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Thermoplastic composite cryogenic liquid oxygen storage tank body with gradient resin layer and manufacturing method thereof

A composite material and thermoplastic resin technology, which is applied in the field of aerospace transportation, can solve the problems such as the leakage of small molecules of liquid oxygen compatible fuel in the resin matrix that has not been well solved, and achieve the effect of reducing leakage.

Active Publication Date: 2020-12-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are three main problems in the storage tank under this working environment: (1) low-temperature loading: small fuel molecules permeate the composite material, and small molecules leak from the seepage channel formed by the micro-cracks inside the composite material; (2) chemical compatibility : Liquid oxygen has strong oxidizing properties. As an organic material, the composite material must have the ability not to be oxidized by liquid oxygen; (3) Low-temperature mechanical properties: The storage tank of the composite material is in an ultra-low temperature environment, so it needs to have excellent low-temperature mechanical properties
[0003] For the research on composite materials of tanks, at present, more attention is paid to fiber-reinforced thermosetting resin-based composite materials, but the liquid oxygen compatibility of the resin matrix and the leakage of small fuel molecules have not been well resolved.

Method used

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  • Thermoplastic composite cryogenic liquid oxygen storage tank body with gradient resin layer and manufacturing method thereof
  • Thermoplastic composite cryogenic liquid oxygen storage tank body with gradient resin layer and manufacturing method thereof
  • Thermoplastic composite cryogenic liquid oxygen storage tank body with gradient resin layer and manufacturing method thereof

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Embodiment 1

[0024] A method for manufacturing a thermoplastic composite cryogenic liquid oxygen storage tank body with a gradient resin layer, comprising the following steps:

[0025] 1. Determination of the production process of resin gradient prepreg tape by solution impregnation method: polyethersulfone, polyetherimide, and polyether ether ketone resins are soluble in some polar solvents, so thermoplastic prepreg tapes can be prepared by solution impregnation method . Taking the molding of polyethersulfone resin (PES) prepreg tape as an example, the PES resin can be dissolved in a good PES solvent such as dimethyl sulfoxide and N-methylpyrrolidone to obtain resin solutions with different concentrations. In this embodiment, N-methylpyrrolidone was used to prepare solutions with a mass fraction of PES of 10-60% under the condition of heating in an oil bath at 100°C.

[0026] 2. Forming of prepreg tape: By changing the concentration of thermoplastic resin solution, impregnation speed and...

Embodiment 2

[0031] A method for manufacturing a thermoplastic composite cryogenic liquid oxygen storage tank body with a gradient resin layer, comprising the following steps:

[0032] 1. Determination of the production process of the hot-melt resin gradient gradient prepreg tape: almost all thermoplastic resins can be prepared by the hot-melt method to prepare thermoplastic resin-based prepreg tapes. Taking polyfluororesin (PFA) as an example, a thermoplastic prepreg tape with gradient thermal resin was prepared.

[0033]2. Forming of resin gradient gradient thermoplastic prepreg tape: Taking a prepreg tape with a length of 100m, a width of 1m and a thickness of 0.3mm as an example, the resin gradient concentration range and length distribution of the prepreg tape are: 0-10m, resin Content 60%; 10-30m, resin content 50%; 30-100m, resin content 40%. The specific production method is that 200 carbon fiber tows are arranged and passed through the die of the extruder. The temperature of the ...

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Abstract

The invention discloses a thermoplastic composite low-temperature liquid oxygen storage tank barrel with a gradient resin layer and a manufacturing method thereof. Thermoplastic resin with liquid oxygen compatibility and excellent mechanical properties is used as a resin matrix of a composite storage tank; a composite storage tank barrel structure with a resin content gradually changing in a gradient mode is manufactured through an automatic laying process; and the purpose of blocking leakage of small molecules of a fuel is achieved by constructing the gradient resin layer.

Description

technical field [0001] The invention belongs to the field of aerospace transportation, and in particular relates to the structural design of a storage tank of a carrier rocket ultra-low temperature propellant composite material Background technique [0002] The propellant tank is a key component of the power system and structural system of a space vehicle, and its lightweight level determines the main performance indicators of the vehicle. Composite materialization of propellant tanks can reduce the weight of the current aluminum alloy tanks by 20%-40%, which can meet the needs of the next generation of deep space exploration technology and can reduce costs. Composite materials for propellant tanks are not only required to be structurally efficient, but also must be able to hold ultra-low temperature propellants (liquid hydrogen: 40k, liquid oxygen: 90k). There are three main problems in the storage tank under this working environment: (1) low-temperature loading: small fue...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/16C08L81/06C08L79/08C08L27/18C08K7/06B32B27/04B32B27/08B32B27/28B32B33/00F02K9/60
CPCB32B27/08B32B27/28B32B27/285B32B27/286B32B2260/021B32B2260/046B32B2262/106C08K7/06C08L2201/02F02K9/605C08L61/16C08L81/06C08L79/08C08L27/18
Inventor 武湛君陈铎李世超王宏宇刘新孙涛
Owner DALIAN UNIV OF TECH