JPH02106698A - Electromagnetic acceleration device - Google Patents

Abstract

PURPOSE:To enable reduction of incurring of the Joule loss of a rail part by a method wherein a pair of rails have a double structure type rail in which a rail inner layer formed by a conduction material and a rail outer layer formed by a superconduction material are adhered to each other for bonding. CONSTITUTION:An ordinary conduction material is used for inner layer rails 1 and 2, and outer layer rails 3 and 4 formed by a superconduction material is adhered and bonded to the respective inner layer rails. In prior to operation, the outer layer rails 3 and 4 formed by the superconduction material are cooled to temperature lower than a critical temperature intrinsic to the material and brought into a superconduction state. A current I flows through a source circuit system and the outer layer rail 3 under a superconduction state, and flows through an armature 7 after the passage of it through the inner layer rail 1 in a position in the vicinity of the armature 7 mounted to a flying body 6. Further, the current flows through the outer layer 4 under a superconduction state to the original power circuit system after the flow of it through the inner layer rail 2 on the opposite side. In this case, regardless of the position of the flying body 6 (independently of the magnitude of L), a Joule loss in rail structure during energization is only that incurring during the flow of it across the parts, having a thickness (t), of the inner layers 1 and 2 and that incurring at the armature 7.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a railgun type electromagnetic accelerator.

[Conventional technology]

FIG. 4 shows a principle diagram of a conventional rail gun type single magnetic accelerator. In other words, a pair of four-legged rails 14.1 in Figure 4.
A flying object 6 is installed between 5 and fj! of the flying object 6. In this state, an armature 7 made of a conductive material is installed at the base (if the flying object is made of a conductive material, an armature is not required). 6, and based on the interaction of this magnetic field B and the flow force flowing through the armature 7, <gtd force F (F=I xB) causes the projectile 6 to have a blade velocity in the direction , obtain the required quick reaction V.

Therefore, when dual-speed injection is required, the -th pole surface has a through hole of t.
'It is necessary to increase the size of the 4th line and increase the length of the rail 14.15.

Note that FIG. 4 is for explaining the acceleration principle, and the reinforcement structure against electromagnetic force acting on the rails 14 and 15 themselves, the insulation structure between the rails 14 and 15, the cooling structure, etc. are not shown. Not yet.

[Problem to be solved by the invention]

When ejecting the flying object 6, the power source energy should be efficiently provided as kinetic energy to the flying object, but various energy losses occur.

Among these, the Joule loss in the rails 14 and 15 is the largest one. At the early stage of acceleration shown in Figure 5(,), the energizing distance in the rail is short, so the joule loss is small, but in the late acceleration period shown in Figure 5(b), the energizing distance [exist]) is insufficient and υ joule loss. is large.

Therefore, when determining the velocity of projectile 60 shot, rail 1
4. The length of 15 becomes longer and Zeal Detective becomes larger. A detailed example of the test is shown in Figure 6. The vertical axis in FIG. 6 represents the noll loss/projectile kinetic energy when a general copper rail is used to accelerate the missile at a constant velocity and constant velocity, and the horizontal axis @ represents the ejection mode. According to Figure 6, when high speed is required,
It is clear that an efficient system cannot be achieved without taking measures against the source.

As one such measure, there is a multi-stage acceleration system as shown in FIG. This is not a long rail 14-1.
From 15-1 to 14-rs and 15n, the rail structure is substantially long, and from the viewpoint of reducing the number of joules, the current conduction distance (6) illustrated in FIG.

However, in this case, there are many factors that impede smooth movement of the flying object 6, such as the structure of the multi-stage connecting portion and the height of the height of the installation height, and it is necessary to adjust these factors.

[Failure to solve the problem]

(1) An electromagnetic accelerator according to a first aspect of the present invention is an electromagnetic accelerator comprising a pair of rails, an area source connected to the rails, and a switch system, in which the pair of rails has a rail inner layer 41 made of a material. It is characterized by a double grooved rail in which the outer layer of the rail made of superconducting material is closely bonded.

(2) The fly accelerator according to the second invention is characterized in that, in the apparatus J/l according to the first invention, a cooling passage is provided between the inner layer rail and the outer layer rail.

(3) The electromagnetic 71i 1-speed loading tray according to the third aspect of the present invention is
In the device according to the invention, the outer layer rail and the super-lowered 4'!
The sword storage device, the superconducting cable, and the superconducting Mizukudensho switch are connected together, and the outer layer rail, the superconducting cable, and the superconducting Mizukudensho switch are connected so as to be short-circuited.

(4) The electromagnetic accelerator according to the fourth non-invention is the device manifested in the second non-invention, which includes an outer layer rail, a superconducting force storage device, a superconducting cable, and a superconducting water flow switch. It is characterized by a maze that connects the outer layer rail, the superconducting cable, and the superconducting permanent NL flow switch.

[Effect]

The non-inventiveness is (1) the use of a two-layer rail in which an outer layer rail made of a super-flat material is bonded to the outside of an inner layer rail made of a conductive material (equivalent to a conventional rail), so the rail part is Nord fjt fC will be significantly lower.

2) The stabilization of superconductivity can be increased by providing cooling passages to completely prevent the superconducting outer l-rail from quenching due to any thermal disturbances.

(3) Since a full-system superconducting system is adopted that employs a superconducting power storage device, a superconducting cable, and a superconducting permanent 1i current switch, the conspicuousness of the design layout increases.

〔Example〕

FIG. 1 shows the basic structure of the device of the present invention. The normal 44 material is used for the Norrail 1.2, and outer layer rails 3 and 4 made of superconducting material are attached to the outer layer rails 3 and 4. Prior to operation, the outer layer rails 3 and 4 made of a superconducting material are cooled to a critical temperature (T (J) or less unique to that material) to a superconducting state. (The cooling structure is not shown.) Figure 2 shows a flying object. Let us take two points as representative examples, including the early and late stages of the acceleration motion of 6.A) and (bJ). In the vicinity of the armature 7 attached to the flying object 6, it passes through the inner layer rail 1 and then through the armature 7.Furthermore, with the inner layer rail 2 on the opposite side, the outer layer in the Mi conducting state is
A small amount flows through rail 4 to the original tunyuan circuit system. As can be understood from this (b), no matter where the flying object 6 is located (regardless of the size of L), the difference in the rail structure when energized is the same.

Losses that occur when crossing the thickness (1) of the inner rail 1.2 and the armature? Only those that occur in Therefore, when high-speed injection is required and the rail length is long, the effect of reducing 4<joule loss in the apparatus of the present invention is extremely large.

Therefore, there is no need for a multi-tiered rail structure as in the conventional scheme (FIG. 7), and the problems caused by the multi-tiering as described above do not occur.

FIG. 1(e) shows another embodiment of the present invention, in which a charging passage 5 is entirely formed between the inner layer rail and the outer layer rail. The outer I-rails 3, 4 which are in a superconducting state may be quenched due to thermal disturbances, and this occurrence makes it impossible to continue operating the system. Therefore, even if normal conduction transition should occur, it must be suppressed so that it does not expand or propagate, and it must be returned to superconductivity. '4di accelerator K (in the case of a rail gun, the biggest sources of the above thermal disturbance are the Joule loss in the inner rails 1 and 2, and the sliding between the projectile 6 and armature 7 and the inner rail 1°2). In order to prevent thermal disturbances from entering these outer layer rails 3 and 4, a cooling passage 5 having a sufficient amount of heat removal to maintain the superconducting state is provided. , improve the operational reliability of the system.

Figure 3 shows an electromagnetic accelerator fit (railgun) that uses the aforementioned two-layer structure rail, and employs a superconducting power storage device 8 as its energizing device, and connects it to the outer layer rails 3 and 4. A superconducting cable 9 that connects the two, a superconducting permanent'dL flow switch 10, and a superconducting cable 11 that short-circuiting the outer layer rails 3 and 4. LL flow switch 1
This is a system with 2. The system is operated according to the following steps. With the permanent current switch 12 closed and the permanent current switch 0 open, light is emitted from the external power source 13 to the superconducting power storage device f8. Permanent upon completion of photoelectric
Close the flow switch 10, gradually disconnect the external source 13, and switch to permanent 1st flow mode (8→lθ→3→12→11→
Persistent current of 4 → 9 → 8). Permanently in this state
By opening the undercurrent switch 12, the current accelerates the flying object 6 in the discharge mode (8→1o→3→1-47→2→4→9→8).

With this system, it is possible to further reduce the collapse of the system as a whole, and it is possible to enhance the effect of adopting the above-mentioned Nino Denzo type rail. In addition, when using a normal conduction cable or 11L source system, 1.
It was necessary to arrange the power supply as close as possible to the rail structure, but by using a conduction system as in the present invention, the degree of freedom in arrangement design is increased, rather than being impaired.

〔Effect of the invention〕

Since the device of the present invention has the above-mentioned configuration formula, it produces the following effects.

■ Joule loss in the rail section can be reduced, and the togen-yodo can be made smaller. Also, even if a long rail is required, it can be made into a four-tiered rail.

■ The stability of superconductivity will increase, making the device more reliable.

■ The joule loss of the entire system can be reduced, and the source and valley amount can be reduced by one no. In addition, the problem with layout design increases.

[Brief explanation of drawings]

Fig. 1 is a diagram illustrating the original mass of the device of the present invention, Fig. 2 is a diagram illustrating that the strength and control of the device of the present invention does not depend on distance, and Fig. 3 is another embodiment of the present invention. For example, the system diagram shows that the entire system is superconducting, including the '1 power supply path. Figure 4 shows the original mass of the conventional rail gun type electromagnetic/Jil stray device. Figure 5 shows the conventional rail structure. Figure 6 shows an example of how Joule loss increases with distance LK.
X t'll 'c 73'("1.j, Figure 7 is a diagram showing a conventional multi-stage device system. 1.2... Inner layer rail, 3, 4... Outer layer rail, 5
...Cooling passage, 6... Flying object, 7... Armature, 8... Superconducting power storage device, 9.11... Superconducting cable, 10.12... Superconducting persistent current switch ,
13...Outer m1t (II,! 4, 15...Rail, 16...Cable (Genden 4), Noah...Switch (Genden 4)%14-1~No4-n,No5- No~is
-rr-・Rail (multi-stage), 16-1 to 16-n・
・・Cable (Genden 4)% 17-1~17-n・・
・Switch (Genden 4), 1B-1~1g-n-'11m
. Takehiko Suzue (a) (b) Figure (a) Injection speed ff1l [kI-n/s] Figure (a) Figure (b))

Claims (4)

[Claims] (1) In an electromagnetic accelerator consisting of a pair of rails and a switch system connected to the rails, the pair of rails has a double structure in which an inner rail layer made of a conductive material and an outer rail layer made of a superconducting material are tightly bonded. An electromagnetic accelerator characterized by having a type rail. (2) The electromagnetic accelerator according to claim 1, characterized in that a cooling passage is provided between the inner layer rail and the outer layer rail. (3) The outer layer rail, the superconducting power storage device, the superconducting cable, and the superconducting persistent current switch are connected, and the outer layer rail, the superconducting cable, and the superconducting persistent current switch are connected so as to be short-circuited. The electromagnetic accelerator according to claim 1. (4) The outer layer rail, the superconducting power storage device, the superconducting cable, and the superconducting persistent current switch are connected to each other, and the outer layer rail, the superconducting cable, and the superconducting persistent current switch are connected to short-circuit each other. The electromagnetic accelerator according to claim 2.