RU2302546C2 - Body of solid-propellant rocket engine - Google Patents

Abstract

FIELD: rocketry; solid-propellant rocket engines.

SUBSTANCE: proposed body of solid-propellant rocket engine contains load-bearing shell made of polymeric composite materials, and elastic cups holding charge relative to heat-protective coating of bottom of load-bearing shell. Walls of each cup from side of bottom of heat-protective coating are fastened with bottom additionally by intermediate element. Said intermediate element is made of cords, round and branching-off radial, ones, catches fastened with equal alternation on heat-protective coating of bottom and cup, respectively. Radial cords are secured through loops on their ends in neck area of body by round cords.

EFFECT: improved reliability of solid-propellant rocket engine in operation by preventing folding of cups when filling rocket engine with propellant.

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Description

The invention relates to mechanical engineering, namely to the bodies of rocket engines of solid fuels (solid propellant rocket engines), and can be used to create solid propellant rocket engines.

RTDT designs are known in which, for unfastening the ends of the charge from the bottoms of the housing in areas where the voltages in the housing-charge system exceed the maximum allowable, in the heat-shielding coating (TZP) the bottoms are fastened with cuffs made of elastic heat-shielding materials that repeat the profile of the bottoms and connected to the TZP with using the lock of the cuff (Designs of solid propellant rocket engines / Under the general editorship of Doctor of Technical Sciences, Professor L.N. Lavrov. M .: Mechanical Engineering, 1993. P. 62-64). An exception to the bonding of cuffs with TZP is provided by installing materials on their contact surfaces that do not have adhesion between themselves under the conditions of manufacture and operation of the housings.

The disadvantages of this design include the fact that the cuffs are not connected to the bottom plate on the majority of the surface, and the lack of adhesion to the bottom plate leads to their sagging relative to the bottom plate under their own weight, stretching and, as a result, incomplete adherence to the bottom surface of the bottom plate, to the formation folds when filling, which can negatively affect the quality of the charge and, accordingly, reduce the reliability of its operation.

An object of the invention is the elimination of the above disadvantages.

The technical result is achieved by the fact that in the housing of a solid fuel rocket engine containing a power shell made of polymer composite materials and elastic cuffs that unfasten the charge from the heat-protective coating of the bottoms of the power shell, the walls of each cuff on the side of the heat-protective coating of the bottom are additionally bonded with it using an intermediate element made of cords, circular and radial extending from it, and hooks fixed with uniform alternation on the heat-protective coating of the bottom and cuffs e respectively, while the radial cords through the loops at their ends are fixed in the area of the neck of the case with circular cords.

When tightening the circular cords, radial tension occurs, which, straightening through the hooks fixed on the surface of the bottom plate and cuffs, pull the latter to the surface of the bottom plate. Moreover, depending on the actual condition of the cuffs, the number and location of the radial cords and hooks may vary.

Figure 1 shows a structural diagram of an additional fastening of the cuffs with TZP bottoms using intermediate elements.

Figure 2 shows a view A of this diagram.

The wall of the cuff 1 from the side of the ТЗП 2 of the bottom of the body is additionally bonded with it using an intermediate element made of cords, circular 7 and radial 3 extending from it, and hooks 4 and 5, fixed with uniform alternation on the bottom and cuff, respectively, while the radial cords 3 through loops at their ends are fixed in the area of the neck 6 with a circular cord 7.

Figure 2, where the cuff 1 is not shown, shows hooks 5, mounted on the cuff wall from the bottom side of the cuff, and hooks 4, mounted on the bottom side of the cuff.

After filling the housing with fuel, the node 8 of the annular cord 7 is untied and thereby the tension of the cords 3, 7 is eliminated and the cuff 1 is moved along with the charge attached to it.

Thus, the use of the invention will eliminate the non-adhesion of the cuffs to the surfaces of the bottom of the bottom plate and the formation of folds of the cuffs when filling with fuel, improve the quality of the charge and increase the reliability of its operation.

Claims (1)

The housing of a solid fuel rocket engine containing a power shell made of polymer composite materials and elastic cuffs detaching the charge from the heat-shielding coating of the bottoms of the power shell, characterized in that the walls of each cuff on the side of the heat-shielding coating of the bottom are additionally bonded with it using an intermediate element made of cords , circular and radial extending from it, and hooks fixed with uniform alternation on the heat-protective coating of the bottom and cuff, respectively, while m radial cords through loops at their ends are fixed in the area of the neck of the case with circular cords.

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