DE2142763A1 - DEVICE FOR GAS-SEALING SEALING JOINT - Google Patents

Description

2U2763

Karlsruhe, August 4th 'I97I ZPP / H / Roe

INDUSTRIE-WERKE KARLSRUHE AUGSBURG Aktiengesellschaft

7500 Karlsruhe Gartenstrasse Jl

Device for gas-tight sealing of a parting line

The invention relates to a device for gas-tight Completion of a parting line between the rotatable in a housing or frame coaxially to the weapon barrel.

stored and the cartridge holder serving drum on the one hand and the end of a in the same housing or frame arranged weapon barrel on the other hand by means of a movable seal, in particular for revolver cannons high ballistic performance and accordingly trained ammunition.

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Automatic rapid fire cannons with revolver drums have long been known. Such as one of the type ■ MG 213/20 as plug stuff armament. This had a rate of 1200 rounds / min, and a ν = 1000 m / sec. the A further development of the MG 213/20 type had a rate of about 12.00 rounds / min with a caliber of 30 mm, and a ν = 535 m / sec.

The characteristic of such rapid fire cannons consists essentially of their revolver drum. This is usually provided with a number of circumferentially distributed cartridge chambers that come to lie behind the weapon barrel one after the other when the drum is rotated. The drum is moved in a manner known per se by a slide which acts on the drum by means of cam guides via rollers or the like. A cartridge conveyor star is arranged coaxially to the drum and connected to it by a coupling , from which the cartridges are gradually conveyed into the cartridge chamber of the drum in a likewise known manner by cams attached to the slide.

A particular problem with such revolver cannons is the gas-tight sealing of the parting line, which is located between the drum on the one hand and the rear end of the weapon barrel on the other hand,

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The means known for sealing the parting line are generally in the form of sockets, rings or the like, which pass through the pressure in the chamber is pressed against the rear surface of the gun barrel and thereby the gap between the drum and seal the barrel, which is essential for the function of an automatic revolver weapon. ■

These known sealants are associated with a variety of disadvantages, which affect the performance of those equipped with them Affect weapon:

On the one hand, the sealants are in the direct gas flow, so in the zone of greatest warming, when the projectile leaves the chamber, it inevitably ate just as great warming through which powder gases are exposed. This severely affects their service life. On the other hand, they are Sealing means of previously known type are relatively heavy, so that they hit the barrel mouthpiece when shooting with high energy hammer and strain it excessively. Another aftermath part also consists in the fact that the area acted upon by the powder gases is relatively large, which means that the opposing forces are equally large be transferred to the drum and further to the drum housing. As a result, it is necessary to especially difficult to dimension the drum housing. Another disadvantage is that the festival

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place the sealing elements in the drum by graining · or Caulking must be done. This is not only cumbersome to carry out, but also reduced by the amount required on the sealing ring Chamfer or facet, the actually usable sealing surface is not insignificant.

Finally, further disadvantages of known designs are that the quality of the projectile guidance until it enters the Trains of the barrel is affected by the fact that the bullet guide ring there is no fixed guide in the area of the sealing bushing or the sealing ring. Ultimately, there is a disadvantage too in that the outer joint between the sealing element and its,

Bearing in the drum is not to be sealed completely, so that gas losses inevitably occur, which reduce the muzzle velocity negatively affect and reduce the service life of weapon parts. ...........

Compared to these well-known and also with conceptual deficiencies the present invention has set itself the task of providing a structurally and functionally simple and To create a secure sealing system with a long service life, which can also be achieved in the application or deployment case without special tools or assembly devices can be easily disassembled and reassembled.

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These objects are achieved according to the will of the invention essentially in that the end face of the drum facing the end of the weapon barrel is concentric with a arranged for their projectile guide, serving to accommodate a highly heat-resistant and elastic sealant Annular groove is provided, which is distributed over several circumferentially Bores made in the drum are connected to the projectile guide, from which the partial currents of the high tension generated in the bores are separated into the bores Powder gases initially suddenly hit the sealant at the end of the corresponding to the drum end face Gun barrel brings sealing to the plant and is then deformed by the remaining gas streams in such a way that it is at the same time creates a seal against one groove flank and a support against the other groove flank.

Consistent application of this inventive basic idea became, as is also expressed in the following, special Attention is also directed to the structural design of the sealant:

j
Thus, the sealant is made according to a feature of the invention

essentially from a sealing ring with a relatively narrow annular surface. According to another feature of the invention, it is proposed to produce the sealing ring preferably from a hard metal with a relatively large elongation, for example (T = 7%. According to a further feature of the invention, the

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To design the height of the lugs formed on the sealing ring in such a way that that this is just a little less than the sum of the radial play on the outside and inside of the sealing ring self.

Obviously, those essential to the invention are exhausted Features not only in the structural, material and / or structural design of the sealant. Much more According to a further feature, the annular groove serving to receive the sealing ring is provided on one of its To provide flanks with an undercut, recess or the like, in which the molded on the inside of the sealing ring, see above the height of the protruding lugs Use their own elasticity to intervene to fix the sealing ring »

After all, it is of extremely great functional importance also the feature of the invention that the bores distributed around the circumference in the drum are in a relatively inclined position are arranged to the soul axis of the projectile guide or the gun barrel and in the cartridge chamber approximately at the level of the projectile space flow out.

The proposed invention has a number of advantages:

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First of all, there is an optimally effective seal between the end without any special structural and constructive effort the weapon barrel and the drum created by a by the gas pressure to be set in motion and by appropriate Choice of material within relatively wide limits temporarily deformable sealing ring causes the seal.

The arrangement of the around the annular groove also brings at least as great advantages as the aforementioned measures relative inclination to the axis of the soul with circumferentially distributed holes that form the annular groove with the bullet guide in the drum associate: ,

Through the aforementioned inclined bores, while the projectile is still in its guidance, partial flows of the high-tension powder gases generated during firing through the oblique * - · holes and act suddenly on the sealing ring. This ensures that the parting line between the end the barrel of the weapon and the drum is already sealed gas-tight when this is accelerated by the expansion of the powder gases Floor passes the parting line or enters the gun barrel, which imposes guidance and direction to the target.

Another advantage of the proposed invention is that the remaining gas flows also undergo a temporary deformation effect of the sealing ring, which is sealingly applied to one flank of the annular groove, while at the same time pressing against the other

K «... 30981 1/0337. whose flank is trimmed. ,

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As a result, the isolated partial currents of the high voltage Powder gases have to travel a relatively long distance before they hit the sealing ring, it is ensured that that the sealing ring is outside the hot zone produced when the propellant charge is ignited, which is extremely important . has a beneficial effect on its service life.

In the drawing, the invention is based on an exemplary embodiment without exhausting oneself in this alone.

It shows

Fig. 1 shows the schematic structure of an automatic rapid-fire cannon with revolver drum,

FIG. 2 shows the detail "A" according to FIG. 1,

Fig. 3 the detail ¹¹ B "according to: Fig. 2 with sealing ring, and

^ finally

W-

Fig. 4 is an enlarged front view of a sealing ring

Scale.

As shown in Fig. 1, the revolver drum 1 is rotatable mounted around the axis 2 in the housing or frame 3. in the

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Housing or frame 3 is also the weapon barrel 4, for example by means of a bayonet catch 4a, fastened interchangeably If the cartridge 5 located in front of the tube 4 is ignited, then on the one hand their projectile 5a driven forward / into the tube 4 and at the same time the sealing ring 6 arranged in the drum 1 via the connecting channels la from the ones released during ignition Powder gases applied. Here, the sealing ring 6 is naoh driven at the front against the end 4b of the weapon barrel 4, thereby sealing the between the barrel 4 and the end face la of the drum 1 located parting line 7 (Fig. J5) against the powder gases.

In Pig. 2 it can already be seen more clearly that the sealing ring has only a relatively narrow contact surface 6a which is not large needs to be than is necessary for its puncture as a sealing element. Practical shooting tests have shown that even a narrow ring surface is sufficient, even at high cadence, since the surface pressure is relatively high and fits in only narrow ring naturally better the unevenness of the opposite surface 4b is able to adapt as' a heavy and correspondingly dimensionally stable sealing sleeve of known construction, t. A small mass of the Sealing ring β is also to be accelerated much faster when the gas pressure builds up in the cartridge chamber.

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The sealing ring 6 is acted upon by partial flows of the high-tension powder gases separated from the total gas flow. These partial flows reach the annular groove Ib via several circumferentially distributed small bores la arranged in the drum 1 and press the sealing ring β with its contact surface 6a suddenly against the end 4b of the weapon barrel 4. The counterforce acting on the rear of the annular groove Ib, the in addition to the ground pressure of the cartridge 5 must be absorbed by the weapon ^{housing 3, has only a relatively small value F} , since this additional pressure, which acts in the annular groove Ib, is lower than the gas pressure in the chamber itself because of the strong throttling effect of the bores la . Since the area of the sealing ring β is also small, the product of pressure times area results in only a small additional force which loads the weapon housing 3. This in turn has the advantage that the housing can be made much lighter than those of conventional designs.

While the sealing ring 6 itself has the task of radially entering the parting line 7 between the end 4b of the weapon barrel 4 and The end face Ic of the drum 1 wanting to intercept powder gases, the task still remains to be solved, the one from the annular groove Ib between the sealing ring 6 and the outer wall of the ring groove, that is in the gap Id, which is necessarily present, to seal off gases that want to pass through. This sealing work is carried out by ■

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make use of the elastic deformability of that which has remained between the annular groove Ib of the drum 1 and the projectile guide Ie Materials achieved. As soon as the projectile 5a passes through this space when firing, the powder gases act there ex-, panding and cause the two joints Id, If to close, between which the sealing ring! 6 is located. This is a passage of powder gases through these joints is no longer possible.

The undercut, recess or the like. Ig provides a demarcation of the deforming part 1h of the drum 1 from the rear part of the drum which does not deform during the shot 1. Since this elastic deformation of the part lh only begins when the sealing ring 6 is already sealing on the At the end of 4b of the gun barrel 4, there is already - as described above - previously isolated partial ■ If the powder gases flow through the small bores 1 a distributed around the circumference of the drum 1, it enters the annular groove 1 b are and have acted on the sealing ring 6, it is completely impossible that about the sealing ring already. prematurely apply clamping-sealing against the flanks ld, If could .and thereby hindered in its required movement in the direction of the sealing surface 4b corresponding to it will. That the sealing first of the parting line 7 and then the joints ld, If takes place in the correct chronological order,

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is particularly favored by the fact that the circumferentially distributed in the drum 1 mounted holes la in a relative inclination to the core axis 8 of the projectile guide Ie or the gun barrel 4 are arranged and open approximately at the level of the cartridge 5 in the bullet guide Ie.

The assembly of the sealing ring 6 can be accomplished very easily and quickly., Compared to the known Dichtungsbohsen no protection against twisting or the like is required, " which would have to be done with these by graining or caulking.

From Fig. 4 it can be seen that on the inside 6b of the sealing ring 6 there are several circumferentially distributed lugs 6c are located. For reasons of better visibility, these noses are shown greatly exaggerated in the radial direction in the drawing. she when installed, grip into the recess, recess od. öergL · Ig the ring groove Ib inserted into the drum 1 and thereby prevent the sealing ring from falling out (fc for example when dismantling the drum 1. Are the lugs 6c such ί dimensioned that the radial dimension of the sealing ring 6, measured over these noses, to a little play under the also radially measured width of the annular groove Ib, the sealing ring 6 decreases when inserted into the annular groove Ib as a result of its elastic deformability initially a polygon-like shape. When the lugs 6c in the undercut, recess or the like. Ig have occurred, the sealing ring 6 springs back into its original circular shape, in which it then also

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remain.

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A hard metal has proven to be the material for the sealing ring 6 with relatively high elongation properties, such as that under the

Trade names known "STELLIT" or "ALACRITE", as special Proven to be beneficial, especially since hard metals of this type, in a known manner, also have the positive and, in the present case, even desirable Have the property of high heat resistance.

The selected type of ring lock makes it possible to keep the mass of the sealing ring 6 small, since its contact surface 6a corresponds approximately to the ring cross-section. With this type of training there is no bevel or facet to overlap Granulations required, which made it necessary to reinforce the cross section behind the sealing surface 6a. Moreover is a Granulating or caulking on the hardened drum 1 is not easy to do because the hard and therefore mostly brittle surface the drum 1 must then be deformed and there is a risk of material particles breaking out. This difficulty increases when replacing a z. B. become unusable by wear sealing ring against a new one, there then the securing by graining etc. would have to be done again ..

A particularly beneficial influence on the accuracy of the shot The weapon has the sealing system according to the invention in that the guidance of the projectile 5a from the cartridge chamber to the barrel 4 does not have to be interrupted, as is inevitable with previously known designs. In the Fi. 1 to 3 it can be seen that

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the projectile 5a on its way into the tube 4 only with each Revolver weapon construction-related gap 7 between drum 1 and the end 4b of the gun barrel 4 must be bridged, which also for large-caliber revolver cannons is only a fraction of a millimeter. Especially when the floor space Ie of the drum 1 is provided with guide strips Ii, in which the guide ring of the projectile 5a can cut, is a good guide of the projectile reached from the chamber into the barrel 4. Through this

^The bullet's tendency to tilt or the like is prevented, which in the previously known designs was particularly favored by the annular gap interrupting the bullet guidance in the area of the sealing ring.

Naturally, the purpose of the invention can be achieved by other shaping or dimensioning of the components involved in the sealing process can be achieved without going beyond the scope of the inventive concept explained here.

■.

Pamphlets considered;

1.0 Lusar, R., "The German weapons and secret weapons of

Second World War and its further development "

2.0 German Patent No. 86j 6l4

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Claims (1)

Claims £ ι 4 2 7 6 3 Device for gas-tight sealing of a separating joint between the drum, which is rotatably mounted in a housing or frame coaxially to the gun barrel and used for cartridge receptacle, on the one hand, and the end of a gun barrel arranged in the same housing or frame, on the other hand, by means of a movable seal, in particular for revolver cannons with high ballistic performance and appropriately trained ammunition,
characterized in that I that the end (4b) of the weapon barrel (4) facing end face (Ic) of the drum (1) with a concentric to their bullet guide (le) arranged to accommodate a highly heat-resistant and elastic sealant (6) serving annular groove (Ib) is provided, which over several Bores (la) distributed circumferentially in the drum (1) are connected to the projectile guide (le), of which from the partial flows of the high tension generated in it during launch, separated into the bores (la) from the total gas flow Powder gases initially abruptly hit the sealing means (6) at the one corresponding to the drum end face (ic) Brings the end (4b) of the weapon barrel (4) sealingly into contact and then deformed it in this way by the remaining gas flows that there is at the same time a seal against the groove flank (Id) and a protection against the groove flank (If) brings about. 309811/0337 - * - 2U2763 2. Device according to claim 1,
characterized, that the sealing means consists essentially of a sealing ring (6) with a relatively narrow annular surface. J5. Device according to claim 2, characterized, that the sealing ring (6) consists of a hard metal known per se, the expansion of which is about 7 $. 4. Apparatus according to claim 1 to Jf,
characterized, that the receiving of the sealing ring (6) serving annular groove (Ib) on one of its planks (If) with a rear turn Recess or the like (Ig) is provided, in which the the inner side (6b) of the sealing ring (6) formed, lugs (6c) which rise above its overall height Take advantage of their own elasticity to fix the sealing ring (β) intervene. 5 device according to claim 4,
characterized, that the height of the lugs (6c is slightly less than the sum of the radial play on the outside and inside of the sealing ring (6). 309811/0 3 37 2U2763 6. Apparatus according to claim 1,
characterized, that the circumferentially distributed in the drum (1) attached Bores (la) arranged in a relative inclination to the core axis (8) of the projectile guide (Ie) or the gun barrel (4) and open into the chamber approximately at the level of the projectile space (Ie). 309811/0 3 37 J? Blank page