JPH03247996A - Igniting device for missile launching device - Google Patents

Abstract

PURPOSE:To keep safety and shorten a time necessitated for pressurizing by a method wherein an igniting chamber, independent from a combustion chamber, is provided and relation between the igniting chamber and the combustion chamber is permitted to be opened and/or closed by a valve device while a force in the closing direction of the valve is applied to set a characteristic, in which the valve is opened by the pressure of combustion gas generated by ignition. CONSTITUTION:A pressurizing device 6 is connected to a pressurizing gas supplying port 6a and a stop valve is provided between the pressurizing gas supplying port 6a and the pressurizing device 6. An igniting fuel supplying device 28, capable of supplying igniting fuel 20, is connected to a fuel passage 28a. A valve always closing mechanism, operating the valve device 4 for an igniting chamber to always closed side by a pressurizing chamber 10 and a spring 12, is constituted. A pushing force, applied on an valve body 4a by the spring 12 and the pressure of the pressurizing chamber applied on a pressure receiving unit 4c, is larger than a push-up force, applied on the lower end surface of the valve body 4a by a pressure in an igniting chamber 2, however, it is designed so as to be smaller than a push-up force applied on the valve body 4a by combustion gas pressure generated when the igniting fuel 20 in the igniting chamber 2 is ignited.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an ignition device for a flying object launcher that launches a flying object using the pressure of combustion gas obtained by burning liquid fuel.

(b) Prior Art A conventional projectile launcher is shown in FIG. The projectile launcher includes a cylindrical gun barrel 30, an injection piston 32 attached to the inner diameter of the barrel, an ignition chamber 33 provided in the gun barrel 30, and ignition fuel 45 in the ignition chamber 33. and a pressurizing device 36 that applies pressure to the combustion chamber 40 and the ignition chamber 33. A combustion chamber 40 is formed by the inner diameter of the gun barrel 30, the injection piston 32, and the flying object 38 loaded in the gun barrel 30. The ignition chamber 33 and the combustion chamber 40 are always in communication. The space on the opposite side of the injection piston 32 from the combustion chamber 40 side is the fuel chamber 4
2, and this space is filled with liquid fuel 44. The injection piston 32 includes a combustion chamber 40 and a fuel chamber 42.
A flow path 46 is provided that communicates with the two. Pressure device 36
The combustion chamber 40 and the ignition fuel 45 in the ignition chamber 33 are pressurized. When the ignition device 34 ignites the ignition fuel 45 in the ignition chamber 33, combustion gas is generated, and this pressure pushes out the flying object 38 and pushes the injection piston 32, causing the liquid fuel 44 in the fuel chamber 42 to be ignited. is pushed out into the combustion chamber 40 and explodes and burns. This generates a large amount of combustion gas, accelerates the flying object 38, and the projectile 38 is ejected from the gun cavity at high speed.

(c) Problems to be Solved by the Invention As shown in FIG. 6, the greater the pressure P applied to the ignition fuel 45, the smaller the energy E required for ignition. It is being done. However, in the conventional projectile launcher as described above, it is necessary to pressurize the entire combustion chamber 40 as well as the ignition chamber 33. For this reason, from the pressurizing device 36 to the combustion chamber 40
When pressure is applied inside, the flying body 38 may be pushed out, which poses a safety problem. Also, ignition fuel 4
Since the combustion chamber 40 is pressurized before ignition, the injection piston 32 may start to move due to this pressure. Furthermore, since the combustion chamber 40, which has a large volume, is pressurized, it takes time to pressurize it, and there is a problem that the number of firings cannot be increased. The present invention aims to solve these problems.

(d) Means for Solving the Problems The present invention provides an ignition chamber independent of the combustion chamber, and enables opening and closing between the ignition chamber and the combustion chamber by a valve device for the ignition chamber,
The ignition fuel supplied into the ignition chamber is pressurized in a state where the ignition is closed, and a force is applied in the direction of closing the valve so that the valve does not open due to this pressurizing force, thereby reducing the combustion gas generated by ignition. The above problem is solved by configuring the valve so that the force used to open the valve is greater than the force used to close it. That is, the present invention includes an ignition chamber (2) and an ignition mechanism (22) that ignites the ignition fuel (20) in the ignition chamber (2), and directs the combustion gas generated by the ignition to the gun barrel (30). The present invention is intended for an ignition device of a flying vehicle launcher that is introduced into a combustion chamber (40) of a vehicle, and includes an ignition chamber valve device (4) that can open and close an ignition chamber (2);
A pressurizing device (6) capable of supplying pressurized gas at a predetermined pressure into the ignition chamber (2) through pressurized gas passages (14c, 14d), and a pressurized gas passage capable of opening and closing the pressurized gas passage (14d). The normally closed valve mechanism (10, 12) includes a valve device (8) for the ignition chamber, and a normally closed valve mechanism (10, 12) that operates the valve device (4) for the ignition chamber to the normally closed side. It is set to have a characteristic that it does not open depending on the pressurized gas pressure supplied to the ignition chamber (2), but opens depending on the combustion gas pressure.

Note that the normally closed valve mechanism (10 and/or 12) can use either one or both of gas pressure (IO) and a spring (12). Note that the symbols in parentheses indicate corresponding members in the embodiments described later.

(E) Supply a predetermined amount of fuel into the ignition chamber from the operational fuel supply device, open the pressurized gas passage valve device, and introduce pressurized gas from the pressurization device into the ignition chamber. The pressurized gas passes through the pressurized gas passage, pressurizes the ignition fuel in the ignition chamber, and enters the pressurized chamber to press the valve of the ignition chamber valve device toward the valve seat.

In this state, the ignition mechanism is activated to generate an arc.

As a result, the ignition fuel in the ignition chamber turns into high-temperature combustion gas, increasing the pressure in the ignition chamber and pushing up the valve.

Combustion gases are conducted between the valve and the valve seat through a passageway into the combustion chamber of the gun barrel. As a result, the fuel in the combustion chamber is ignited and burned explosively, and combustion gas is injected toward the rear end of the projectile contained within the gun barrel, causing the projectile to be launched from the gun barrel at high speed. The valve is seated in its seat by the pressurized gas pressure trapped in the pressurized chamber, allowing it to be ready for ignition for the next projectile launch.

The force pushing the valve of the ignition chamber valve device toward the valve seat is
Although pressure can be used, spring force may be used instead of pressure, or both may be used at the same time.

(F) Embodiment Figures 1 and 2 show a first embodiment of the present invention. A rod electrode 16 is arranged concentrically on the inner diameter of one end of the roughly cylindrical electrode 14.
is arranged, and the insulator 18 connects the rod electrode 16 to the electrode 14.
It is held insulated from the The ignition chamber valve device 4 is arranged so as to close the inner diameter part of the electrode 14,
This valve body 4a, electrode 14, rod electrode 16 and insulator 18
An ignition chamber 2 is formed by. The valve body 4a is provided with a passage 4b therein, and is further provided with a stepped pressure receiving surface 4C. The electrode 14 includes a conical valve seat 14a on which the valve body 4a is seated, a fuel passage 28a communicating with the ignition chamber 2, a pressurized gas supply port 6a for supplying fuel pressurizing gas, and a stop valve to be described later. 8 is installed, a pressurized gas passage 14c that communicates between the pressurized gas supply port 6a and the valve chamber 14b, and also communicates with the pressurized chamber 10 described later, and the ignition chamber 2 and the valve chamber 14b. A pressurized gas passage 14d, a pressurized chamber 10 constituted by an inner diameter portion of the electrode 14, a pressure receiving portion 4C of the valve body 4a, and one end portion of a fitting 24, which will be described later, are provided. A pressurizing device 6 is connected to the pressurized gas supply port 6a, and a stop valve is provided between them. An ignition fuel supply device 28 capable of supplying ignition fuel 20 is connected to the fuel passage 28a. Note that a stop valve is provided in the fuel passage 28a. The electrode 14 has a valve chamber 1
A stop valve 8 screwed into the valve body 4b, a fitting 24 fitted to the outer diameter of the valve body 4a, and a stop valve 8 screwed into the valve body 4b.
4 is attached to the nut 26.

The fitting 24 is provided with a passage 24a in its inner diameter portion, and the passage 4b and the passage 24a communicate with each other. A spring 12 is provided between the fitting 24 and the valve body 4a, and acts to press the valve body 4a toward the valve seat 14a. That is, the pressurizing chamber 10 and the spring 12 constitute a normally closed valve mechanism that always operates the ignition chamber valve device 4 to the closed side. The pressing force exerted on the valve element 4a by the pressure of the pressurizing chamber 10 acting on the spring 12 and the pressure receiving part 4c is larger than the pushing force exerted on the lower end surface of the valve element 4a due to the pressure in the ignition chamber 2, but the ignition It is smaller than the pushing up force acting on the valve body 4a due to the combustion gas pressure generated when the ignition fuel 20 in the chamber 2 is ignited. An ignition mechanism 22 having a switch 22a is connected to the electrode 14 and the rod electrode 16.

A seal member 50 is provided between the electrode 14 and the insulator 18. A seal member 52 is provided between the stop valve 8 and the valve chamber 14b, and a seal member 54 is provided between the valve body 4a and the electrode 14. Further, a sealing member 56 is provided on the fitting surface of the fitting 24 and the valve body 4a, and a sealing member 56 is provided between the fitting 24 and the electrode 1.
4, a sealing member 58 is provided between them. The ignition device A is constituted by these members.

The fitting 24 communicates with a combustion chamber 40 of the gun barrel 30.

Next, the operation of this first embodiment will be explained.

A predetermined amount of ignition fuel 20 is supplied into the ignition chamber 2 from the ignition fuel supply device 28 through the fuel passage 28a, and the stop valve of the ignition fuel supply device 28 is closed to open the fuel passage 28.
Close a. The stop valve 8 is opened to introduce pressurized gas from the pressurization device 6 into the ignition chamber 2 through the pressurized gas supply port 6a and the pressurized gas passages 14c and 14d.
to be introduced. The pressurized gas is the ignition fuel 20 in the ignition chamber 2.
While applying pressure, the valve body 4a is pressed toward the valve seat 14a. The valve body 4a is also pressed against the valve seat 1 by the spring 12.
It is pressed toward 4a.

When the inside of the ignition chamber 2 is pressurized to a predetermined pressure, the stop valve 8
is closed to cut off communication between the pressurized gas supply port 6a and the ignition chamber 2, and the stop valve of the pressurizing device 6 is closed to close the pressurized gas supply port 6.
Close a. At this point, the pushing force acting on the valve body 4a is greater than the pushing force, so the pressure in the ignition chamber 2 passes through the passage 4b and the flow passage 24a of the fitting 24 into the combustion chamber 4. In addition, since the pressure inside the pressurizing chamber 10 is also sealed by the seal members 54 and 56, it will not leak into the combustion chamber 40 through the passage 24a of the fitting 24. The flying object 38 inside the projector 30 is not moved by the pressure of the pressurized gas.Next, in this state, the switch 22a of the ignition mechanism 22 is closed to energize the picture electrodes 14 and 16 to generate an arc.This causes ignition. The ignition fuel 20 in the chamber 2 is combusted and gasified, increasing the pressure in the ignition chamber 2.The pushing force generated by this pushes up the valve body 4a against the pressing force.The combustion gas pushes up the valve body 4a. and valve seat 14a
The high-temperature combustion gas enters the combustion chamber 40 in the gun barrel 30 through the passage 24a, which is led to the passage 24a of the fitting 24 through the passage 4b between the injection piston 32 and the flying body 38. The liquid fuel 44 in the fuel chamber 42 is pushed out into the combustion chamber 40 and ignited, causing explosive combustion. This makes it possible to fire the flying object 38 inside the gun barrel 30 at high speed. After firing, the valve body 4a receives the force of the spring 12 and the pressurized gas passage], 4
Due to the gas pressure trapped in c, the valve seat 14a is seated, and preparations for the next firing can be made.

In addition, in the above description, it is assumed that the valve body 4a is pressed against the valve seat 14a.
2 is used, but only one of them may be used.

Further, the pressurized gas passage 14c may be configured to communicate only with the ignition chamber 2 via the pressurized gas passage 14d, and another pressurizing device (not shown) may be connected to the pressurizing chamber IO.

Furthermore, instead of the spring 12, a pressure chamber similar to the pressurizing chamber 10 is provided so as to open at the end of the valve body 4a, and a pressurizing device is connected to this to apply pressure to the end of the valve body 4a. It may be made to act.

The stop valve 8 may be a check valve arranged to allow the flow toward the ignition chamber 2 but to block the flow from the ignition chamber 2.

A second embodiment of the stop valve 8 is shown in FIG.

Two valve seats 14e and 14g are provided in the valve chamber 14b. The pressurized gas passage 14c is arranged on the upstream side of the valve seat f4c, which is far from the ignition chamber 2. The pressurized gas passage 14f that communicates with the pressurized chamber 10 has valve seats 14e and 14g.
placed in between.

The stop valve 8 is provided with tapered portions at positions corresponding to the valve seats 14e and 14g, respectively.

In this second embodiment, a pressurizing device 6 and a pressurized gas supply port 6'
There is no need for a stop valve between a and a. The operation of this second embodiment is such that when the stop valve 8 is placed in the open position, the pressurized gas is
When the pressurized gas passage 14c flows into the ignition chamber 2 through the pressurized gas passage 14d and the pressurized gas passage 14f flows into the pressurization chamber 10, and when the stop valve 8 is placed in the closed position, the ignition chamber 2 The operation is similar to that of the first embodiment, except for two points: both the pressurizing chamber 10 and the pressurizing chamber 10 are cut off from communication with the pressurizing device 6.

A third embodiment of the stop valve 8 is shown in FIG. Valve chamber 14b
As in the second embodiment, two valve seats 14e and 14g are provided. The stop valve 8 has a through hole in its center, into which the valve 60 is fitted. A plug 64 is attached to one end of the through hole, and a spring 62 is provided that acts to push the valve 60 out of the through hole. The valve 60 is placed on the valve seat 14e, and the stop valve 8 is placed on the valve seat 14g. A seal member 66 is attached between the stop valve 8 and the valve 60. The operation of this third embodiment is almost the same as that of the second embodiment, but
Each valve seat 14e and 14g compared with the configuration of the embodiment.
Since the sealing can be performed independently, there is an advantage that the sealing action becomes more reliable.

(g) As described in detail, according to the present invention, the ignition fuel can be ignited after being sufficiently pressurized in the ignition chamber with a small volume, and the high-temperature combustion gas generated in this way can be ignites the fuel in the combustion chamber by introducing it into the combustion chamber,
Can launch projectiles. Since the flying object and the injection piston do not move while the ignition fuel is pressurized, the flying object can be launched safely.

Since the ignition chamber can have a small volume, the time required for pressurization is short, and the interval between firings of the projectile can be shortened. Moreover, the pressurizing device can be made small.

[Brief explanation of drawings]

1 and 2 are views showing the first embodiment of the present invention, and FIG. 3 is a view showing the second embodiment of the stop valve of the ignition device of the present invention.
FIG. 4 is a diagram showing a third embodiment of the stop valve of the ignition device of the present invention, and FIG. 5 is a diagram showing a conventional projectile launcher.
FIG. 6 is a diagram showing the relationship between the pressure applied to the ignition fuel and the energy required for ignition. 2... Ignition chamber, 4... Valve device for ignition chamber, 6... Pressurizing device, 8... Valve device for pressurized gas passage, 10... Pressurizing chamber, 12... Spring , 14c, 14d... pressurized gas passage, 20... ignition fuel, 22... ignition mechanism, 30... gun barrel, 38... flying object, 40...
・Combustion chamber. License applicant representative Japan Steel Works, Ltd.

Claims (1)

[Claims] 1. Ignition chamber (2) and ignition fuel (20
) and an ignition mechanism (22) for igniting the ignition chamber (2), and introducing combustion gas generated by the ignition into the combustion chamber (40) of the gun barrel (30). An ignition chamber valve device (4) that can be opened and closed; a pressurization device (6) that can supply pressurized gas at a predetermined pressure into the ignition chamber (2) through pressurized gas passages (14c, 14d); A pressurized gas passage valve device (8) that can open and close the pressurized gas passage (14d), and a valve normally closing mechanism (10) that always operates the ignition chamber valve device (4) to the closed side.
12), and the normally closed valve mechanism (10, 12) is set to have a characteristic that it does not open depending on the pressurized gas pressure supplied to the ignition chamber (2), but opens depending on the combustion gas pressure. Ignition system for projectile launchers. 2. The normally closed valve mechanism (10 and/or 12) has a gas pressure (
2. The ignition device for a flying object launcher according to claim 1, wherein one or both of a spring (10) and a spring (12) are used.