Boss Assembly Dome Reinforcement for Pressure Vessels
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Solution Overview
Problem
Current pressure vessel manufacturing methods require excessive fiber material and increase assembly operations to reinforce dome regions, leading to higher production costs and time, while also complicating the assembly process.
Innovation Solution
A boss assembly with a dome reinforcement part made of fiber-reinforced composite material is mechanically coupled to a boss part, using securing means like axial abutment portions or adhesive elements, allowing for a single-step mounting and reducing assembly clearances and operations, thereby optimizing fiber usage and production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If helical layers are used to reinforce the domes of the pressure vessel, then the pressure strength in axial direction is improved, but the fiber material consumption increases significantly
Solution Approach 1:
The reinforcement structure is segmented into two distinct parts: a boss part and a dome reinforcement part. The dome reinforcement part is specifically designed to cover only the dome region, allowing targeted reinforcement without applying helical layers to the entire cylindrical portion. This segmentation enables reduced fiber material consumption while maintaining axial pressure strength where needed.
Solution Approach 2:
The dome reinforcement part is designed with specific local quality to address the unique reinforcement needs of the dome region. It features a curved upper surface matching the dome geometry and a lower surface for bonding to the boss part. This localized reinforcement approach provides necessary axial strength at the domes without requiring continuous helical winding over the entire vessel, thereby reducing overall fiber consumption.
2Manufacturing precision
If the pole cap reinforcement layer is applied after mounting the polar boss, then the reinforcement can be targeted, but the number of assembly operations and clearances increases
Solution Approach 1:
The boss part and dome reinforcement part are merged into a single integrated component. The dome reinforcement part is mechanically coupled to the boss part during fabrication, creating a unified boss assembly. This merging eliminates the need for separate assembly operations and reduces the number of assembly clearances, while still providing targeted reinforcement at the dome region.
Solution Approach 2:
The dome reinforcement part is preliminarily formed and mechanically coupled to the boss part during the boss assembly fabrication process, before the final assembly operation. This preliminary action integrates the reinforcement function into the boss assembly itself, eliminating the need for subsequent separate reinforcement application steps and reducing overall assembly complexity.
3Productivity
If continuous winding process is used for helical layers, then the production is simplified, but the fiber material usage in central portion increases
Solution Approach 1:
The reinforcement structure is segmented such that the dome reinforcement part covers only the dome region and is mechanically coupled to the boss part, rather than using continuous helical winding over the entire cylindrical portion. This segmentation maintains production efficiency by creating a pre-integrated component while significantly reducing fiber material usage in the central portion where full helical coverage is not required.
Data Source
AI summary
A boss assembly may be configured for a pressure vessel having a liner defining a fluid storage chamber and a composite shell enclosing or encasing the liner. Such a boss assembly may include a dome reinforcement part made of fiber-reinforced composite material coupled to a boss part. The dome reinforcement part may be configured to be covered by the composite shell and configured to cover a dome portion of the liner. The boss part may be mechanically coupled to the dome reinforcement part during the dome reinforcement part fabrication.