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Silicone rubber heat-insulating material for integral solid rocket ramjets and preparation method thereof

A solid impulse engine and thermal insulation material technology, which is applied in the field of silicone rubber thermal insulation materials for integrated solid impulse engines and its preparation, can solve problems such as poor elasticity, poor oxidation resistance, and burn-through, and achieve good elasticity and resistance to small molecules. The effect of strong migration ability

Active Publication Date: 2015-08-19
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] At present, EPDM insulation materials commonly used in solid rocket motors are difficult to use in oxygen-enriched environments due to their poor oxidation resistance; while hard insulation materials have good ablation resistance, but poor elasticity, and are suitable for high temperature and high pressure environments. In the working environment of particle scouring, it is easy to crack and be burned through

Method used

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  • Silicone rubber heat-insulating material for integral solid rocket ramjets and preparation method thereof
  • Silicone rubber heat-insulating material for integral solid rocket ramjets and preparation method thereof
  • Silicone rubber heat-insulating material for integral solid rocket ramjets and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] A silicone rubber heat insulating material for an integral solid-impact engine, the parts by weight of which are as follows:

[0027]

[0028] The above-mentioned preparation method of silicone rubber heat insulating material, it comprises the following steps:

[0029] 1) The surfaces of fumed silica, chopped carbon fibers with an average length of 6mm, nanoscale hafnium dioxide and graphene are all treated with γ-glycidoxypropyltrimethoxysiloxane and set aside;

[0030] 2) Add 20 parts of methyl vinyl silicone rubber, 80 parts of methyl vinyl phenyl silicone rubber, and 2 parts of butyltin dilaurate accelerator into a mixer according to the ratio of parts by weight to a transparent state, and prepare Silicone rubber matrix; wherein: the mass percentage content of vinyl in methyl vinyl silicone rubber is 0.2%, and the mass percentage content of phenyl in methyl vinyl phenyl silicone rubber is 10%;

[0031] 3) Add 40 parts of treated fumed silica, 5 parts of treated ...

Embodiment 2

[0037] A silicone rubber heat insulating material for an integral solid-impact engine, the parts by weight of which are as follows:

[0038]

[0039] The above-mentioned preparation method of silicone rubber heat insulating material, it comprises the following steps:

[0040] 1) The surfaces of fumed silica, chopped carbon fibers with an average length of 7mm, nanoscale hafnium dioxide and graphene are all treated with γ-glycidoxypropyltrimethoxysiloxane and set aside;

[0041] 2) Add 35 parts of methyl vinyl silicone rubber, 65 parts of methyl vinyl phenyl silicone rubber, and 1.6 parts of butyltin dilaurate accelerator into a mixer according to the ratio of parts by weight to a transparent state, and prepare Silicone rubber matrix; wherein: the mass percentage content of vinyl in methyl vinyl silicone rubber is 0.1%, and the mass percentage content of phenyl in methyl vinyl phenyl silicone rubber is 10%;

[0042] 3) 25 parts of treated fumed silica, 10 parts of treated c...

Embodiment 3

[0048] A silicone rubber heat insulating material for an integral solid-impact engine, the parts by weight of which are as follows:

[0049]

[0050] The above-mentioned preparation method of silicone rubber heat insulating material, it comprises the following steps:

[0051] 1) Treat fumed white carbon black, chopped carbon fibers with an average length of 6.5 mm, nanoscale hafnium dioxide and graphene through γ-glycidoxypropyl trimethoxysiloxane and set aside;

[0052]2) Add 50 parts of methyl vinyl silicone rubber, 70 parts of methyl vinyl phenyl silicone rubber, and 2 parts of butyltin dilaurate accelerator into a mixer according to the ratio of parts by weight to a transparent state, and prepare Silicone rubber matrix; wherein: the mass percentage content of vinyl in methyl vinyl silicone rubber is 0.2%, and the mass percentage content of phenyl in methyl vinyl phenyl silicone rubber is 11%;

[0053] 3) Add 30 parts of treated fumed silica, 8 parts of treated chopped ...

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Abstract

The invention discloses a silicone rubber heat-insulating material for integral solid rocket ramjets and a preparation method thereof. The silicone rubber heat-insulating material comprises the following components in parts by weight: 20-80 parts of methylvinyl silicone rubber, 20-80 parts of methylvinylphenyl silicone rubber, 1-3 parts of accelerator, 15-40 parts of silica white, 5-15 parts of chopped carbon fiber, 3-10 parts of graphene, 3-10 parts of hafnium oxide and 0.5-2 parts of vulcanizing agent. The silicone rubber heat-insulating material for integral solid rocket ramjets can form a high-melting-point ceramic-like layer in the ablation process, has the advantages of high temperature resistance, ablation resistance, favorable elasticity, high micromolecule migration resistance and the like, and can satisfy the operating environments of oxygen enrichment, high-temperature high-speed gas flow and particle erosion.

Description

technical field [0001] The invention belongs to the technical field of thermal protection of an afterburner chamber of an integral solid impulse engine, and in particular relates to a silicone rubber heat insulating material for an integral solid impulse engine and a preparation method thereof. Background technique [0002] Compared with other types of engines, the integral solid impulse engine has the best performance and unparalleled advantages in supersonic and even hypersonic conditions, and has the advantages of high specific impulse, simple structure, and full controllability. The afterburner of the integral solid-impulse engine is a dual-purpose combustion chamber. It is not only the combustion chamber of the booster engine, but also the afterburner of the ramjet engine. The working environment is extremely harsh. requirements are very stringent. Therefore, the thermal protection of the afterburner is particularly important. [0003] At present, EPDM insulation mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08K13/06C08K9/06C08K7/06C08K3/36C08K3/04C08K3/22C08K5/57B29C35/02
Inventor 尹正帅佘平江王芬雷宁高李帅张军
Owner 湖北三江航天江北机械工程有限公司
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