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Manufacturing method for manual patch of heat insulating layer of filament winding engine shell

A technology for an engine casing and a manufacturing method, which is applied in the directions of lamination auxiliary operations, chemical instruments and methods, lamination, etc. The effect of sticking and increasing reliability

Active Publication Date: 2012-08-15
航天科工火箭技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, compared with nitrile rubber insulation materials, EPDM has a higher Shore hardness (about 70), and because it is a non-polar material, its self-adhesive and mutual-adhesive properties are poor
This also directly leads to the fact that the manual patching process performance of EPDM insulation materials is much worse than that of nitrile rubber.

Method used

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  • Manufacturing method for manual patch of heat insulating layer of filament winding engine shell
  • Manufacturing method for manual patch of heat insulating layer of filament winding engine shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The method for making the manual patch of the present invention comprises the following steps:

[0039] 1) Adjust the ambient temperature of the manual patch insulation layer to 25°C and the relative humidity to 70%;

[0040] 2) Clean up the dust on the surface of the gypsum mandrel 6 used for engine casing molding, wrap a layer of polytetrafluoroethylene paper on the middle straight section of the gypsum mandrel 6, and fix the end of the polytetrafluoroethylene paper to the gypsum mandrel 6;

[0041] 3) Brush the silicone rubber release agent 3 times on the surface of the two ends of the gypsum mandrel 6 other than the polytetrafluoroethylene paper and dry it;

[0042] 4) Grinding the bonding parts of the hand-patched thermal insulation layer 4 on the molded part 3 of the front joint and the molded part 7 of the rear joint, cleaning them with alcohol and drying them;

[0043] 5) Insert the front joint molded part 3 and the rear joint molded part 7 into the mandrel 8, ...

Embodiment 2

[0057] The method for making the manual patch of the present invention comprises the following steps:

[0058] 1) Adjust the ambient temperature of the manual patch insulation layer to 23°C and the relative humidity to 60%;

[0059] 2) Clean up the dust on the surface of the gypsum mandrel 6 used for forming the engine casing, wrap a layer of nylon paper on the middle straight section of the gypsum mandrel 6, and fix the end of the nylon paper to the gypsum mandrel 6;

[0060] 3) Brush the PMR release agent twice on the surface of the two ends of the gypsum mandrel 6 other than the nylon paper and dry it;

[0061] 4) Grinding the bonding parts of the hand-patched thermal insulation layer 4 on the molded part 3 of the front joint and the molded part 7 of the rear joint, cleaned with acetone and dried;

[0062] 5) Insert the front joint molded part 3 and the rear joint molded part 7 into the mandrel 8, use the front joint positioning tool 1 and the rear joint positioning tool 9...

Embodiment 3

[0076] The method for making a manual patch of the present invention comprises the following steps

[0077] 1) Adjust the ambient temperature of the manual patch insulation layer to 28°C and the relative humidity to 50%;

[0078] 2) Clean up the dust on the surface of the gypsum mandrel 6 used for engine casing molding, wrap a layer of polytetrafluoroethylene paper on the middle straight section of the gypsum mandrel 6, and fix the end of the polytetrafluoroethylene paper to the gypsum mandrel 6;

[0079] 3) Brush the silicone rubber release agent 3 times on the surface of the two ends of the gypsum mandrel 6 other than the polytetrafluoroethylene paper and dry it;

[0080] 4) Grinding the bonding parts of the hand-patched thermal insulation layer 4 on the molded part 3 of the front joint and the molded part 7 of the rear joint, and cleaning and drying with ethyl acetate;

[0081] 5) Insert the front joint molded part 3 and the rear joint molded part 7 into the mandrel 8, use...

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Abstract

The invention discloses a manufacturing method for a manual patch of a heat insulating layer of a filament winding engine shell. By controlling the preparation environment of the manual patch, an appropriate adhesive is selected, a multilayer patching method is adopted to reduce the film thickness of a single-layer manual patch and patch size, then a fiber yarn is used for preloading pressure, and the heat insulating layer is repaired to increase the internal mass and shape structure size of the heat insulating layer after curing, thus manufacturing the manual patch. The manufacturing method solves the problems of high film hardness, poor self-adhesion and mutual viscosity, and high patching difficulty of an EPDM material, the thickness of the heat insulating layer meets the design requirements, and an EPDM anatomical layer is compact and smoothly passes engine ground test assessment for a few times.

Description

technical field [0001] The invention belongs to the field of manufacturing a thermal insulation structure of a fiber-wound engine casing, and in particular relates to a manual pasting method for making a fiber-wound engine casing thermal insulation layer. technical background [0002] The thermal insulation layer of the filament wound engine shell is mainly composed of the front and rear head insulation layers and the hand-patched thermal insulation layer. The manual patch thermal insulation layer is an important part of the thermal insulation structure. In the past, nitrile rubber was mostly used for the heat insulation layer. Nitrile rubber has the characteristics of low Shore hardness (about 60) and easy deformation, so the manual patching process of the material has good performance. Nitrile rubber has good self-adhesive and mutual-adhesive properties, and the type of adhesive used in the patching process is easy to choose. But because the density of nitrile rubber is a...

Claims

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Application Information

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IPC IPC(8): B32B37/12B32B38/16
Inventor 谭云水黄泽勇张志斌
Owner 航天科工火箭技术有限公司
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