Method for repairing interface layering defects of fiber winding engine shell body

A technology for engine casing and delamination defects, which is applied in the direction of climate sustainability, sustainable transportation, air transportation, etc., and can solve the problems of casing shape and position tolerance, affecting the strength of composite layers, etc.
CN112223793AActive Publication Date: 2021-01-15湖北三江航天江北机械工程有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖北三江航天江北机械工程有限公司
Publication Date
2021-01-15

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Abstract

The invention discloses a method for repairing interface layering defects of a fiber winding engine shell body. The method comprises the following steps of drawing a defect edge marking line on the surface of a heat insulation layer, removing the heat insulating layer at the defect position and exposing a interface layering defect position, resetting a composite layer, cold-bonding repairing and hot-bonding repairing. Firstly, a heat insulation layer (ethylene-propylene-diene monomer or other heat insulation materials) vulcanized rubber sheet is formed on the surface of the composite layer ina cold-bonding repairing mode, and temperature isolation is carried out between the shell body composite layer and a hot-bonding repaired heat insulation layer, so that the influence of the vulcanization temperature on the strength and deformation of the shell body composite layer is reduced; then, through a hot-bonding repairing process, and secondary repairing is carried out on the defect position formed by the heat insulation layer after the heat insulation layer is debonded and removed, so that the repairing quality reliability of the heat insulation layer is greatly improved; and low-temperature curing resin adhesive is adopted for carrying out resetting and repairing on the defects between interface layers, and the influence of heating on the strength, the size and the form and location tolerance of a shell body is reduced on the premise that repairing of the interface of the composite layer is finished.
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Description

technical field

[0001] The invention belongs to the technical field of fiber winding engine shell production, and in particular relates to a method for repairing interface delamination defects of a fiber winding engine shell. Background technique

[0002] Filament wound engine casing is mainly composed of two parts: heat insulation layer and composite layer. The composite layer generally uses carbon fiber (or aramid fiber, etc.) Combustion generates high internal pressure capability.

[0003] As the heat insulation structure between the combustion chamber and the casing, the heat insulation layer is mainly responsible for the sealing of the fiber-wound engine casing, and through carbonization, decomposition, sublimation, etc., to isolate the high temperature of the high-temperature gas flow generated by the propellant combustion during the engine's working process. , to prevent the engine case from reaching temperatures that would endanger its structural integrity. [0004...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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