Hybrid Fin Stabilizer with Metal-Plastic Composite Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fin stabilizers for watercraft are heavy due to their steel construction, which increases dead weight and reduces stability against bending and point loads, while also being prone to damage from torque and external forces.
Innovation Solution
A fin stabilizer with a hybrid construction combining a metal-based central structure for torque absorption and a plastic-based winding structure for flexibility, using steel for the central structure and carbon or glass fibers in a thermoplastic matrix for the winding, allowing for high stability and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel construction is used for fin stabilizers, then high strength and stability against torque are achieved, but weight increases significantly
Solution Approach 1:
The fin stabilizer employs a composite structure combining a metal-based central structure (for torque resistance) with a plastic-based wound structure (for weight reduction). This hybrid construction allows the fin to achieve the necessary mechanical strength while significantly reducing deadweight compared to traditional all-steel designs.
2Force
If traditional steel fins are used, then high torque resistance is achieved, but stability against bending and point loads decreases due to high deadweight
Solution Approach 1:
The composite construction combines the torque-resistant metal central structure with the lightweight plastic wound structure. The plastic winding provides high stability against bending and point loads while maintaining low weight, creating an optimized balance between different mechanical requirements.
3Strength
If steel construction is used, then structural integrity under external forces is maintained, but corrosion resistance deteriorates
Solution Approach 1:
The hybrid structure uses a metal central structure for structural integrity and a plastic outer wound structure that provides corrosion resistance. The plastic layer acts as a protective barrier against corrosive environments while the metal core maintains mechanical strength.
Solution Approach 2:
The plastic wound structure can be applied as a protective coating that replaces the need for complex corrosion protection systems on traditional steel fins, simplifying maintenance and extending service life in corrosive marine environments.
4Weight of moving object
If plastic construction is used for the entire fin, then weight is reduced, but torque transmission reliability deteriorates
Solution Approach 1:
The fin stabilizer uses a metal-based central structure specifically designed to receive and transmit torque from the fin drive reliably. The plastic wound structure is applied around this central structure, providing weight reduction while the metal core ensures dependable torque transmission to the watercraft stabilizing surfaces.
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
The hybrid construction effectively counteracts rolling movements with reduced weight, providing high stability against bending and point loads, while being resistant to torque and external forces, and allowing for simplified assembly and reduced corrosion risks.
Implementation Method 1
The fiber strands of the wound structure have a shaping and load-bearing function and, when cured, form rods which, in combination with their intersecting paths, form a framework that enables the transmission of torque and force to stabilizer sections beyond the central structure. The fiber strands are preferably made of resin-impregnated carbon fibers, glass fibers, aramid fibers, and the like. From a manufacturing perspective, the resin or plastic matrix is preferably thermoplastic-based, but can also be thermoset-based.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention discloses a vessel fin stabilizer for stabilizing a water vessel. The fin stabilizer has at least a fin having a hybrid structure formed by metal and plastic, wherein the hybrid structure has a reinforcing structure with a metal-based center structure and a plastic-based winding structure, and the center structure has a connection device for establishing effective connection and conductive torque with a fin drive device at the vessel end. The invention also discloses a method for manufacturing the fin stabilizer and the water vessel.