Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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.

Active Publication Date: 2021-01-15
湖北三江航天江北机械工程有限公司
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the same resin is used to repair the composite layer, the secondary heating will affect the strength of the composite layer and even the shape and position tolerance of the shell

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for repairing interface layering defects of fiber winding engine shell body
  • Method for repairing interface layering defects of fiber winding engine shell body
  • Method for repairing interface layering defects of fiber winding engine shell body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0087] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0088] The method for repairing interface delamination defects of filament wound engine shells is especially suitable for debonding repairs where the insulation layer is more than 10mm. The repair of interface delamination defects includes defect identification, defect removal, composite layer reset, cold adhesive repair and hot adhesive repair. Specific steps are as follows:

[0089] 1) Ultrasonic testing followed by DR testing to accurately locate the position of the interface delamination defect, and draw a defect edge marking line on the surface of the thermal insulation layer

[0090] In order to accurately define the defect location, during the ultrasonic inspection process, glue mold cloth is pasted on the edge of the interface delamination defect to make the defect, which is used as a reference for the definition of the defect...

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
Login to View More

PUM

No PUM Login to View More

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.

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C73/10B29C73/24B29C73/26
CPCB29C73/10B29C73/245B29C73/26B29C73/24B29C2073/262B29C2073/266Y02T50/60
Inventor 谭云水张宇姚桂平高李帅吕银辉李忠仕
Owner 湖北三江航天江北机械工程有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com