Solid rocket engine fiber-wound shell inner heat insulation layer cold bonding repairing method

Abstract

The invention discloses a solid rocket engine fiber-wound shell inner heat insulation layer cold bonding repairing method. The method comprises pre-treatment, repairing mature rubber sheet preparing,heat insulation layer defect treatment, repairing mature rubber sheet treatment, adhesive preparing and repairing. It is guaranteed that the surface defect of an inner heat insulation layer of a solidengine is repaired in a normal-temperature curing manner, it is guaranteed that the engine with the inner heat insulation layer defect can be continuously normally used, and the problem that due to the defect of the inner heat insulation layer, the engine cannot be normally used or is scrapped is solved; the thickness and the bonding face intensity of the repaired inner heat insulation layer meetthe requirements for the solid rocket engine fiber-wound shell inner heat insulation layer, meanwhile, the airtight performance and ablation performance of a repaired fiber-wound shell are guaranteed, and the solid rocket engine fiber-wound shell inner heat insulation layer cold bonding repairing method is suitable for repairing in the aspects that the defect depth is smaller than 5 mm, and the defect area is smaller than 5,000 mm<2>.

Description

technical field [0001] The invention belongs to the field of making a thermal insulation structure of a fiber-wound housing of a solid rocket motor, and specifically refers to a method for repairing a thermal insulation layer in a fiber-wound housing of a solid rocket motor by cold bonding. Background technique [0002] Solid rocket motor is a rocket power device with superior performance, which is composed of combustion chamber, propellant, igniter and nozzle and other components. The combustion chamber is a container for storing propellants, and at the same time provides a space for combustion, which must withstand high temperature above 3000°C and high pressure gas flow. The heat insulation layer in the combustion chamber is a layer of heat insulation protection material placed between the inner surface of the shell and the propellant. Its main function is to take away most of the heat through its own continuous decomposition and ablation to ease the transfer of high-temp...

AI Technical Summary

Problems solved by technology

Due to the influence of environmental conditions, film size, mandrel quality, manual operation and other unstable factors in the process of making the heat insulation layer, there may be shortage of materials, impurities and other redundant materials, interface debonding or due to heat insulation construction process. Improper operation in the middle causes defects such as separation of the local bonding surface of the material after the adiabatic shell is cured

Defects generally include debonding, bulging, void, warped edges, discounts, pits, etc. The above defects will inevitably affect the normal ablation of the insulation layer. In severe cases, the engine will be downgraded. repair of the insulation layer is inevitable

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