JPH0710052Y2 - Rocket ignition command transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an ignition command transmission device for a rocket that transmits an ignition command signal from an ignition command transmission device to an ignition device provided in a rocket nozzle by a signal transmission line. .

[Conventional technology]

FIG. 4 shows an example of a rocket motor having an ignition device arranged in the rocket nozzle. In this, a heat-resistant insulator is attached to a spherical motor case 1 to directly fill the propellant 2, the rear side of which is opened to include a core hole 3 and a radial slot 4 centered on the core hole 3. While forming the cavity 5, the nozzle skirt 6 is provided with an igniter (ignition device) through a bracket 7 and shear pins (not shown).
8 is provided and the ignition nozzle 9 is directed toward the bottom 10 of the inner cavity 5. A signal transmission line 11 for transmitting an ignition command signal from an ignition command transmission device (not shown) to the igniter 8 is provided along the inner wall and the outer wall of the nozzle skirt 6 via the rear end of the nozzle skirt 6. And fix it with adhesive tape. In addition, 12 is a nozzle insert which forms the nozzle throat 13, and 14 is a heat insulating material. Since the igniter 8 is in the rocket nozzle, the rocket motor 1 can improve the filling rate of the propellant in the motor case, and when the combustion chamber pressure increases after ignition, the igniter 8 is blown backward and It has the advantage of reduced weight.

Also, as payload weight tends to increase today,
It is required to reduce the weight of the rocket system excluding the payload weight to the utmost limit.Therefore, like the extension nozzle and the deployment nozzle, the nozzle length is shortened at launch and the nozzle rear part is extended and deployed before propellant ignition. Then, a rocket nozzle that can perform the same function as a normal rocket nozzle may be adopted.

[Problems to be solved by the invention]

By the way, in this way, the igniter 8 is installed in the rocket nozzle.
In the case of disposing the above, since it has been conventionally fixed to the inner wall and the outer wall via the rear end of the signal transmission line nozzle skirt 6 for transmitting the ignition command signal from the ignition command transmitting device to the igniter 8, There is a problem that it is difficult to adopt a structure in which the rear end of the rocket nozzle moves before ignition of the propellant, that is, a so-called extension nozzle or expansion nozzle, the signal transmission line is fixed via the rear end of the nozzle.

Therefore, an object of the present invention is to arrange a signal transmission line from the ignition command transmission means to the ignition means provided in the rocket nozzle without passing through the rear end of the nozzle.

[Means of the Invention]

An ignition command transmission device according to the present invention for achieving the above object and solving the problems of the prior art includes an ignition command signal from an ignition command transmission device to an ignition device arranged in a rocket nozzle by a signal transmission line. In a transmission device, a heat-resistant signal relay means that is hermetically fixed to the skirt wall material of the non-movable part of the rocket nozzle is fixed to the wall material, and one end is connected to the ignition means and the other end is leaded. A signal transmission lead wire to which a wire terminal is attached, the signal relay means is connected to the signal transmission main line from the ignition command transmission means at the outer end portion, and the combustion gas injection direction is provided at the inner end portion. A contact-type terminal connecting portion which is oriented toward the side and is detachably connected to the lead wire terminal from this direction is formed, and the lead wire terminal of the signal transmission lead wire is connected to the terminal connecting portion for connection. The lead wire terminals burn Is obtained so as to leave to the injection direction when the injection of the gas.

The signal relay means is formed into a rod shape made of a heat-resistant conductive material, and the outer shape is formed such that the outer end portion is narrowed toward the outer side of the nozzle, and the outer end portion is for signal transmission. A connection hole for detachably connecting the terminal provided on the main line is formed, and a terminal connection hole for detachably connecting the lead wire terminal of the signal transmission lead wire is formed at the inner end portion, and the connection hole is formed. It is desirable that a non-penetrating portion is provided between the terminal connecting hole.

[Action]

In the ignition command transmission device according to the present invention, with the above configuration, if the signal relay means is fixed through the non-movable part of the nozzle and the lead wire terminal is inserted into the terminal connection part, the ignition command from the ignition command transmission means is It is transmitted to the ignition means by the signal transmission main line and the signal transmission lead wire through the signal relay means which does not move even when the rear portion of the nozzle moves. Also,
The terminal connection part of the ignition means is oriented rearward, and the lead wire terminal is inserted therein, so that the lead wire terminal is connected to the terminal connection part even when the combustion chamber pressure increases after propellant ignition and the ignition means blows off. Smoothly, and the blowing operation of the ignition means is not hindered. Since the signal relay means has heat resistance and is airtightly fixed to the skirt wall material, high temperature combustion gas does not jet out of the nozzle from the fixed portion after the ignition device is blown off.

〔Example〕

1 and 2 show an example of an ignition command transmission device according to the present invention. First, referring to FIG. 1, the rocket nozzle of the rocket motor 20 shown in this drawing will be described.
Reference numeral 21 denotes a fixed nozzle portion 21a fixed to the motor case 1 by a nozzle holder 22 and an outer wall of the fixed nozzle portion 21a as indicated by a chain double-dashed line in the figure, and a driving device (not shown) is provided immediately before ignition of the propellant. The rocket nozzle nozzle 21 is provided with an igniter (ignition device) 23 and an ignition command transmission device (not shown). Signal relay device 30 for relaying the ignition command from (1) is fixed so as to penetrate the fixed nozzle portion 21a, and the main line 24 for signal transmission from the ignition command transmission device is connected to the outside of the signal relay device 30. In addition, the signal transmission lead wire 25 connected to the igniter 23 is connected to the inner side of the signal relay device 30, and the ignition command transmission device and the igniter 23 are connected. In FIG. 1, the same parts as those shown in FIG. 4 are designated by the same reference numerals, and the duplicated description will be omitted.

FIG. 2 shows an example of a specific configuration of the signal relay device 30. In the figure, 31 is a signal relay member formed of a heat-resistant conductive material such as graphite so as to be narrowed outward, 32 is a holder for bonding and fixing the signal relay member 31, 33 Is an adapter for attaching the holder 32 to the fixed nozzle portion 21a, and 34 is the fixed nozzle portion 21a.
The insert 35, which is fitted into the stepped hole formed in the hole to reinforce the hole, is a gasket. Further, 38 and 39 are washers and bolts for fixing the holder 32, and 36 and 37 are screws and nuts for fixing the adapter 33, respectively. Further, at the outer end of the signal relay member 31, a terminal connection portion 42 for inserting and fixing the terminal 41 attached to the terminal of the ignition command transmission main line 24 from the ignition command transmission device is provided, while the inside of the signal relay member 31 is provided. A terminal connecting portion 44 for inserting and fixing the terminal 43 attached to the end of the signal transmission lead wire 25 connected to the igniter 23 is provided at the end portion.

Therefore, according to such a configuration, the ignition command from the ignition command transmission means does not pass through the rear end of the rocket nozzle 21, and passes through the ignition signal main line 24, the conductive signal relay member 31, and the signal transmission lead wire 25, and the igniter. Since it can be transmitted to 23, the movable nozzle portion 21a of this rocket nozzle 21
1 has a structure extending from the position shown by the two-dot chain line in FIG. 1 to the position shown by the solid line, the transmission path of the ignition signal is not affected by the movement of the rocket nozzle 21. Further, when the propellant 2 is ignited and the pressure in the combustion chamber rapidly rises to reach a predetermined pressure, the shear pin 10 of the bracket 7 is cut and the igniter 23 is blown back. At this time, the signal connected to the igniter 23 The transmission lead wire 25 is also pulled rearward, the terminal 43 is pulled out from the terminal connecting portion 44 of the signal relay member 31, and is discharged rearward together with the igniter 23. Further, since the signal relay member 31 and the holder 32 are airtightly attached by the gasket 35, the high temperature combustion gas will not be ejected from the holder attachment portion. Further, since the signal relay member 31 has a tapered surface that narrows outward and is enclosed in the holder 32, the signal relay member 31 pops out of the holder 32 even if it is pushed outward by high temperature combustion gas. There is no such thing.

FIG. 3 shows another embodiment of the signal relay device according to the present invention. This signal relay device 50, while mounting and fixing the signal relay member 31 similar to the above-described embodiment to the holder 51,
The bracket 52 is fixed to the nozzle holder 22 with the screw 36 and the nut 37.
The holder 51 is inserted and mounted in a series of holes that penetrate the fixed nozzle portion 21a and are directed rearward, and the outer end portion of the holder 51 is held by a stopper 60. 61 is a screw for fixing the stopper 60. Therefore, even with such a configuration, the same effect as that of the above-described embodiment can be obtained, and since the holder 51 is fixed to the bracket 52 by adhesion, the weight can be reduced as compared with the above-described embodiment. If the adhesive strength is sufficient, the stopper 60 is unnecessary and the weight can be further reduced.

〔effect〕

As described above, according to the ignition command signal transmission device according to the present invention, the signal relay means is penetrated and fixed to the non-movable part of the rocket nozzle so that the ignition command from the ignition command transmission means moves to the rear part of the nozzle. Since it can be transmitted to the ignition means through the signal relay means that does not move even at times, it is extremely easy to install the ignition means in the rocket nozzle even if the rear part of the rocket nozzle moves. Become.

Further, by directing the terminal connecting portion of the signal relay means toward the injection direction of the combustion gas, the lead inserted into the terminal connecting portion when the ignition means is blown to the rear of the nozzle after being ignited by the propellant. The wire terminal can be smoothly removed toward the injection direction side of the combustion gas, and the ignition device can be easily discharged rearward. Further, since the signal relay means is airtightly fixed to the nozzle wall, even after the ignition means is released rearward, the hot combustion gas passes through the signal relay means from which the lead wire terminal is detached or penetrates the nozzle wall. It is possible to prevent problems such as deflection in the propulsion direction due to non-uniformity of the circumferential pressure distribution in the nozzle without breaking up the pressure balance of the injected gas without being ejected outside the nozzle.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of an ignition command transmission device according to the present invention, FIGS. 2 and 3 are sectional views showing a concrete configuration example of the ignition command transmission device according to the present invention, and FIG. It is a figure which shows the arrangement | positioning state of an ignition command transmission line. 21 ... Rocket nozzle 23 ... Igniter 24 ... Ignition command transmission main line 25 ... Ignition command transmission lead wire 30 ... Signal relay device 31 ... Signal relay member 42, 44 ... Terminal insertion part

Claims (2)

[Scope of utility model registration request] 1. An apparatus for transmitting an ignition command signal from an ignition command transmission means to an ignition means arranged in a rocket nozzle by a signal transmission line, by penetrating a skirt wall material of a non-movable part of the rocket nozzle, A heat-resistant signal relay means airtightly fixed to the wall material, and a signal transmission lead wire having one end connected to the ignition means and a lead wire terminal attached to the other end portion, the signal relay means, Contact-type terminal connection in which the main line for signal transmission from the ignition command transmission means is connected to the outer end, and the lead wire terminal is detachably connected to the inner end from the direction toward the injection direction of the combustion gas. And a lead wire terminal of the signal transmission lead wire is connected to the terminal connection portion so that the connected lead wire terminal is disengaged in the injection direction when the combustion gas is injected. Location Door of the ignition command transmission equipment. 2. The signal relay means is formed into a rod shape made of a heat-resistant conductive material, and the outer shape is formed into a shape in which the outer end portion is narrowed toward the outer side of the nozzle, and the outer end portion is formed. Form a connection hole for detachably connecting a terminal provided on the signal transmission main line, and a terminal connection hole for detachably connecting a lead wire terminal of the signal transmission lead wire at the inner end portion. The rocket ignition command transmission device according to claim 1, wherein a non-penetrating portion is provided between the connection hole and the terminal connection hole.