High Pressure Tank Reinforcing Layer Winding Tension Control
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Solution Overview
Problem
Existing methods for manufacturing high pressure tanks result in a reinforcing layer with reduced breaking strength due to loose fibers in the inner layer, which can lead to delamination under repeated gas filling and releasing in hot and humid environments.
Innovation Solution
A method involving a winding process where a fiber bundle with a curable resin is wound around a hollow liner with a predetermined tension, and the tension is reduced towards the outer circumferential side of the reinforcing layer during the curing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tension of the fiber in the outer layer is set to be larger than that of the fiber in the inner layer, then delamination at the interface between layers can be suppressed, but the breaking strength of the reinforcing layer is reduced due to loosened inner layer fibers
Solution Approach 1:
The patent applies parameter changes by systematically adjusting the tension values for each layer during the winding process. Specifically, the inner layer is wound at a higher tension (e.g., 5-15 N) while the outer layer is wound at a lower tension (e.g., 0-5 N), reversing the conventional approach. This parameter optimization prevents fiber loosening in the inner layer while still maintaining adequate interlayer bonding, thereby achieving both high breaking strength and delamination resistance.
2Strength
If the fiber tension is increased to improve breaking strength, then the reinforcing layer becomes stronger, but fiber loosening occurs in the inner layer leading to reduced strength
Solution Approach 1:
The patent applies local quality by assigning different tension parameters to different layers of the reinforcing structure. The inner layer receives higher tension to prevent fiber loosening and maintain fiber tightness, while the outer layer receives lower tension to avoid excessive stress. This localized differentiation of tension parameters ensures that each layer contributes optimally to the overall breaking strength without compromising structural stability.
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 increases the breaking strength of the reinforcing layer and reduces variations in breaking strength, enhancing the reliability and durability of the high pressure tank.
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 hollow liner, 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 tension of the fiber bundle is reduced toward an outer circumferential side of the reinforcing layer.