DE102005030092A1 - Parachute cartridge/monitoring missile separation bolt, has piston which is fit in axial direction, where piston is accelerated in axial direction during ignition of propelling set - Google Patents

Abstract

The bolt has a pin body (2), which extends in the axial direction. An axial borehole is brought in the pin body, where an ignitable propelling set is inserted into the borehole. A predetermined breaking point is arranged transverse to the axial direction. A piston (9) is fit in the axial direction, where the piston is accelerated in the axial direction during the ignition of the propelling set.

Description

The The invention relates to a separating screw with a in axial Direction extending pen body, with one in the pen body introduced axial bore into which an ignitable propellant charge is inserted, and with a predetermined breaking point transverse to the axial direction.

Such a separating screw is for example from the DE 87 16 561 U1 , of the DE 295 21 679 U1 or the AT 006 827 U1 known. Such a designed release screw is used for releasably connecting two components. The two components are firmly connected to each other via the separating screw, for example via a screw. If the propellant ignited in the separating screw, so in the axial bore within a short time a large amount of gases released. As a result of the resulting high overpressure, the separating screw ultimately tears apart at the predetermined breaking point, as a result of which the two parts originally held together by the separating screw are detached from one another.

at many applications it is desirable which can be solved by the separating screw to move apart connected parts after separation of the connection. For example, over the separating screw parts of a missile held together, so it becomes necessary to separate the separated parts from the missile Remove to avoid a collision. Disadvantage wise at conventional Disconnect the separated parts only a low speed in the axial direction Rich, since the resulting gas at ignition of the propellant gases immediately expand after breaking the breaking point.

task The invention is a separating screw of the aforementioned Indicate type, with the opposite a separation screw of the prior art, a higher separation speed of separated parts can be achieved.

These Task is for a separating screw according to the preamble of claim 1 according to the invention solved in that in the axial bore a piston is fitted, the ignition of the propellant can be accelerated in the axial direction.

The Invention is based on the consideration, that for a piston inserted into the axial bore of the at ignition of the propellant released gases resulting pressure increase in a pulse of the piston can be converted in the axial direction. This pulse of the piston is viewed in the forward direction forward lying section transferred to the separating screw. At the same time arises at ignition of the propellant due to the momentum conservation a the impulse of Piston opposite recoil pulse, in the forward direction considered the piston considered rear portion of the separating screw acts. About the Predetermined breaking point, the maximum gas pressure is controlled and over the Length and Diameter of the piston (piston stroke) the acceleration.

About the Selection of materials for the pen body and the piston as well the composition of the propellant may be the relative or separation rate the parts flying apart on the respectively desired Use of the separating screw can be adjusted. As a material for the pen body and for the Piston is particularly suitable steel. As propellant is suitable Propellants.

by virtue of the oppositely directed pulses of the two separate sections of the Separating screw will also be attached to it, just above the Separating screw connected parts moved apart.

The Separating screw is particularly suitable for detachable connection of parts a missile. So can by means of the separating screw of a observation floor with a directional pulse, for example, a parachute cartridge be separated. Also allows the release screw the dropping a Front hood of a missile. there The front hood or parts of the front hood can give an impulse which avoids collision with the missile. Also can the release screw to open of container lids when launching missiles or projectiles are used. The separating screw can continue always be used when except the separation of the connected Parts in addition one high separation speed is required.

to ignition of the propellant is a mechanical ignition suitable. advantageously, However, is in the axial bore for igniting the propellant one electric squib used. about an electric pulse is ignited by means of the squib of the propellant. This allowed over a corresponding electronics in a simple manner both a remote controlled as well as a timed triggering of the ignition of the propellant charge.

To form the predetermined breaking point, in particular, a material tapering of the pin body arranged at the corresponding location is suitable. This can be done selectively or by notching. With regard to the axial momentum to be achieved SES of the two diverging parts of the separating screw, it is advantageous if the predetermined breaking point is formed as a groove surrounding the pin body.

From Advantage is it further when the breaking point at the level of the piston is arranged. In this way, the piston is so long accelerates until it breaks the predetermined breaking point leaves the axial bore of the remaining portion. Only can the after ignition of Propellant gas released unhindered expand. The piston length, the in the section inserted, specifies the acceleration path.

For a common arrangement, in which both sections the separating screw after tearing the predetermined breaking point have an opposite speed is a 2/3 section of the piston length in the remaining, rear section stored.

One embodiment The invention will be explained in more detail with reference to a drawing. The only one shows Figure schematically after ignition of the propellant charge the movement of a separating screw with a in the axial bore used piston.

1 represents in three movement phases a), b) and c) the movement of a separating screw 1 holding a pen body 2 and one in the pen body 2 recessed axial bore 3 after ignition of the propellant used in the axial bore 5 represents.

In the movement phase a) is the separating screw 1 before the ignition of the propellant 5 , In the axial bore 3 is at the propellant 5 connected an electric squib 6 let in, via electrical connection wires 7 the ignition of the propellant 5 can trigger. Before the propellant 5 is in the axial bore 3 a piston 9 movably fitted. At the connection end of the separating screw 1 is - not shown - the squib by means of a corresponding connector in the pen body 2 screwed. This simultaneously becomes the axial bore 3 sealed to the outside. At the height of the piston 9 is still a breaking point 12 introduced in the form of a circumferential groove. The piston length 20 in a rear section 15 the separating screw 1 inserted, specifies the acceleration path.

In the movement phase b) the separating screw 1 immediately after ignition of the propellant 5 detected. The propellant 5 has at this time in the axial bore 3 already explosive gases 13 released. As a result of high pressure of gases 13 is the piston 9 in the Axialboh tion 3 already in the direction of the arrow 18 accelerated. The pulse of the piston 9 is there because the piston 9 at the end of the axial bore 3 is arranged on a front section 14 the separating screw 1 transfer. By conservation of momentum also an oppositely directed pulse has been created, which on the rear section 15 the separating screw 1 acts and this in the direction of the arrow 20 accelerated. Because of these two opposing impulses is already the breaking point 12 torn apart.

In the movement phase c), the front part has 14 the separating screw 1 already so far from the back section 15 removed that piston 9 the axial bore 3 has left. The gases 13 can the axial bore 3 leave unhindered.

a) b), c)

movement phases

1

release screw

2

pen body

3

axial bore

5

propellant

6

electrical squib

7

leads

9

piston

12

Breaking point

13

gases

14

Section, front

15

Section, rear

18 19

arrows

20

piston length

Claims (5)

Separating screw ( 1 ) with an axially extending pin body ( 2 ), with one in the pen body ( 2 ) introduced axial bore ( 3 ) into which an ignitable propellant ( 5 ) is inserted, and with a predetermined transverse to the axial direction of predetermined breaking point ( 12 ) characterized in that in the axial bore ( 3 ) a piston ( 9 ), which is ignited when the propellant is ignited ( 5 ) can be accelerated in the axial direction. Separating screw ( 1 ) according to claim 1, characterized in that in the axial bore ( 3 ) to ignite the propellant charge ( 5 ) an electric squib ( 6 ) is used. Separating screw ( 1 ) according to claim 1 or 2, characterized in that the predetermined breaking point ( 12 ) as one the pen body ( 2 ) circumferential groove is formed. Separating screw ( 1 ) according to one of the preceding claims, characterized in that the breaking point ( 12 ) at the level of the piston ( 9 ) is arranged. Separating screw ( 1 ) according to one of the preceding claims, characterized in that a 2/3 section of the piston length ( 20 ) in the section ( 15 ) is stored.