High-Pressure Vessel Reinforcement Layer Gap Control
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Solution Overview
Problem
Conventional high-pressure vessels experience a decrease in durability due to gaps formed between the inner and outer laminated portions at the converging portions, resulting from a significant thickness difference caused by varying inclination angles of band-shaped fibers, which compromises the reinforcement layer's strength.
Innovation Solution
The high-pressure vessel design incorporates a reinforcement layer with a specific condition where the difference in diameters of low helical layers' openings is equal to or greater than the band-shaped fiber's width, ensuring no significant thickness difference between the inner and outer laminated portions, thereby eliminating large gaps and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the inclination angle of band-shaped fiber is varied in the low helical layer, then the pressure resistance strength of the trunk portion is improved, but large gaps are formed at the converging portions, deteriorating durability
Solution Approach 1:
The patent applies local quality by differentiating the reinforcement structure between the trunk portion and converging portions. The low helical layer with specific inclination angles (5-30 degrees) is applied to the trunk portion to maximize pressure resistance, while the reinforcement layer is extended to sufficiently cover the converging portions. This localized differentiation ensures that each region has the appropriate reinforcement characteristics for its functional requirements, preventing gaps while maintaining overall durability.
Solution Approach 2:
The reinforcement layer is segmented into distinct functional zones: the low helical layer for the trunk portion and extended coverage for the converging portions. This segmentation allows independent optimization of each zone - the trunk portion receives helical winding for circumferential strength, while the converging portions receive extended coverage to prevent gap formation. The segmentation resolves the contradiction by assigning different reinforcement strategies to different spatial regions.
2Reliability
If the low helical layer is extended to cover the converging portions, then the durability is improved, but the thickness of the reinforcement layer increases
Solution Approach 1:
The patent employs parameter changes by optimizing the inclination angle of the band-shaped fiber within a specific range (5-30 degrees) for the low helical layer. This parameter optimization allows the reinforcement layer to achieve sufficient coverage of the converging portions while controlling the thickness increase. By carefully selecting inclination angles within this range, the design balances the need for extended coverage with the constraint of maintaining reasonable thickness, resolving the contradiction between durability improvement and thickness control.
Data Source
AI summary
A reinforcement layer of a high-pressure vessel has a plurality of low helical layers. In at least one of the (i−1)-th low helical layer and the i-th low helical layer, the difference between the diameter of an opening formed in an end portion of the (i−1)-th low helical layer and the diameter of an opening formed in an end portion of the i-th low helical layer is equal to or larger than the width of the band-shaped fiber when an inclination angle WA of the band-shaped fiber is equal to or smaller than a second angle smaller than a first angle.