Forming method of fiber-wound solidification rocket engine multiphase heat-insulating layer

Abstract

The invention discloses a forming method of a fiber-wound solidification rocket engine multiphase heat-insulating layer. The multiphase heat-insulating layer is jointly composed of ablation-resistantEPDM and a phenolic resin impregnated carbon fiber three-dimensional weaving body; on the one hand, under the condition that the thickness of the heat-insulating layer is not increased, ablation resistance of heat-insulating materials can be improved, the negative mass of an engine shell is reduced, and the mass ratio of an engine is increased; on the other hand, a multilayer patch mode and the design of a sandwich structure are adopted, and the formed multiphase heat-insulating materials have good manufacturability; and through two times of prepressing, on the one hand, gas between the two types of heat-insulating materials and between EPDM film layers is discharged, on the other hand, good interface bonding between the phenolic resin impregnated carbon fiber three-dimensional weaving body and the heat-insulating layer on the upper and lower positions is guaranteed, and the defects such as bulges, gas entrapment and debonding between the multiphase heat-insulating materials of the EPDM and the phenolic resin impregnated carbon fiber three-dimensional weaving body are prevented.

Description

technical field [0001] The invention belongs to the field of making thermal insulation materials in fiber-wound solid rocket motors, and specifically refers to a method for forming multi-phase thermal insulation layers of fiber-wound solid rocket motors. Background technique [0002] As the protective layer of the combustion chamber of the solid rocket motor, the inner insulation layer material has high temperature ablation resistance, high-speed heat flow resistance and good mechanical properties, preventing high temperature and high pressure gas from reducing the strength of the shell and endangering its structural integrity. The shell plays the role of heat insulation and heat protection, and is a key component to ensure the normal operation of the rocket engine. [0003] In recent years, with the new demand for high-performance rocket engines, high-speed and high-overload are becoming an important development trend of high-performance tactical missiles, and the requireme...

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Problems solved by technology

[0003] In recent years, with the new demand for high-performance rocket engines, high-speed and high-overload are becoming an important development trend of high-performance tactical missiles, and the requirements for long-term, oxidation resistance and erosion resistance of thermal insulation materials are more stringent; if the engine's Ablation resistance can be achieved from two aspects. On the one hand, it can be increased by increasing the thickness of the insulation material, but the increase in thickness will increase the negative mass of the engine, resulting in a decrease in engine quality; on the other hand, it can be achieved by using more ablation-resistant materials for insulation layer preparation

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