Composite Pressure Vessel Winding for Dome Slip Prevention
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Solution Overview
Problem
The existing methods for manufacturing pressure vessels with fiber-reinforced-plastic layers require reinforcing fibers to be wound at a specific angle along the geodesic line, limiting flexibility and increasing costs due to the need for excessive fiber usage to achieve desired strength.
Innovation Solution
A pressure vessel design where reinforcing fibers are wound interlaced around the domed parts and helically around the straight body part at a variable angle, allowing for flexibility in winding angles and reducing the amount of fibers required, while maintaining strength and continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reinforcing fibers are wound at a winding angle that runs along a geodesic line on the domed part to prevent slipping, then the reinforcing fibers are less likely to slip over the outer circumferential surface of the domed part, but no flexibility is allowed in setting the winding angle and a large amount of reinforcing fibers are required to achieve desired strength
Solution Approach 1:
The patent divides the vessel into three distinct reinforced sections: first domed part with interlaced winding, straight body part with helical winding, and second domed part with interlaced winding. This segmentation allows each section to use the most appropriate winding pattern for its geometric characteristics, preventing fiber slipping on domed parts while using efficient helical winding on the straight body part, thereby reducing total fiber consumption.
Solution Approach 2:
The patent applies different winding patterns to different local regions: interlaced winding is used specifically on the domed parts where fiber slipping is a concern, while helical winding is used on the straight body part where flexibility and strength efficiency are priorities. This local differentiation optimizes both slip prevention and fiber usage efficiency.
2Reliability
If reinforcing fibers are wound at a winding angle that runs along a geodesic line on the domed part, then the reinforcing fibers are less likely to slip over the outer circumferential surface of the domed part, but flexibility is not allowed in setting the winding angle around the vessel main body
Solution Approach 1:
The patent segments the winding process into distinct zones with different winding patterns. The straight body part allows flexible helical winding at various angles, while the domed parts use interlaced winding for slip prevention. This segmentation restores flexibility to the overall design while maintaining reliability at critical locations.
Solution Approach 2:
The patent applies interlaced winding locally only to the domed parts where slip prevention is critical, while allowing flexible helical winding with variable angles on the straight body part. This local application of different winding qualities maintains both reliability and adaptability.
3Strength
If a fabric woven from reinforcing fibers is provided as a reinforcing material between each domed part and the fiber-reinforced-plastic layer, then the structure provides reinforcement at the domed parts, but the manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates the separate fabric reinforcing layer from the structure. Instead, it uses directly wound interlaced reinforcing fibers on the domed parts to achieve the same reinforcement effect, thereby simplifying the manufacturing process and reducing costs while maintaining structural strength.
Solution Approach 2:
The patent uses the wound reinforcing fibers themselves to provide both the reinforcement function and the structural coverage. The interlaced winding pattern on the domed parts self-provides the reinforcement that would otherwise require a separate fabric layer, eliminating redundant materials and manufacturing steps.
Data Source
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AI summary
A pressure vessel (10) includes: a vessel main body (12) having a cylindrical straight body part (14), and domed parts (16, 18) respectively including hemispherical portions (16A, 18A) that have hemispherical shapes and are integrally formed at each end of the straight body part (14); a first reinforced section (26) formed by winding reinforcing fibers (20) around an outer circumferential surface of one domed part (16) such that the reinforcing fibers (20) are interlaced with each other; a second reinforced section (24) formed by winding the reinforcing fibers (20) helically around an outer circumferential surface of the straight body part (14), continuously from the first reinforced section (26); and a third reinforced section (28) formed by winding the reinforcing fibers (20) around an outer circumferential surface of the other domed part (18) such that the reinforcing fibers (20) are interlaced with each other, continuously from the second reinforced section (24).