Osłona termoizolacyjna metalowego korpusu silnika rakietowego

Abstract

Many years of experience in the design and manufacturing technology of ammunition and rockets by BUMAR AMUNICJA S.A. enabled undertaking, together with the Institute IMPiB Department Elastomers and Rubber Technology in Piastów, the task of developing an upgraded insulation cover for the metal body of the rocket motor of the GROM-M system. The insulating layer of the metal body of the motor is characterised by the fact that local thermal exposure occurring during rocket propellant combustion, often causes the motor body to burn through locally. Applying an insulating composition matched to the temperature of combustion of the rocket motor, brings about a carbonisation process applicable to this temperature. Thus, it provides a sufficient layer of carbon-carbon phase composite at the site to enhance the strength of the motor and protect the above-mentioned metal body from exposure to heat during combustion of the rocket propellant. The thermal insulating layer is a double layered coating consisting of a layer of rubber compound and a layer of impregnated carbon cloth. To obtain uniformity of the insulating layer and hence its heat resistance, similar components are used in the composition of the rubber compound for impregnating a composite based on carbon cloth: the same type of rubber, the same phenol-formaldehyde resin and the same vulcanising agents.