Modular Watercraft Driveline Layout for Hydrodynamic Efficiency
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Solution Overview
Problem
Existing electric watercraft designs face issues with modularity, efficiency, and maneuverability due to integrated propulsion systems that cause hydrodynamic inefficiencies and reduced maneuverability.
Innovation Solution
A modular design comprising a hull module, electronics box, and driveline module, where the driveline module is partially submerged and separated from the motor by a gap, allowing water to flow parallel to the propelling member for efficient cooling and improved hydrodynamics, with detachable components for easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the propulsion system is integrated into the hull, then the watercraft structure is simplified, but hydrodynamic efficiency decreases and maneuverability is reduced
Solution Approach 1:
The propulsion system is segmented from the hull structure and placed in a separate driveline module that extends below the hull. This segmentation allows the propulsion components to be positioned optimally for hydrodynamic efficiency while keeping the hull structure simple and clean.
Solution Approach 2:
The driveline module is positioned in a third dimension extending below the hull surface, rather than integrating propulsion components within the hull volume. This vertical dimensionality change enables better hydrodynamic flow around the propulsion system while maintaining simple hull architecture.
2Device complexity
If the motor and propelling member are positioned close together, then the driveline structure is compact, but water cannot flow parallel to the propelling member reducing efficiency
Solution Approach 1:
The driveline module is designed to be dynamic in its positioning, extending below the hull to create optimal water flow paths. The gap between motor and propelling member is specifically designed to allow water to flow parallel to the propelling member, enhancing propulsion efficiency while maintaining structural compactness.
3Shape
If components are integrated into the hull, then the watercraft is more streamlined, but maintenance and service become difficult
Solution Approach 1:
The driveline module is segmented as a separate removable unit that extends below the hull. This segmentation maintains the streamlined appearance of the hull while allowing the driveline module to be easily detached for maintenance, service, or replacement without affecting the hull structure.
Solution Approach 2:
The driveline module is extracted from the hull as a separate serviceable unit. This extraction allows maintenance personnel to access and service the motor and propelling member components easily by removing the entire driveline module, while the hull remains streamlined and intact.
4Loss of energy
If the driveline module is completely submerged, then hydrodynamic efficiency is maximized, but cooling of electronic components becomes difficult
Solution Approach 1:
The system is segmented into two distinct modules: the driveline module (motor and propelling member) that is submerged for hydrodynamic efficiency, and the electronics box that remains above water for effective cooling. This segmentation resolves the thermal management challenge while maximizing propulsion efficiency.
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 modular design enhances efficiency and maneuverability by minimizing hydrodynamic losses and enabling easy component replacement, while maintaining high performance and hydrodynamic advantages.
Implementation Method 1
separated from the motor by a gap, allowing water to flow parallel to the propelling member for efficient cooling and improved hydrodynamics
Implementation Method 2
The driveline module is adapted to be mounted at an underside of a hull module of the watercraft. Substantially the entire driveline module is surrounded by water to provide the driveline module with passive cooling
Data Source
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AI summary
In one aspect of the invention, there is provided a modular electrically motorized watercraft (10), the watercraft comprising a hull module (20) and a driveline system (60). The driveiine system (60) comprises an electric power module (50) and a driveline module (30). The driveline module (30) is configured to be arranged at an underside of the hull module (20).