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

A solid rocket and thermal insulation layer technology, applied in household components, household appliances, other household appliances, etc., can solve the problems of interface debonding, partial separation of material bonding surfaces, bulging, etc. Unusable or scrapped effects

Active Publication Date: 2018-10-12
湖北三江航天江北机械工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 defect

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 1) Pretreatment

[0063] 1a) Adjust the temperature and relative humidity of the repairing environment of the inner insulation layer, the repairing ambient temperature is 25°C and the relative humidity is 55%;

[0064] 1b) Clean up the dust and sundries on the defective surface of the inner insulation layer;

[0065] 1c) Insert the plasticine into the defect position, then take out the plasticine, measure the thickness and area of ​​the plasticine, the measurement results are the defect depth and defect area, the defect depth is 1.4mm, and the defect area is 15mm×180mm;

[0066] 2) Preparation of cooked film for repair

[0067] 2a) Thin pass: adjust the roller spacing of the rubber mixer to 0.2-0.6m, and the EPDM raw rubber material is thin-passed through the rubber mixer, and the number of thin-pass is 3 to 4 times;

[0068] 2b) Film output: adjust the distance between the rollers of the rubber mixing machine, and output the film according to the thickness of 1.8mm a...

Embodiment 2

[0091] 1) Pretreatment

[0092] 1a) Adjust the temperature and relative humidity of the repairing environment of the inner insulation layer. The repairing ambient temperature is 30°C and the relative humidity is 65%;

[0093] 1b) Clean up the dust and sundries on the defective surface of the inner insulation layer;

[0094] 1c) Insert the plasticine into the defect position, then take out the plasticine, measure the thickness and area of ​​the plasticine, the measurement results are the defect depth and defect area, the defect depth is 3.8mm, and the defect area is 30mm×40mm;

[0095] 2) Preparation of cooked film for repair

[0096] 2a) Thin pass: adjust the roller spacing of the rubber mixer to 0.2-0.6m, and carry out thin pass through the rubber mixer for the nitrile raw rubber material, and the number of thin pass is 3 to 4 times;

[0097]2b) Film output: Adjust the roller spacing of the rubber mixing machine, and output the film according to the thickness of 2.2mm and 1...

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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...

Claims

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Application Information

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IPC IPC(8): B29C73/10B29C73/24B29C73/26B29C73/30B29C73/32B29C35/00B29C35/02
CPCB29C35/007B29C35/02B29C73/10B29C73/24B29C73/26B29C73/30B29C73/32B29C2073/262B29C2073/266B29L2031/749
Inventor 肖雯静谭云水高李帅李天明刘宗清胡益太
Owner 湖北三江航天江北机械工程有限公司
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