Rear sealing head heat-insulation layer structure for solid rocket engine and forming method of rear sealing head heat-insulation layer structure

Abstract

The invention discloses a rear sealing head heat-insulation layer structure for a solid rocket engine and a forming method of the rear sealing head heat-insulation layer structure, and belongs to thefield of design and manufacturing of heat insulation layers of heat protection structures for solid rocket engines. At present, a rear sealing head heat-insulation layer structure difficulty meets theuse requirements for light weight, ablation resistance, scouring resistance, high-efficiency manufacturing and low cost simultaneously. According to the rear sealing head heat-insulation layer structure, a heat-insulation body serves as a structural support, pre-formed light rubber heat-insulation materials are arranged and distributed at a large convergence end, pre-formed curing resin heat-insulation materials are arranged and distributed at a narrow convergence channel, the connection positions are in transition butting and lapping through stair-type steps, and overall one-time heat-curingforming is conducted to form an integrated structure through a forming mold tool. Practice proves that all interfaces of the rear sealing head heat-insulation layer structure prepared through the forming method are bonded reliably, the forming efficiency is high, comprehensive performance of a product is good, and the comprehensive use requirements of the rear sealing head heat-insulation structure for the engine can be simultaneously met well.

Description

technical field [0001] The invention belongs to the field of design and manufacture of a thermal insulation layer of a thermal protection structure of a solid rocket motor, and relates to a structure and a forming method of a thermal insulation layer of a rear head of a solid rocket motor. Background technique [0002] With the traction of high-performance and low-cost use of solid rocket motors, the design and molding methods of its thermal protection structures are increasingly required to have reliable adaptability. As an important structural part of the solid rocket motor, the rear head generally has to withstand the ablation of the high-temperature and high-speed gas flow of the engine and the more severe rapid erosion at the convergence point. The engine structural parts should be as light as possible while meeting the usage requirements; the manufacturing process should be as high-quality, efficient and low-cost as possible. [0003] At present, the structure design ...

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Problems solved by technology

[0003] At present, the structure design and process molding of the heat insulation layer of the rear head generally use a single material to form, which cannot take into account the comprehensive advantages, or use different functional materials to form, need to form different functional materials separately, and then bond and assemble after processing separately. There are many forming processes. The processing cycle is long, the cost is high, and the reliability of interface combination bonding is not as high as that of direct molding.

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