High-Pressure Gas Tank Cap Structure to Prevent Liner Deformation
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Solution Overview
Problem
High-pressure gas tanks face deformation issues due to gas pressure causing idle rotation of the cap relative to the liner during filament winding, which can lead to liner deformation and instability.
Innovation Solution
A rotation restricting structure comprising a first rotation restricting portion on the inner surface of the liner and a second rotation restricting portion on the cap, which are connected to prevent cap rotation, ensuring efficient transmission of rotational force during filament winding without deforming the liner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotation restricting structure is provided on the outer surface of the liner, then cap idle rotation is suppressed, but the liner is deformed by gas pressure filling the gap between rotation restricting portions
Solution Approach 1:
The rotation restricting portions are inverted from the conventional outer surface placement to the inner surface placement. The first rotation restricting portion is provided on the inner surface of the liner, and the second rotation restricting portion is provided on the inner surface of the cap, creating an inverted configuration that prevents gas pressure from deforming the liner while maintaining rotation restriction functionality
Solution Approach 2:
The rotation restricting structure is segmented into two separate components: a first rotation restricting portion on the liner and a second rotation restricting portion on the cap. This segmentation allows each component to be optimized independently and enables the inverted configuration where the portions engage from opposite sides of the liner wall
2Ease of manufacture
If the cap is allowed to rotate freely during filament winding, then the winding process is simpler, but the liner becomes deformed and the gas tank loses stability
Solution Approach 1:
The rotation restricting portions are preliminarily configured on the liner and cap before the filament winding process begins. This preliminary configuration ensures that when rotational force is applied during winding, the cap cannot rotate idle relative to the liner, thereby maintaining liner stability and shape throughout the winding process
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 rotation restricting structure effectively suppresses cap idle rotation, preventing liner deformation and ensuring stable filament winding, thereby enhancing the structural integrity and operational reliability of the high-pressure gas tank.
Implementation Method 1
a rotation restricting structure configured to restrict rotation of the cap relative to the liner about an axis of the liner
Implementation Method 2
a reinforcing layer made of fiber-reinforced resin, and a cap. The liner has a filling chamber that can be filled with gas. The reinforcing layer covers the outer surface of the liner to reinforce the liner
Data Source
AI summary
A cap of a high-pressure gas tank includes a first member and a second member. The first member is located on the inner side of a liner. The second member is located on the outer side of the liner and is connected to the first member. A rotation restricting structure includes a first rotation restricting portion and a second rotation restricting portion. The first rotation restricting portion is provided on an inner surface of the liner. The second rotation restricting portion is provided on the first member so as to be fitted into the first rotation restricting portion.