Nozzle with non-weft cloth punched throat liner

A technology without weft cloth and throat liner, which is applied in the field of solid rocket motor nozzles, can solve the problems that the nozzles are difficult to meet the needs of mass production of tactical missiles, the cost of carbon/carbon composite materials is high, and the working pressure of the engine is long. Achieve the effect of high degree of completion, low cost and short production cycle

Active Publication Date: 2019-01-11
XIAN AEROSPACE PROPULSION TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of solid tactical missiles, the working pressure of the engine is higher, the time is longer, and the scale of the nozzle throat liner is larger. The T705 graphite material, which was preferred in the past, is no longer available due to reasons such as low performance, large data fluctuations, and many internal defects. To meet the requirements of use, the cost of carbon / carbon composite materials used in strategic missiles is extremely expensive, and the production cycle is about 201 days, resulting in low production efficiency of the throat liner, making it difficult for the nozzle to meet the needs of mass production of tactical missiles

Method used

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  • Nozzle with non-weft cloth punched throat liner
  • Nozzle with non-weft cloth punched throat liner
  • Nozzle with non-weft cloth punched throat liner

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Experimental program
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Embodiment Construction

[0021] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0022] The invention provides a needle-punched throat liner nozzle without weft cloth, such as figure 1 As shown, it includes a fixed body insulation layer 1 , a back wall insulation layer 2 , a throat liner 3 , an expansion section insulation layer 4 , a sealing ring 5 and a nozzle housing 6 .

[0023] Such as figure 2 As shown, the throat liner 3 is a segmented structure, which is divided into the front segment 7 of the throat liner and the rear segment 8 of the throat liner. The segmented position is within the range of 3 mm to 5 mm from the column structure 9 to the outlet of the nozzle, that is, L3 is in the range of 3 mm to 5 mm. Inside, the axial stress of the throat lining 3 can be effectively reduced, thereby greatly improving the safety margin of the throat lining 3. The ratio of the length of the throat liner 3 to the thickness of the column ...

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PUM

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Abstract

The invention discloses a nozzle with a non-weft cloth punched throat liner. The nozzle comprises a nozzle shell, the throat liner and a thermal insulation layer, wherein the throat liner is arrangedat an inlet of the nozzle shell, and the thermal insulation layer is arranged between the throat liner and the nozzle shell; the throat liner is of a segmental structure, a segmented part is within the range of 3-5mm from a column segment structure to an outlet of the nozzle, and the ratio of the length of the throat liner and the thickness of the column segment structure is 3.11-3.5; and the throat liner is made of a non-weft cloth punched C / C composite material. The nozzle is short in production cycle, high in efficiency and low in cost and has good mechanical properties.

Description

technical field [0001] The invention relates to the technical field of solid rocket motor nozzles, in particular to a weft-free needle-punched throat liner nozzle. Background technique [0002] The throat liner is a key part of the nozzle of a solid engine. It withstands the erosion of high-temperature and high-pressure gas. The working environment is very harsh. The convective heat transfer intensity near the throat liner is the most intense in the entire nozzle structure. If the stress exceeds the strength limit, the throat liner will break and fly out. At the same time, the test failures related to the throat liner account for more than 50% of the total engine failures. Therefore, the throat liner is particularly important to the quality of the nozzle. [0003] The selection of materials for throat lining is extremely strict, and the index requirements are mainly reflected in the following aspects: mechanical properties, thermophysical properties, and anti-ablation perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K9/97
CPCF02K9/974
Inventor 李鑫刘雨李国才汪海滨武玘张浩哲吕江彦卢颖
Owner XIAN AEROSPACE PROPULSION TECH INST
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