Pressurised Container Wedge Taper Support Ring Stress Distribution
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Solution Overview
Problem
Existing pressure vessels face challenges in achieving high reliability and cost-effectiveness with reduced manufacturing effort, as they often suffer from damaging stress peaks due to sharp deflection points and require complex designs to maintain long-term tightness under thermal and mechanical stresses.
Innovation Solution
A pressure vessel design featuring a wedge-like tapering outer support ring, either in one piece or composed of metal segments, that guides the inner support ring to create a common boundary wall for media supply and removal, intercepting relative movements and avoiding delamination between plastic jackets, while ensuring gentle force introduction and high rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a sharp deflection point of about 90° is created in the inner plastic jacket to accommodate the collar part, then the collar part can be integrated into the container structure, but damaging stress peaks occur that compromise the reliability of the plastic jacket
Solution Approach 1:
The sharp 90° deflection point in the inner plastic jacket is replaced by a smoothly curved transition zone with a radius of curvature of at least 5mm. This curvature eliminates stress concentration at the deflection point while maintaining the structural integration of the collar part, thereby resolving the contradiction between structural integration and stress resistance.
Solution Approach 2:
An intermediary support structure consisting of the outer plastic jacket and support ring is introduced between the collar part and the inner plastic jacket. This intermediary structure absorbs and distributes the mechanical stresses, preventing damaging stress peaks from reaching the inner plastic jacket while preserving the integrated collar design.
2Manufacturing precision
If an outer support ring with wedge-like taper is used to guide the jackets into coaxial arrangement, then alignment precision is improved, but the manufacturing complexity increases due to the complex geometry of the support ring
Solution Approach 1:
The outer support ring is segmented into multiple individual elements rather than being a single complex piece. These segments can be separately manufactured and then assembled, simplifying the manufacturing process while maintaining the wedge-like taper geometry needed for precise coaxial alignment of the jackets.
Solution Approach 2:
The wedge-like taper of the outer support ring is optimized with specific geometric parameters: a taper angle between 5° and 15°, and a length of the taper between 10mm and 50mm. These parameter optimizations achieve precise coaxial alignment while simplifying manufacturing compared to more complex support structures.
3Reliability
If multiple components are used to ensure long-term tightness under thermal and mechanical stresses, then sealing reliability is improved, but the manufacturing effort and production costs increase
Solution Approach 1:
Multiple sealing functions are merged into integrated sealing elements that are co-molded with the plastic jackets. The sealing profiles are directly formed as part of the jacket structure during the molding process, eliminating the need for separate sealing components and assembly steps while maintaining long-term tightness under thermal and mechanical stresses.
Solution Approach 2:
Sealing features and tightness-critical geometries are preliminary-formed during the molding process of the plastic jackets. This preliminary action ensures that sealing surfaces are precisely formed before assembly, reducing the need for additional manufacturing steps and post-assembly adjustments while guaranteeing long-term sealing reliability.
Data Source
AI summary
The invention relates to a pressurised container comprising two plastic casings (12, 14). The aim of the invention is to produce a leakproof container or storage arrangement which is economical to produce. To achieve this, a gap opening (24) between the casings (12, 14) extends up to a point, at which the casings (12,14) are positioned together in a coaxial manner and an external support ring (22) comprising a wedge-shaped tapering (28) extends to said point, said external support ring being embodied as an individual piece or comprising at least two metal, ring-shaped individual segments (28, 30).