Composite adhesive film for propellant combustion chamber, propellant combustion chamber and manufacturing method

Abstract

The invention discloses a composite adhesive film for a propellant combustion chamber. The composite adhesive film for the propellant combustion chamber is used for achieving adhesion of a propellantgrain insulating layer and a shell insulating layer. The composite adhesive film comprises, by mass, 1-7 parts of framework materials and 40-200 parts of thixotrope. According to the composite adhesive film, the thixotrope serves as an adhesion agent, and the framework materials which are excellent in performance serve as a supporting framework, so that the composite adhesive film which has a certain mechanical strength and is free of sagging of an adhesive is formed. The composite adhesive film adheres to the outer surface of the propellant grain insulating layer and then is connected with the shell insulating layer in an adhesion mode, and therefore the adhesion quality of the propellant combustion chamber can be effectively guaranteed. When the composite adhesive film is adopted to conduct adhesion, the composite adhesive film has the advantages that the composite adhesive film on the adhesion surfaces of the propellant grain insulating layer and the shell insulating layer is uniformly laid, the adhesion process is simple, the adhesive cannot sag and can be solidified at the normal temperature, and the adhesion working time is greatly shortened.

Description

technical field [0001] The invention relates to the technical field of manufacturing solid rocket motors, in particular to a composite adhesive film for a charge combustion chamber, a charge combustion chamber and a manufacturing method. Background technique [0002] The bonding of the powder column and the shell of the charge combustion chamber is an important key process for solid engine charge. The outer surface of the charge column has a layer of charge insulation layer, and the inner surface of the shell has a layer of shell insulation layer. The column insulation is bonded to the shell insulation. The current bonding process of charge combustion chamber charge is: first apply adhesive on the surface of the heat insulating layer of the charge column, and then push the charge column into the shell to bond the heat insulating layer of the charge column to the heat insulating layer of the shell. This method has the following problems: [0003] (1) The manual glue brushin...

AI Technical Summary

Problems solved by technology

[0003] (1) The manual glue brushing process is time-consuming, labor-intensive and low in automation

It takes a long time to paint the entire adhesive surface manually, the operator has high labor intensity, and the operating experience is poor. Moreover, due to the high viscosity of the glue, the operating window time is short, and the manual glue application effect is poor.

[0004] (2) Due to the good fluidity of the glue, the phenomenon of hanging and dripping is serious. The thickness of the glue on the surface of the thermal insulation layer of the grain column is uneven, and it is easy to be thin at the top and thick at the bottom, which will lead to uneven bonding. Well, during the extrusion process of the powder column, it is difficult to control the extrusion strength

[0005] (3) Due to the large amount of glue dripping onto the ground or equipment, the operating environment is seriously damaged, and the follow-up cleaning work is intensive

Images