Variable Tension Winding for High Pressure Tank Reinforcing Layer
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Solution Overview
Problem
In the manufacturing of high pressure tanks, the winding of fiber bundles can collapse at the end portions of the body portion, reducing the breaking strength of the reinforcing layer.
Innovation Solution
A method involving a winding process where the fiber bundle is wound around the outer surface of a liner with predetermined tension, and the tension at the end portions is lower than at the general body portion, ensuring the reinforcing layer is formed with increased breaking strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the fiber bundle is wound with uniform tension along the entire body portion, then the winding process is simple, but the winding collapses at the end portions reducing breaking strength
Solution Approach 1:
The patent applies different tension values to different portions of the fiber bundle winding process. Specifically, the first portion (end portions of the body portion) is wound with a first tension, while the second portion (general portion between end portions) is wound with a second tension that is higher than the first tension. This local differentiation prevents collapse at the end portions while maintaining structural integrity throughout the tank.
2Strength
If the tension of fiber bundle is increased to prevent winding collapse, then the breaking strength increases, but the winding process becomes more difficult to control
Solution Approach 1:
The patent divides the body portion of the liner into two distinct portions: a first portion comprising end portions and a second portion comprising a general portion between the end portions. The fiber bundle is wound with different tensions for each portion, with the second tension being higher than the first tension. This segmentation allows optimized tension control for each region, preventing collapse where needed while maintaining overall process control.
3Reliability
If the fiber bundle is wound with low tension at end portions, then winding collapse is prevented, but the breaking strength at end portions may be reduced
Solution Approach 1:
The patent changes the tension parameter during the winding process based on the location being wound. The first tension applied to the end portions is optimized to prevent collapse while the second tension applied to the general portion is higher to ensure adequate breaking strength. This parameter change approach allows the process to adapt to local requirements, preventing collapse at vulnerable end portions while maintaining overall structural strength.
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
This method effectively prevents the collapse of the fiber bundle winding at the end portions, thereby reliably increasing the breaking strength of the reinforcing layer compared to conventional methods.
Implementation Method 1
a reinforcing layer forming process of forming the reinforcing layer by curing the curable resin contained in the fiber bundle wound around the outer surface
Data Source
AI summary
The present invention provides a method for manufacturing a high pressure tank having a reinforcing layer on an outer surface of a liner provided with dome portions at both end portions of a round tubular shaped body portion, the method including: a winding process of winding a fiber bundle containing a curable resin and having a predetermined tension on the outer surface of the liner; and a reinforcing layer forming process of forming the reinforcing layer by curing the curable resin contained in the fiber bundle wound around the outer surface, in which the winding process is performed so that the tensions of the fiber bundles at the both end portions are lower than a tension of the fiber bundle at a general portion of the body portion defined between the both end portions.