A method for filling the adiabatic diffusion section of a solid rocket motor

A technology of solid rocket and diffusion section, which is applied in the field of perfusion in the adiabatic diffusion section of solid rocket motor, which can solve problems such as difficult elimination of bubble defects, low fiber content of products, and unbalanced resin flow, so as to facilitate popularization and implementation and increase fiber volume fraction , The effect of reducing processing costs

Active Publication Date: 2018-10-19
北京玻钢院复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional VARTM process technology also has some shortcomings, such as difficult mold sealing, low fiber content of the product, uneven flow of resin in the mold cavity with large area and complex structure, and difficult to eliminate bubble defects, etc.

Method used

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  • A method for filling the adiabatic diffusion section of a solid rocket motor

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Comparison scheme
Effect test

Embodiment 1

[0077] The adiabatic diffusion section of the solid rocket motor is fabricated by the silicone soft mold assisted VARTM infusion method. In the present invention, pure carbon fiber fabric is used as a reinforcing body for the heat-insulating diffusion section, and the resin is RTM phenolic resin. The expanded silicone soft mold 2 used in the production is 21mm thick, the inner diameter of the small end is 67.5mm, the inner diameter of the large end is 126mm, and the height is 91mm. During the heating process, the pressure gauge installed outside the mold showed that the applied pressure was 1 MPa.

[0078] The specific implementation steps of the above-mentioned method for forming the adiabatic diffusion section are as follows:

[0079] 1) Production of silicone soft mold. Select the metal male mold 1 with a small end diameter of 67.5 mm, a large end diameter of 126 mm, and a height of 91 mm. Apply the release agent to the metal mold, and wait for the solvent to volatilize ...

example 2

[0090] The silica gel soft mold assisted VARTM perfusion molding method involved in the present invention is similar to the method described in Example 1, and the same steps will not be repeated. The differences are:

[0091] The reinforcement used to make the thermal insulation diffusion section is composite braided carbon fiber and high-silica fiber, in which the carbon fiber is 15mm thick, and the high-silica fiber is covered on the outside of the carbon fiber with a thickness of 5mm.

[0092] The metal male mold 1 used for forming the silicone soft mold has a small end diameter of 66.5mm, a large end diameter of 125mm, and a height of 91mm, and the obtained silicone soft mold has a thickness of 22mm.

[0093] The silicone soft mold assisted VARTM infusion molding method is the same as that of Example 1, and will not be repeated here. The differences are:

[0094] In step 1), select the mold metal male mold 1 with a small end diameter of 66.5 mm, a large end diameter of 1...

example 3

[0100] The silica gel soft mold assisted VARTM perfusion molding method involved in the present invention is similar to the method described in Example 1, and the same steps will not be repeated. The differences are:

[0101] The reinforcement used to make the heat-insulating diffusion section is braided with high silica fiber, and the thickness of the carbon fiber is 20mm.

[0102] The metal male mold 1 used for forming the silicone soft mold has a small end diameter of 64.5mm, a large end diameter of 123mm, and a height of 91mm, and the obtained silicone soft mold has a thickness of 24mm.

[0103] The silicone soft mold assisted VARTM infusion molding method is the same as that of Example 1, and will not be repeated here. The differences are:

[0104] In step 1), select the mold metal male mold 1 with a small end diameter of 64.5 mm, a large end diameter of 123 mm, and a height of 91 mm. The release agent was applied three times to the metal mold. During production, the ...

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Abstract

The invention relates to a solid rocket engine adiabatic diffusion section perfusion method including the following steps: an adiabatic diffusion section reinforcement body is placed in an expansion silicone rubber soft mold, wherein the adiabatic diffusion section reinforcement body is placed in the expansion silicone rubber soft mold, wherein the adiabatic diffusion section reinforcement body is sleevedly arranged on a metal male mold, and a composite female mold is sleevedly arranged on the adiabatic diffusion section reinforcement body; the adiabatic diffusion section reinforcement body is perfused with ablation-resistance resin; the mold is heated, and the expansion silicone rubber soft mold expands and extrudes the adiabatic diffusion section reinforcement body during the heating process. The method has the beneficial effects that the defects that bubbles are not easy to discharge, the fiber content of products is low and the like in a molding process of simply using VARTM are overcome, the fiber volume fraction of an adiabatic diffusion section and the component density and surface quality are improved, and the mechanical properties are ultimately improved; and in addition, the method is simple in process, no additional increase of too much cost is required, and processing and molding can be achieved by the prior art.

Description

technical field [0001] The invention relates to a pouring method, in particular to a pouring method for the adiabatic diffusion section of a solid rocket motor. Background technique [0002] The adiabatic diffusion section of the rocket engine is a component that converts the heat energy inside the rocket engine into kinetic energy of the rocket, and has an important influence on the total impulse of the engine. The ablation stability of the adiabatic diffusion section greatly affects the working performance of the rocket engine and even affects the success or failure of the rocket flight. The traditional carbon fiber / phenolic resin tape winding products have the characteristics of weak interlayer strength of the premix, which leads to the disadvantages of easy erosion and burn-through of weak parts during the working process. [0003] Because the fibers in the braided reinforcement are twisted and entangled with each other, its torsional stability, impact resistance, shear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/48B29C70/54B29C33/38
Inventor 杨凯孙超明赵卫生谈娟娟张翠妙王思琪
Owner 北京玻钢院复合材料有限公司
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