Air-Driven Rotor Propulsion Mechanism for Maritime Vessels
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Solution Overview
Problem
Existing propulsion mechanisms for maritime vessels, particularly those using radial vane rotors, face inefficiencies and emission challenges, as they struggle to comply with stringent coastal emission regulations when operating on heavy or light gas oil, necessitating the development of a more efficient and flexible propulsive solution.
Innovation Solution
The propulsion mechanism employs a rotor with radial vanes and a screen to evacuate water from the spaces between the vanes using air flow, allowing for improved water engagement and propulsion efficiency, with features like axial and peripheral air inlets and outlets, and a disc-shaped rotor carrier for orientation control, enabling efficient operation without significant weight or complexity increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional propellers driven by fuel oil power plants are used, then propulsive power is achieved, but emission levels exceed permissible regulations in coastal regions
Solution Approach 1:
The patent replaces the traditional fuel oil power plant and propeller system with an air compressor-driven system that uses compressed air to rotate the rotor. This substitution eliminates combustion emissions entirely while maintaining propulsive capability through direct air-water interaction, resolving the contradiction between power generation and emission compliance.
Solution Approach 2:
The invention employs pneumatic principles by using compressed air stored in a tank to drive the rotor through pneumatic motors or direct air expansion. This pneumatic propulsion system replaces thermal combustion with gas pressure-driven mechanical motion, achieving zero-emission operation while delivering sufficient propulsive power for maritime vessels.
2Productivity
If radial vane rotors are used for propulsion, then propulsive force is generated, but water remains in the spaces between vanes reducing efficiency
Solution Approach 1:
The patent incorporates preliminary action by providing air inlet passages that deliver compressed air to the rotor spaces before the rotor completes its rotation. This pre-supplied air evacuates water from the vanes' spaces in advance, ensuring the spaces are ready to engage water effectively on the next rotation cycle, thereby maximizing propulsion efficiency.
Solution Approach 2:
The system employs periodic action through the cyclic delivery of compressed air to the rotor spaces at specific intervals during rotation. The air is supplied periodically to evacuate water at optimal moments in the rotation cycle, creating a rhythmic pattern of water removal that synchronizes with the rotor's motion to maintain continuous efficiency.
3Productivity
If air is used to evacuate water from rotor spaces, then propulsion efficiency improves, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the air inlet passages to serve multiple functions: they deliver compressed air to evacuate water from rotor spaces, provide structural support for the rotor assembly, and facilitate easy maintenance access. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity.
Solution Approach 2:
The invention merges the air delivery system with the rotor housing structure, integrating the air inlet passages directly into the existing mechanical components rather than adding separate external systems. This consolidation combines the pneumatic function with structural elements already present in the propulsion mechanism, minimizing additional complexity.
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 solution enhances propulsion efficiency by ensuring effective water engagement and reduces emissions by allowing the use of air-assisted water evacuation, making it suitable for stringent emission regions and providing a cost-effective, reliable alternative to traditional propulsive systems.
Implementation Method 1
a screen configured to shroud a portion of the rotor... means configured for freeing the spaces in-between the vanes of water while the spaces face the interior of the vessel
Data Source
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AI summary
A propulsion mechanism (100) for a maritime vessel (200) including a rotor (75) mounted for rotation about a rotor axis. The rotor (75) includes a plurality of vanes (20) extending essentially radial to the rotor axis and the vanes are arranged to define spaces (25) in between the vanes (20). The propulsion mechanism (100) further includes means configured for freeing the spaces (25) of water by means of application of air.