the electrodes is lost is eliminated, and the device operates reliably.

In this configuration, another fusible fuse wire is disposed in the arcing chamber, and both ends of the fuse wire are conductively connected to the respective electrode pairs. With this configuration, even if the fuse wire comes off during assembly or transportation of the device, the conductive film becomes a fusible material, so that the device operates reliably. Further, instead of covering the plasma forming body with the conductive film, a fuse wire is spirally stretched between the electrode pairs. With this configuration, stress applied to the junction between the fuse wire and the electrode is reduced, and the fuse wire is less likely to come off even if the device is subjected to vibration. As a result, the device operates reliably.

Further, instead of making the above fuse wire spiral, a plurality of fuse wires are provided and conductively connected to the electrode pair at a plurality of locations. With this configuration, even if a part of the fuse wire is detached from the electrode pair, the remaining fuse wire generates arc plasma, so that the device operates reliably. Furthermore, instead of arranging a plurality of the above fuse wires, a plurality of branch fuse wires are provided in which the fuse wires are branched from the middle. The tip of each of the branch fuse wires is brought into contact with one of the electrodes. With this configuration, even if the fuse wire is displaced from the electrode pair, an arc plasma is generated because one of the branch fuse wires is in contact with the electrode pair. As a result, the device operates reliably.

Furthermore, instead of the fuse wire having the branch fuse wire described above, the length of the fuse wire is set to be equal to or greater than the distance between the electrode pairs in the arcing chamber, and one end of the fuse wire is connected to one of the electrode pairs. Conductive connection,
The other end of the fuse wire is arranged so as to be shorter than a predetermined gap length from the other electrode of the electrode pair. When the power supply outputs a voltage capable of causing dielectric breakdown in the predetermined gap, a current flows between the electrode pairs via the fuse wires when the power supply is turned on. This current blows the fuse wire and generates arc plasma, so that the device operates reliably.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
FIG. 1 is an enlarged sectional view of a main part showing a configuration of a flying object accelerator according to an embodiment of the present invention. The plasma forming body 22 filled in the arcing chamber 10 is formed of a spherical polyethylene material covered with a conductive coating having conductivity.
Other configurations are the same as those in FIG. 10, and the same components are denoted by the same reference numerals and detailed description thereof will be omitted. Since the plasma forming bodies 22 are in contact with each other, even if the connection between the fuse wire 11 and the high-voltage electrode 6 or the grounding container 4 is disconnected, a current flows through the conductive coating. As a result, the conductive film is melted and arc plasma is generated, and the device operates reliably.

FIG. 2 is an enlarged sectional view of a main part showing the structure of a flying object accelerating device according to another embodiment of the present invention. The plasma forming body 23 is made of a cylindrical polyethylene material covered with a conductive film, and the directions thereof are randomly filled in the arcing chamber 10. Other configurations are the same as those of FIG. FIG. 3 is an enlarged sectional view of a main part showing a configuration of a flying object acceleration apparatus according to still another embodiment of the present invention. The plasma forming bodies 24 have a columnar shape and are arranged in parallel with the axial direction of the arc chamber 10. FIG. 4 is a sectional view taken along line XX of FIG. 3, in which each of the plasma forming bodies 24 is covered with a conductive film. In the embodiments shown in FIGS. 2 and 3, since the plasma forming bodies are in contact with each other as in the case of FIG. 1, even if the fuse wire 11 is disconnected, the conductive film becomes a soluble body and arc plasma is generated. The device works reliably.

The conductive film of the plasma forming body in the embodiment shown in FIGS. 1 to 3 is, for example, H in the case of a metal film.
g, Bi, Pb, Au, Cu, etc. are formed by vapor deposition.
The conductive film need not be metallic and may be formed of an organic conductive material to which graphite is added, or may be formed of a conductive polymer such as polyacetylene. FIG. 5 is an enlarged sectional view of a main part showing a configuration of a flying object accelerating apparatus according to still another embodiment of the present invention. The only difference from the configuration of FIG. 1 is that the fuse wires have been removed. Since the plasma forming body 22 has conductivity, an arc plasma is generated even without a fuse wire. Therefore, without worrying about the fuse wire coming off,
The device can be assembled and transported, and the device operates reliably.

FIG. 6 is an enlarged sectional view of a main part showing the structure of a flying object accelerating apparatus according to still another embodiment of the present invention. A fuse wire 25 is spirally stretched between the electrodes of the arc chamber 10. The other configuration is the same as that of the conventional apparatus of FIG. With this configuration, the stress applied to the joint between the fuse wire 25 and the high-voltage electrode 6 or the grounding container 4 is reduced, so that the fuse wire 25 is less likely to come off even if the device is subjected to vibration. As a result, the device operates reliably.

FIG. 7 is an enlarged sectional view of a main part showing the configuration of a flying object accelerating apparatus according to still another embodiment of the present invention. While two fuse wires 26 are arranged,
It is joined to the grounding container 4 at different places. Other configurations are the same as those in FIG. With this configuration, even if one of the fuse wires 26 comes off the grounding container 4, the remaining fuse wires 26 are blown to generate arc plasma, so that the apparatus operates reliably. The greater the number of the fuse wires 26, the higher the reliability. Also,
The junction with the high voltage electrode 6 may also be different from each other.

FIG. 8 is an enlarged sectional view of a main part showing the structure of a flying object accelerating apparatus according to still another embodiment of the present invention. The fuse wire 27 is provided with a plurality of branch fuse wires 27A branched from the middle. Ground container 28
Has a cylindrical shape so as to form a radial inner wall of the arcing chamber 10, and is insulated from the high-voltage electrode 6 via the porcelain cylinder 29. Each end of the branch fuse wire 27A is arranged so as to contact the inner wall surface of the ground electrode 28. Other configurations are the same as those in FIG. With this configuration, even if the fuse wire 27 is detached from the grounding container 28, any one end of the plurality of branch fuse wires 27A is in contact with the grounding container 28, so that the device operates reliably.

FIG. 9 is an enlarged sectional view of a main part showing the configuration of a flying object accelerating apparatus according to still another embodiment of the present invention. The length of the fuse wire 30 is set to be equal to or longer than the separation distance L of the electrode pair in the arc chamber 10. The fuse wire 3
The fuse wire 30 is inserted into the insulating tube 31 so as to maintain a straight line, and is disposed at a position substantially at the center of the arc chamber 10 in the axial direction. The other configuration is the same as that of FIG. With such a configuration, the distance between the fuse wire 30 and the grounding container 4 in the arcing chamber 10 is always maintained at a predetermined distance D or less. That is, D is maximum when the fuse wire 30 is located at the center of the axis of the arc chamber 10, and D decreases as the position deviates from the center of the axis. If an output voltage that can cause dielectric breakdown at the predetermined distance D is output from the power supply, the fuse wire 3
The current always flows to zero and the device operates reliably. With this configuration, the vibration stress applied to the joint of the fuse wire 30 is reduced, and there is no need to worry about the fuse wire 30 coming off the electrode pair.

[0025]

According to the present invention, as described above, since the plasma forming body is an insulator covered with a conductive coating, the conductive coating replaces a fusible material such as a fuse wire which is easily detached, so that the apparatus operates reliably. Become like In such a configuration, another fuse wire, which is a fusible member, is disposed in the arcing chamber, and both ends of the fuse wire are conductively connected to the respective electrode pairs. With this configuration, the device operates reliably even if the fuse wire comes off the electrode.

Also, instead of covering the plasma forming body with a conductive film, a fuse wire is spirally stretched between the electrode pairs. With this configuration, the fuse wire is less likely to come off, and the device operates reliably. Further, instead of making the fuse wire spiral, a plurality of fuse wires are arranged and conductively connected to the electrode pair at a plurality of locations. With this configuration, even if a part of the fuse wire is disconnected, the remaining fuse wire is blown, so that the device operates reliably.

Further, instead of arranging a plurality of fuse wires, a plurality of branch fuse wires branched from the middle are provided in the fuse wire. With this configuration,
If one of the branch fuse wires is in contact with the electrode pair even if the fuse wire comes off the electrode pair, the device operates reliably. Furthermore, instead of the fuse wire having a branch fuse, one end of the fuse wire is bonded to the electrode, and the other end of the fuse wire is arranged so as to keep the other electrode at a predetermined gap length or less. With this configuration, the applied voltage causes a dielectric breakdown in the predetermined gap, and a fusing current flows through the fuse wire, so that the device operates reliably.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part showing a configuration of a flying object accelerator according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part showing a configuration of an accelerator according to another embodiment of the present invention;

FIG. 3 is an enlarged sectional view of a main part showing a configuration of an accelerator according to still another embodiment of the present invention.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is an enlarged sectional view of a main part showing a configuration of an accelerator according to still another embodiment of the present invention.

FIG. 6 is an enlarged sectional view of a main part showing a configuration of an accelerator according to still another embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a main part showing a configuration of an accelerator according to still another embodiment of the present invention.

FIG. 8 is an enlarged sectional view of a main part showing a configuration of an accelerator according to still another embodiment of the present invention.

FIG. 9 is an enlarged sectional view of a main part showing a configuration of an accelerator according to still another embodiment of the present invention.

FIG. 10 is a sectional view showing a configuration example of a conventional accelerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 Grounding container 28 Grounding container 5 Porcelain cylinder 29 Porcelain cylinder 6 High-voltage electrode 10 Arc chamber 11 Fuse wire 25 Fuse wire 26 Fuse wire 27 Fuse wire 30 Fuse wire 27A Branch fuse wire 12 Plasma former 22 Plasma former 23 Plasma former Reference Signs List 24 Plasma forming body 13 Fixed container 14 Vaporization chamber 15 Working body 16A Metal film 31 Insulating tube

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Norihiro Hiroshige 1-1-1, Tanabe-Nita, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (72) Inventor Kenji Murata 2-34, Rokunuyama, Taketoyo-cho, Chita-gun, Aichi Prefecture No. (72) Inventor Takaaki Fukuda 11th, Ishida, Fuki, Taketomi-cho, Chita-gun, Aichi Prefecture 40 (72) Inventor Yukio Kato 8 West Gate, Taketoyo-cho, Chita-gun, Aichi Prefecture (56) References JP-A-2-2 64400 (JP, A) JP-A-4-217797 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F42B 5/08 F41B 6/00

Claims (6)

(57) [Claims] An apparatus for accelerating a flying object by the pressure of plasma, comprising an arcing chamber in which a fusible body is arranged together with an electrode pair, wherein a granulated or rod-shaped plasma forming body is provided in the arcing chamber. A charged plasma forming part, a gun cavity communicating with an arcing chamber of the plasma forming part via a thin film, a gun barrel having a projectile loaded in the gun cavity, and supplying a current to the electrode pair A flying object accelerator, comprising a power source, wherein the plasma forming body is made of an insulator covered with a conductive film having conductivity, and the conductive film is a fusible material. 2. A fuse wire according to claim 1, wherein another fuse wire as a fusible material is disposed in the arc chamber, and both ends of the fuse wire are conductively connected to each of the electrode pairs. Flying object accelerator. 3. An apparatus for accelerating a flying object by the pressure of plasma, comprising an arcing chamber in which a pair of electrodes and fuse wires electrically connected to both ends of the pair of electrodes are disposed. An arc chamber is filled with a granular or rod-shaped plasma forming body, and a gun cavity communicating with an arcing chamber of the plasma forming unit via a thin film is provided, and a projectile is loaded in the gun cavity. And a power supply for supplying a current to the electrode pair, wherein the fuse wire is spirally stretched between the electrode pair. 4. An apparatus for accelerating a flying object by the pressure of plasma, comprising an arc chamber in which a pair of electrodes and fuse wires electrically connected to both ends of each of said pair of electrodes are provided. An arc chamber is filled with a granular or rod-shaped plasma forming body, and a gun cavity communicating with an arcing chamber of the plasma forming unit via a thin film is provided, and a projectile is loaded in the gun cavity. And a power supply for supplying a current to the electrode pair, wherein a plurality of the fuse wires are arranged, and the fuse wire is conductively connected to the electrode pair at a plurality of locations. Body accelerator. 5. An apparatus for accelerating a flying object by the pressure of plasma, comprising an arc chamber in which a pair of electrodes and fuse wires electrically connected to both ends of each of said pair of electrodes are disposed. An arc chamber is filled with a granular or rod-shaped plasma forming body, and a gun cavity communicating with an arcing chamber of the plasma forming unit via a thin film is provided, and a projectile is loaded in the gun cavity. And a power supply for supplying a current to the pair of electrodes, the fuse wire includes a plurality of branch fuse wires branching from the middle, and each tip of the branch fuse wire has one of the electrode pairs. An accelerator for a flying object characterized by being in contact with one of them. 6. An apparatus for accelerating a flying object by the pressure of plasma, comprising an arcing chamber in which a fuse wire is disposed together with an electrode pair, wherein a granulated or rod-shaped plasma forming body is provided in the arcing chamber. A charged plasma forming part, a gun cavity communicating with an arcing chamber of the plasma forming part via a thin film, a gun barrel having a projectile loaded in the gun cavity, and supplying a current to the electrode pair And a power source, wherein the fuse wire has a length equal to or greater than the separation distance of the electrode pair in the arcing chamber, and one end of the fuse wire is conductively connected to one of the electrode pairs, and The other end of the flying object is arranged so as to be shorter than a predetermined gap length from the other electrode of the electrode pair, and the power supply outputs a voltage capable of causing dielectric breakdown of the predetermined gap.