Heat-proof sleeve as well as preparation method and forming device thereof

A heat-resistant sleeve and ablation-resistant technology, which is applied in the field of composite materials, can solve the problems of poor ablation resistance and poor flexibility of FRP heat-resistant sleeves, and achieve good flexibility, reduced size ablation, and good ablation resistance Effect

Active Publication Date: 2021-05-25
HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a heat shield and its preparation method and preparation device to solve the technical problems of poor flexibility and poor ablation resistance of the glass fiber reinforced plastic heat shield in the prior art

Method used

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  • Heat-proof sleeve as well as preparation method and forming device thereof
  • Heat-proof sleeve as well as preparation method and forming device thereof
  • Heat-proof sleeve as well as preparation method and forming device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 provides a kind of preparation method of heat shield, specifically as follows:

[0048] 1. Spray release agent:

[0049] Spray the film coating agent on the surface of the upper mold 2 and the surface of the lower mold 3 with a low-pressure spray gun, the number of times of spraying is 2 times, the interval time is 15min, and the spraying amount of the upper mold is 50g / m 2 , the total amount of spraying on the lower mold is 50g / m 2 .

[0050] 2. Layer:

[0051] Lay silicone rubber, quartz glass fiber reinforced silicone rubber, and zirconium boride particles with a particle size of ≤1 μm mixed with silicone rubber on the surface of the cavity of the lower mold 3 in sequence, and each layer is overlapped. The strength is staggered to form a heat-resistant layer 4 , a mechanically enhanced layer 5 and an ablation-resistant layer 6 .

[0052] 3. Mold closing:

[0053] Upper mold 2 and lower mold 3 are clamped.

[0054] 4. Vulcanization:

[0055] The cu...

Embodiment 2

[0059] Embodiment 2 provides a kind of preparation method of heat shield, specifically as follows:

[0060] 1. Spray release agent:

[0061] Use a low-pressure spray gun to spray the coating agent on the surface of the upper mold 2 and the surface of the lower mold 3, the number of sprays is 3 times, the interval is 16min, and the total spraying amount of the upper mold is 50g / m 2 , the total amount of spraying on the lower mold is 50g / m 2 .

[0062] 2. Layer:

[0063] Lay silicone rubber, quartz glass fiber reinforced glue, and zirconia particles with a particle size of ≤1 μm mixed with silicone rubber on the surface of the cavity of the lower mold 3 in sequence, and each layer is overlapped. The overlap width is 80mm, and the overlap strength between layers is staggered. , forming a heat-resistant layer 4 , a mechanically enhanced layer 5 and an ablation-resistant layer 6 .

[0064] 3. Mold closing:

[0065] Upper mold 2 and lower mold 3 are clamped.

[0066] 4. Vulcan...

Embodiment 3

[0071] Embodiment 3 provides a kind of preparation method of heat shield, specifically as follows:

[0072] 1. Spray release agent:

[0073] Spray the film coating agent on the surface of the upper mold 2 and the surface of the lower mold 3 with a low-pressure spray gun, the number of times of spraying is 3 times, the interval time is 16min, and the spraying amount of the upper mold is 45g / m 2 , the total amount of spraying on the lower mold is 45g / m 2 .

[0074] 2. Layer:

[0075] Lay silicone rubber, quartz glass fiber reinforced glue, zirconium boride particles with a particle size of ≤1 μm, and zirconia particles mixed with silicone rubber on the surface of the cavity of the lower mold 3 in sequence, and each layer is overlapped, and the overlap width is 80mm. The overlapping strength between layers is staggered to form a heat-resistant layer 4 , a mechanically enhanced layer 5 and an ablation-resistant layer 6 . Wherein, the mass ratio of zirconium boride particles to...

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Abstract

The invention provides a heat-proof sleeve as well as a preparation method and a forming device thereof. The heat-proof sleeve is annular and wavy in the diameter direction, and sequentially comprises a flexible layer, a mechanical enhancement layer and an ablation-resistant layer in the direction perpendicular to the annular direction, wherein the ablation-resistant layer is obtained by porcelainizing ceramic particles with the particle sizes being less than or equal to 1 mu m in silicon rubber. According to the heat-proof sleeve provided by the invention, the side temperature of the flexible layer is 64 to 70 DEG C, the heat-proof sleeve has good ablation resistance, the fracture elongation rate is 358 to 413 percent, and the flexibility is good.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a heat-resistant sleeve, a preparation method and a preparation device thereof. Background technique [0002] The heat-resistant sleeve can be used in the annular gap between the tail section and the engine nozzle to prevent the high-temperature fuel flow from the outlet of the nozzle from flowing back into the tail section cabin and to prevent heat at the bottom of the tail section during flight. [0003] At present, the heat shield is made of fiberglass, which is a rigid material, and the nozzle needs to swing when the engine is working, and the rigid material cannot make it work normally. At the same time, the temperature of the flame ejected from the nozzle is high, and the ordinary fiberglass material cannot meet the burning requirements. Eclipse requirements. Contents of the invention [0004] The invention provides a heat shield and its preparati...

Claims

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Application Information

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IPC IPC(8): F02K1/80B29C70/34B32B25/20B32B25/04B32B37/06B32B37/10
CPCF02K1/805B29C70/34B32B25/20B32B25/042B32B37/06B32B37/10B29L2031/749B32B2250/248B32B2307/3065
Inventor 艾进张天胤张权谢道成
Owner HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL
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