High Pressure Tank Cap Flow Path and Repelling Coating
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Solution Overview
Problem
High pressure tanks with resin liners are prone to gas permeation, leading to pressure imbalances and potential buckling issues when filled with gas, as the gas accumulates between the liner and the reinforced layer, making it difficult to discharge the gas effectively.
Innovation Solution
A high pressure tank design featuring a cap with a flange section and an exposed flow path, along with repelling coatings on the liner and cap surfaces to prevent matrix resin from blocking the flow path, allowing easy discharge of gases between the liner and reinforced layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a resin liner is used in the high pressure tank, then the tank can be manufactured with lighter weight and lower cost, but the liner becomes easily permeated by gas leading to gas accumulation and buckling issues
Solution Approach 1:
The cap is divided into distinct functional sections: a flow path section with gas discharge holes for venting accumulated gas, and a flange section for structural support. This segmentation allows the cap to simultaneously handle both structural reinforcement and gas management functions, addressing the buckling issue caused by gas accumulation while maintaining the lightweight resin liner structure.
Solution Approach 2:
The flow path section acts as an intermediary mechanism between the liner interior and exterior, providing a controlled pathway for gas to escape from the accumulation space between the liner and reinforced layer. This mediator structure prevents direct pressure buildup that would cause buckling, while allowing the lightweight resin liner to remain in place.
2Reliability
If a flow path is formed in the cap to discharge accumulated gas, then gas can be vented from between the liner and reinforced layer, but the matrix resin may flow into and block the flow path opening
Solution Approach 1:
The flow path section is designed and positioned beforehand in the cap structure, creating a dedicated gas discharge通道 before the reinforced layer is applied. By pre-establishing this flow path with appropriate geometry and positioning, the design prevents matrix resin from blocking the opening, ensuring the gas discharge function remains reliable throughout the tank's service life.
Solution Approach 2:
The cap is designed with locally differentiated properties: the flow path section has specific geometric characteristics (hole size, passage shape) optimized for gas discharge, while the flange section provides structural support. This local quality differentiation ensures that the flow path remains open for gas venting while the overall cap structure maintains structural integrity and prevents resin intrusion.
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
The design ensures easy discharge of gases accumulated between the liner and reinforced layer, maintaining the tank's durability by preventing resin from blocking the flow path and reducing the risk of buckling and pressure imbalances.
Implementation Method 1
there being formed on at least one of the liner-side end surface, or a flange section-facing outer surface facing the flange section, of the liner a repelling coating that repels a matrix resin of the fiber-reinforced resin
Data Source
AI summary
A high pressure tank includes: a supplying/discharging hole; and a cap having formed therein a cap-side path which is a part of a flow path. A repelling coating interposes between a liner-side end surface facing a resin-made liner, of a flange section configuring the cap, or a flange section-facing outer surface facing the flange section, of the liner. The repelling coating is formed of a material that repels a matrix resin of a fiber-reinforced resin configuring a reinforced layer.