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A combination recuperator and gun barrel recoil brake form a single constructional unit assembly. This assembly includes a storage cylinder in which a recoil (brake) cylinder is mounted by means of a separating piston which forms part of the recoil cylinder and which is slidably disposed in the stor

A combination recuperator and gun barrel recoil brake form a single constructional unit assembly. This assembly includes a storage cylinder in which a recoil (brake) cylinder is mounted by means of a separating piston which forms part of the recoil cylinder and which is slidably disposed in the storage cylinder. A recoil piston is slidably disposed in the recoil cylinder and is operatively connected via a piston rod to the gun barrel. A guide bushing is mounted in the rear end wall of the storage cylinder and forms an axial guide for the piston rod of the recoil piston. The outer surface of the guide bushing forms together with the inner wall surface of the recoil cylinder and the internal bore of the separating piston a first passage for permitting a controlled flow of the pressurized liquid between the pressurized liquid chamber in the storage cylinder and the interior of the recoil cylinder. The outer contour of the guide bushing, the inner contours of the recoil cylinder and internal bore of the separating piston are so constructed and arranged that the pressurized liquid is acting on the recoil piston during recoil to firstly, until shortly after the projectile has exited from the gun barrel, only slightly or not at all throttle the flow therethrough, whereby only a reduced or no braking force is applied to the gun barrel, and thereafter the first passage steadily shrinks in size so that an increasing braking force is applied to the gun barrel.

대표청구항 ▼

An improved recoil brake for a gun barrel having a hydropneumatic recuperator and forward movement damping, including a recoil cylinder which is slidably mounted in a storage cylinder for pressurized gas, a separating piston slidable in the storage cylinder and rigidly secured to the recoil cylinder

An improved recoil brake for a gun barrel having a hydropneumatic recuperator and forward movement damping, including a recoil cylinder which is slidably mounted in a storage cylinder for pressurized gas, a separating piston slidable in the storage cylinder and rigidly secured to the recoil cylinder, said separating piston separating the storage cylinder into variable pressurized gas and pressurized liquid chambers, a guide bushing being axially mounted in the recoil cylinder, a piston rod axially slidably mounted in said guide bushing and having at one of its ends a piston axially rigidly secured thereto which piston is slidably disposed in the recoil cylinder, the gun barrel being secured to the other end of said piston rod, first passage means for the pressurized liquid being provided between the inner space of the recoil cylinder and the inner space of the storage cylinder in its rear end region that is behind the separating piston and in front of its rear end wall, and second passage means being provided for the pressurized gas between the pressurized gas chamber disposed behind a guide ring means in the storage cylinder in which the recoil cylinder is operatively mounted and the inner space of the storage cylinder disposed in front of the guide ring means: the improvement, comprising in combination, (a) wherein said guide bushing is constructed and arranged in such a way that first passage means cause the pressurized liquid to be firstly, until shortly after exiting of the projectile from the gun barrel, slightly, or not at all throttled during recoil, whereby only a reduced or no braking force is being applied to the gun barrel, whereafter said first passage means are increasingly reduced in size to thereby exert an increased braking force on the recoiling gun barrel; and (b) in the front region of the storage cylinder between internal wall of the storage cylinder and internal surface of the guide ring means for the recoil cylinder, which functions as a brake cylinder, a displacement cylinder is slidably guided in such a way that it is adapted to penetrate with its closed end into the inner space of the recoil cylinder, said displacement cylinder being provided with third throttling passage means to provide a passage between the interior of the displacement cylinder and the pressurized gas chamber in the storage cylinder.