Filament Winding Pressure Control to Prevent Liner-Fiber Gaps
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Solution Overview
Problem
Conventional filament winding methods fail to maintain a balance between the internal pressure of the liner and the winding force of the fiber member, leading to potential gaps between the fiber layer and the liner, which compromises the pressure resistance of the gas tank.
Innovation Solution
A filament winding device and method that includes an acquisition unit to measure the outer dimensions of the fiber layer and a pressure control unit to adjust the internal pressure of the liner, ensuring the dimensions align with predetermined target values during the winding process, thereby maintaining a balance between internal pressure and winding force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the internal pressure of the liner is simply pressurized during winding, then the liner is prevented from being crushed inward, but gaps form between the fiber layer and the liner after winding
Solution Approach 1:
The patent implements feedback control by continuously monitoring the outer dimension of the fiber layer during winding and adjusting the internal pressure of the liner based on the deviation from the target dimension. The pressure control unit modifies the internal pressure in real-time according to the measured outer dimension, ensuring the fiber layer maintains proper contact with the liner throughout the winding process, thereby preventing gap formation while maintaining pressure resistance
Solution Approach 2:
The patent dynamically changes the internal pressure parameter during the winding process based on the measured outer dimension of the fiber layer. By adjusting the pressure parameter in response to dimensional variations, the system maintains optimal contact between the fiber layer and liner, preventing gap formation while ensuring sufficient pressure resistance of the final gas tank structure
2Ease of manufacture
If the outer dimension of the fiber layer is not controlled during winding, then the winding process is simple, but the balance between internal pressure and winding force cannot be maintained
Solution Approach 1:
The patent employs feedback control where the outer dimension of the fiber layer is continuously measured during winding, and this measurement is fed back to the pressure control unit. The system automatically adjusts the internal pressure based on the measured dimension, maintaining the proper balance between internal pressure and winding force without requiring complex manual intervention, thus preserving ease of manufacture while ensuring compositional stability
Solution Approach 2:
The winding system performs self-adjustment by automatically monitoring its own outer dimension and regulating its internal pressure accordingly. The pressure control unit uses the measured dimensional data to autonomously maintain the balance between internal pressure and winding force, enabling the system to self-correct without external intervention and maintaining both simplicity and 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 approach effectively suppresses the formation of gaps between the fiber layer and the liner, enabling the production of gas tanks with sufficient pressure resistance.
Implementation Method 1
a pressure control unit configured to control an internal pressure of the liner in a manner so that the outer dimension approaches a predetermined target value, during winding of the fiber member
Implementation Method 2
an acquisition unit configured to acquire a physical quantity indicating an outer dimension of a fiber layer formed by winding the fiber member around the liner
Data Source
AI summary
A filament winding device winds a fiber member on an outer peripheral surface of a hollow resin liner in a state where the inside of the liner is pressurized. The filament winding device includes an acquisition unit that acquires a physical quantity indicating an outer dimension of a fiber layer formed by winding the fiber member around the liner, during winding of the fiber member, and a pressure control unit that controls an internal pressure of the liner in a manner so that the outer dimension approaches a predetermined target value, during winding of the fiber member.