Rubber airbag for manufacturing heat insulating layer of engine

A technology of rubber airbag and thermal insulation layer, applied in the coating and other directions, can solve the problems of the flow direction of the raw material of the thermal insulation layer, the poor conformity of the profile of the thermal insulation layer, the deviation of the profile of the thermal insulation layer, etc. The effect of mechanical properties and production schedule guarantee

Inactive Publication Date: 2015-08-19
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The profile of the solid rocket motor insulation layer is relatively complex, including the cylinder section, the front head and the rear head. Through the airbag pressurized vulcanization process, the surface quality of the airbag determines the uniformity of the pressure transmitted by the airbag, and the pressure difference at each part will cause the flow direction and flow degree of the raw material of the heat insulation layer, which will eventually lead to local deformation of the heat insulation layer profile. deviation
Generally, airbag products made of butyl rubber are used. The ductility of this material is poor, and the pressure loss during use is greater than 0.4MPa. A serious quality failure occurred, resulting in the scrapping of the engine and huge economic losses, and the limit of the number of times the airbag can be used is 3

Method used

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  • Rubber airbag for manufacturing heat insulating layer of engine
  • Rubber airbag for manufacturing heat insulating layer of engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A rubber airbag used in the manufacture of engine insulation, such as figure 1 As shown, the capsule body 1 and the caps 2 at both ends are included, the thickness is 2mm, the capsule body 1 and the caps 2 are integrally formed, and one of the caps is provided with an inflator 3, and the inflator includes a T-shaped gas nozzle 31, T The T-shaped gas nozzle 31 is fixed on the head through the pressure plate 32 and the nut 33;

Embodiment 2

[0019] A rubber airbag used in the manufacture of engine insulation, such as figure 1 and figure 2 As shown, the capsule body 1 and the caps 2 at both ends are included, the thickness is 2mm, the capsule body 1 and the caps 2 are integrally formed, and one of the caps is provided with an inflator 3, and the inflator includes a T-shaped gas nozzle 31, T The T-shaped gas nozzle 31 is fixed on the head through the pressure plate 32 and the nut 33;

[0020] Wherein, the capsule is cylindrical, and its outer diameter is 99.5% of the minimum diameter of the cylinder section of the engine heat insulation layer to be formed.

[0021] The head is a part of an ellipsoid, the long radius of the ellipsoid is equal to the radius of the capsule body, and the short radius is the short radius of the head of the engine case to be processed minus the thickness of the heat insulation layer at the mouth of the head.

[0022] The total length of the airbag is 99.8% of the distance between the i...

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Abstract

The invention relates to a rubber airbag for manufacturing a heat insulating layer of an engine and belongs to the technical field of airbag manufacturing. The rubber airbag for manufacturing the heat insulating layer of the engine comprises a bag body and seal heads at the two ends thereof, wherein the thickness of the bag body is 2 to 4mm; the bag body and the seal heads are integrally formed; one seal head is provided with an inflating device; the inflating device comprises a T-shaped air nozzle, and the T-shaped air nozzle is fixed on the seal head through a pressing plate and a nut; threads are processed on the T-shaped air nozzle, and the threads are matched with the nut. During use, the pressure loss of the rubber airbag is smaller than 0.1MPa and the profile quality and surface smoothness of the heat insulating layer are remarkably improved; since no separating agent is used, interface defects caused by interface pollution are fundamentally eliminated and the product quality is obviously improved; since the difference between material systems of the airbag and the heat insulating layer is greater and the airbag is naturally separated from the heat insulating layer in the air extraction process during demolding, the labor intensity of an operator is reduced and the rubber airbag can be used at 150 DEG C for a long time; the goal of guaranteeing the profile of the heat insulating layer and the product quality of the engine can be achieved.

Description

technical field [0001] The invention belongs to the technical field of manufacturing heat-insulating layers of solid rocket motors, and in particular relates to a rubber airbag used for manufacturing heat-insulating layers of engines. Background technique [0002] The profile of the solid rocket motor insulation layer is relatively complex, including the cylinder section, the front head and the rear head. Through the airbag pressurized vulcanization process, the surface quality of the airbag determines the uniformity of the pressure transmitted by the airbag, and the pressure difference at each part will cause the flow direction and flow degree of the raw material of the heat insulation layer, which will eventually lead to local deformation of the heat insulation layer profile. deviation. Generally, airbag products made of butyl rubber are used. The ductility of this material is poor, and the pressure loss during use is greater than 0.4MPa. There was a serious quali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C37/00
Inventor 朱稼麟马自坤祝世杰杨瑞楼宋铭焦士六迟树平鲍明生陈丽萍刘丰华
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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