High Pressure Tank Liner Curing via Internal Pressure Control
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Solution Overview
Problem
High pressure tanks with fiber reinforced resin layers often experience gas permeation issues due to thermosetting resin oozing out and forming hole structures during curing, leading to communication between the inside and outside, which affects their integrity and gas permeability.
Innovation Solution
A method of manufacturing high pressure tanks involves winding a fiber reinforced resin around a liner, regulating the pressure inside the liner to a higher second pressure during the curing process, and maintaining this pressure to form gas permeation paths efficiently, using inert gases like helium and nitrogen to reduce oxidation and enhance gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thermosetting resin is cured by heating the fiber reinforced resin layer, then the resin layer is formed and cured, but gas permeation paths with hole structures are formed in the resin layer causing communication between inside and outside
Solution Approach 1:
The patent applies parameter changes by controlling the pressure inside the liner to be higher than the external pressure during the curing process. This pressure differential parameter change prevents the formation of hole structures in the resin layer by suppressing gas bubble formation and movement, thereby eliminating gas permeation paths while maintaining the cured resin layer structure.
Solution Approach 2:
The patent implements preliminary action by establishing the pressure differential condition before the curing process begins and maintaining it throughout the curing. By pre-setting the pressure environment before resin固化, the patent prevents harmful hole structure formation from occurring in the first place, rather than attempting to correct it after curing.
2Productivity
If the pressure in the liner is increased to a second pressure higher than the first pressure during temperature increase, then gas flow through the liner is enhanced and hole structures are formed, but the burden on the liner increases
Solution Approach 1:
The patent converts the potential harm of increased pressure burden on the liner into a beneficial effect by using the pressure differential to control gas flow direction and prevent harmful hole structure formation. The same pressure that could burden the liner is utilized to maintain resin layer integrity and achieve desired gas permeability characteristics through controlled gas flow.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively forms gas permeation paths in the resin layer, improving gas permeability and reducing the burden on the liner, while maintaining the integrity of the tank by controlling pressure and temperature, resulting in a more efficient and durable high pressure tank.
Implementation Method 1
increasing a temperature of the fiber reinforced resin layer and the resin layer to a predetermined temperature which is a temperature at which the thermosetting resin is cured
Implementation Method 2
The resin layer has a gas permeation path which is a hole structure which allows an inside and an outside to communicate with each other via the resin layer
Data Source
AI summary
A method of manufacturing a high pressure tank includes: preparing a liner; forming a fiber reinforced resin layer which is a layer of a fiber reinforced resin on an outer side of the liner, and forming a resin layer which is a layer formed of a portion of a thermosetting resin on an outer surface of the fiber reinforced resin layer; increasing a temperature of the fiber reinforced resin layer and the resin layer to a predetermined temperature which is a temperature at which the thermosetting resin is cured; causing a pressure in the liner to be regulated to be a second pressure higher than a first pressure which is a pressure in the liner in the forming of the fiber reinforced resin layer and the resin layer; and maintaining the temperature of the fiber reinforced resin layer and the resin layer at the predetermined temperature.