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Polystyrene spray plug for solid rocket engine and foaming method thereof

A technology of solid rocket and polystyrene, which is applied in the field of polystyrene injection plugging and foaming for solid rocket motors. It can solve the problems of long foaming time, low heat exchange efficiency, and inability to produce injection plugging, etc., and achieve foaming The effect of short time, high foaming rate and high production efficiency

Pending Publication Date: 2020-05-22
西安现代控制技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional injection plugging production usually adopts the boiling process, which has the advantages of stable temperature and easy operation, but due to the low heat transfer efficiency, it cannot produce density lower than 0.3g / cm 3 Injection blockage, long foaming time (>60min), low efficiency

Method used

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  • Polystyrene spray plug for solid rocket engine and foaming method thereof
  • Polystyrene spray plug for solid rocket engine and foaming method thereof
  • Polystyrene spray plug for solid rocket engine and foaming method thereof

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Experimental program
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Effect test

Embodiment 1

[0056] In this embodiment, include:

[0057] 1. Use water vapor as the heat source to heat the plugging mold.

[0058] 2. A steam foaming device is designed to realize spray plugging and foaming molding by adjusting the temperature, pressure and heating time of water vapor. Steam foaming device such as figure 1 As shown, the device is mainly composed of a steam generator and a foaming container. A steam generator is standard equipment and the steam temperature can be controlled via the control panel. The foaming container is equipped with a pressure gauge, a safety valve and a temperature measuring device, which can display the temperature and pressure in the foaming container in real time. The injection plugging mold is placed inside the foaming container, and multiple sets of molds can be placed at the same time. The steam generator and the foaming container are connected by a pipeline, and the gas flow can be controlled by a valve. Regulating the exhaust valve can regu...

Embodiment 2

[0060] In this embodiment, a certain type of solid rocket motor injection plugging is taken as an example to introduce the specific implementation mode. The shape of the injection plugging is as follows figure 2 shown.

[0061] 1. Weigh the expandable polystyrene according to the plugging requirements;

[0062] 2. Put the weighed raw materials into the aluminum foaming mold. The foaming mold is as follows: image 3 shown;

[0063] 3. Put the installed mold into the steam foaming device;

[0064] 4. Adjust the outlet temperature of the steam generator to 108±5°C;

[0065] 5. Adjust the steam pressure in the foaming container between 0.1 and 0.3 MPa;

[0066] 6. Heating for 10 minutes;

[0067] 7. Take out the mold and air-cool, and take out the injection plug after the mold cools down.

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Abstract

The invention belongs to the technical field of solid rocket engines, and particularly relates to a polystyrene spray plug for a solid rocket engine and a foaming method thereof. According to the method, high-temperature steam generated by a steam generator is used for heating a foaming die, so that expandable polystyrene is heated and foamed into a product shape. Rapid foaming is realized by controlling steam temperature, pressure and flow, and foaming of the low-density spray plug is realized. Compared with a water boiling process, the process has the advantages of high foaming rate, short foaming time and high production efficiency.

Description

technical field [0001] The invention belongs to the technical field of solid rocket motors, and in particular relates to a polystyrene injection plug for solid rocket motors and a foaming method thereof. Background technique [0002] The nozzle plug is an important part of the solid rocket motor, and it is usually installed in the throat liner of the nozzle. On the one hand, injection plugging plays the role of building pressure at the initial stage of engine ignition, and on the other hand, it plays the role of sealing and moisture-proof. Expandable polystyrene (EPS) is a polystyrene and styrene copolymer containing a blowing agent (low boiling point hydrocarbon). The engine injection plug produced by it has the advantages of low density, good sealing performance, moisture resistance, and no ejection after the plug is broken. [0003] The traditional injection plugging production usually adopts the boiling process, which has the advantages of stable temperature and easy o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/02B29C44/60B29C44/34
CPCB29C44/02B29C44/3415B29C44/60
Inventor 付佺潘成刚白强来鲁思澄姚胜严欧鹏
Owner 西安现代控制技术研究所
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