JP3281897B2 - Fine particle accelerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fine particle accelerator.

[0002]

2. Description of the Related Art In order to measure the strength of a material against impact and the like, an impact test or the like in which a material (flying object) collides with the material at a high speed is performed.

Conventionally, as a device for accelerating a flying object, there are an explosive type, a compressed air type, and an electric heating accelerator.

As shown in FIG. 3, the electrothermal accelerator has electrodes 2 and 3 disposed at a rear end and an intermediate portion of an accelerating cylinder 1 made of an insulating material. A circuit 6 having a high-current power supply 5 is connected, and a ring-shaped evaporating member 7 made of an insulating material having a low evaporation temperature is inserted and arranged inside the accelerating cylinder 1. Is loaded and the switch 4 is turned on to generate a discharge between the electrodes 2 and 3 at the rear of the firing cylinder, and the heat of the discharge causes the evaporating member 7 to evaporate.
The flying object 8 is accelerated and fired from the tip of the acceleration cylinder 1.

[0005] Each of the accelerators described above has a small flying object 8.
In order to launch the projectile, since there is a limit in the production of the diameter of the acceleration cylinder 1, a sabot 9 having a size that is easy to handle is formed as shown in FIG. , The sabo 9 and the flying object 8 are simultaneously accelerated, and the sabo 9 is decelerated and stopped by a sabo separating device 11 having a steel-made tapered internal space 10 attached to the tip of the acceleration cylinder 1. The flying object 8 is separated from the sabot 9 by inertia, and only the flying object 8 is fired.

[0006]

However, the above-mentioned conventional fine particle accelerator has the following problems.

[0007] That is, although the sabot 9 is used to fire the minute flying object 8, the flying object 8 that can be mounted on the sabot 9 is used.
There is no limit to the size of the device, and there has not yet been a small device capable of efficiently emitting extremely fine particles having a size of millimeters or less as a flying object 8 at a speed of about kilometers per second.

The present invention has been made in view of the above circumstances, and has as its object to provide a fine particle accelerator capable of emitting fine particles at high speed.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a polyethylene
At the tip of the accelerating cylinder of an accelerator that accelerates a solid mass made of a polymer material such as nylon or nylon, a compression pressure increasing portion with a throttle that increases the compression pressure inside the solid mass by collision is provided, and at the tip of the compression pressure increasing portion The present invention also relates to a fine particle accelerator, wherein a nozzle hole for separating a part of a solid mass by a compression pressure increased by the collision and emitting fine particles is formed.

[0010]

The operation of the present invention is as follows.

When the solid mass is accelerated by using the acceleration device, the solid mass collides with the throttle portion of the compression pressure increasing portion provided at the tip of the acceleration cylinder, and the internal compression pressure is increased.

Then, the solid mass is partly separated from the solid mass by the increased compression pressure, and is emitted as fine particles from a nozzle hole provided at the tip of the compression pressure increasing portion.

By doing so, polyethylene
Part of the solid mass itself made of
Since the fine particles are fired at a distance, the fine particles can be fired at a higher speed than the solid mass accelerated by the accelerator.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of the present invention.

In the drawing, reference numeral 1 denotes an explosive type, a compressed air type,
An accelerating cylinder 12 of an accelerating device such as an electrothermal accelerating device, and 12 is a solid mass made of a polymer material such as polyethylene or nylon accelerated by the accelerating device.

At the tip of the acceleration cylinder 1 of the flying object accelerator for accelerating the solid mass 12, a compression pressure increasing portion 14 having a throttle portion 13 is provided. The nozzle hole 16 having substantially the same diameter as that of the nozzle hole 16 is formed.

Reference numeral 17 denotes a gas vent hole formed in the compression pressure increasing portion 14.

Next, the operation will be described.

When the solid mass 12 made of a polymer material is accelerated as shown in FIG. 1 by using an accelerating device such as an explosive type, a compressed air type, or an electric heating accelerator, the solid mass 12 As shown in FIG.
3 and is compressed while being deformed according to the squeezed portion 13.

Then, in the solid mass 12, elastic compression waves generated when the compression pressure is increased by collision are reduced.
And a pulsed pressure is generated.

A part of the solid mass 12 itself is separated by the pulsed pressure and emitted as fine particles 15 from the nozzle hole 16.

When the fine particles 15 are fired in this manner, the fine particles 15 can be fired at a higher speed than the speed of the solid mass 12 accelerated by the accelerator.

It should be noted that the present invention is not limited only to the above-described embodiment, and it is needless to say that various changes can be made without departing from the scope of the present invention.

[0025]

As described above, according to the microparticle accelerator of the present invention, the polymer material of polyethylene or nylon is used.
Launches microparticles by separating a part of the solid mass itself
Higher speed than the solid mass accelerated by the accelerator
Thus, an excellent effect that fine particles can be fired can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view of one embodiment of the present invention.

FIG. 2 is an operation diagram of FIG. 1;

FIG. 3 is a schematic side sectional view of the electrothermal accelerator.

FIG. 4 is a schematic side sectional view of a sabo separation device attached to a tip of an acceleration cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Acceleration cylinder 12 Solid mass 13 Throttle part 14 Compression pressure increase part 15 Fine particle 16 Nozzle hole

──────────────────────────────────────────────────続 き Continuing from the front page Examiner ▲ Taka ▼ Shigeo Mi (56) References Yoshida, Agematsu, Mihashi, Ohama “High-speed launch of microparticles with an ET gun (electrically heated accelerometer)” The 42nd Symposium on Applied Mechanics (58) Surveyed field (Int.Cl. ⁷ , DB name) G01M 7/08 G01N 3/30 JICST file (JOIS)

Claims (1)

(57) [Claims] 1. A polymer material such as polyethylene or nylon.
At the tip of the acceleration cylinder of the accelerating device that accelerates the formed solid mass, a compression pressure increasing portion having a throttle portion that increases the compression pressure inside the solid mass by collision is provided, and at the tip of the compression pressure increasing portion, the compression increased by the collision. A microparticle accelerator, wherein a nozzle hole for separating a part of a solid mass by pressure and firing microparticles is formed.