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Semi-U-shaped groove injection filling sealing method

A U-shaped, filling technology, applied in the direction of coating, etc., can solve the problems of large deformation and achieve good air tightness

Active Publication Date: 2021-12-31
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

[0003] However, due to the space design requirements of the engine, the outer dimensions of the nozzle seat shell are designed to be a structure that will undergo a large deformation after bearing pressure, specifically as figure 1 shown

Method used

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  • Semi-U-shaped groove injection filling sealing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The semi-U-shaped groove injection filling and sealing method comprises the following steps:

[0032] A) Filler preparation and equipment debugging: The filler is unvulcanized hot-bonded nitrile rubber, and the mold 1 trial assembly and injection machine equipment debugging are completed;

[0033] B) Configure adhesive: configure two-component 730 adhesive, 730 adhesive is mixed by 730-1 adhesive and 730-2 adhesive, both 730-1 adhesive and 730-2 adhesive are common models on the market, among them, 730-1 adhesive The mass mixing ratio of 730-2 adhesive and 730-2 adhesive is 4:1, add along the wall during the mixing process, stir clockwise for 20 minutes, and let it stand until there are no bubbles in the mixed solution;

[0034] C) Applying adhesive: Apply two-component 730 adhesive in one direction on the bonding surface of the nozzle base shell 2 and the nozzle base insulation layer 3, and apply the half U-shaped adhesive on the nozzle base insulation layer 3. Brush ...

Embodiment 2

[0039] The semi-U-shaped groove injection filling and sealing method comprises the following steps:

[0040] A) Filler preparation and equipment debugging: The filler is unvulcanized hot-bonded nitrile rubber, and the mold 1 trial assembly and injection machine equipment debugging are completed;

[0041] B) Adhesive preparation: configure two-component 730 adhesive, 730 adhesive is mixed by 730-1 adhesive and 730-2 adhesive, wherein, the mass mixing ratio of 730-1 adhesive and 730-2 adhesive is 3:1, the mixing process Add along the wall, stir clockwise for 30 minutes, and let it stand until there are no bubbles in the mixture;

[0042] C) Applying adhesive: Apply two-component 730 adhesive three times in one direction on the bonding surface of the nozzle base shell 2 and the nozzle base insulation layer 3, and apply the half U-shaped adhesive on the nozzle base insulation layer 3. Brush the two-component 730 adhesive three times in one direction on the groove surface of the g...

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Abstract

The invention relates to the technical field of spaceflight spray pipe production, and discloses a semi-U-shaped groove injection filling sealing method which comprises the following steps of filler preparation and equipment debugging, adhesive preparation, adhesive brushing, mold placing, heating curing and detection. According to the semi-U-shaped groove injection filling sealing method, it is guaranteed that a matching face of a spray pipe base assembly is not debonded, and therefore the good air tightness of the matching face is obtained.

Description

technical field [0001] The invention relates to the technical field of aerospace nozzle production, in particular to a semi-U-shaped groove injection filling and sealing method. Background technique [0002] The working principle of the solid rocket motor is the process of converting the heat energy of the gas generated by the combustion of the propellant in the combustion chamber into the kinetic energy of the gas flow through the energy replacement device - the nozzle, and obtaining the expected thrust under the reaction force. In the process of forming a huge thrust, the heat insulation layer of the nozzle seat inside the combustion chamber is subjected to the harsh environment of high temperature, high-speed ion scouring and high pressure on the nozzle seat shell. In this environment, the nozzle seat assembly needs to have a good Air-tightness, to avoid high-temperature gas overflowing from the joint surface of the nozzle base shell and the nozzle base heat insulation la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B29C45/17
CPCB29C45/14008B29C45/1418B29C45/17B29C2045/14237
Inventor 龙小裕陈祥晏述亮李俊王付青云曾建
Owner 湖北三江航天江北机械工程有限公司