Distributed Hull Thrusters for Low-Speed Vessel Steering
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Solution Overview
Problem
Existing marine vessel thruster systems face challenges in maneuverability at low speeds due to the size and central mounting of thruster motor housings, which hinder space for other accessories and require significant power, leading to increased costs and complexity in maintenance and repair.
Innovation Solution
A modular thruster system with independently controlled motor/propeller units mounted at various hull locations, featuring a compact design and electrical control system for precise thrust direction, allowing for smaller motors and easier replacement, and integration with existing features like swim decks to reduce clutter and enhance maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a central-mounted thruster motor housing is used, then maneuverability control is achieved, but the size of the housing increases and interferes with other accessories
Solution Approach 1:
The patent divides the thruster system into separate modular components: the thruster motor unit and the propeller unit can be independently mounted and replaced. This segmentation allows the system to achieve maneuverability control without requiring a large centralized housing, as each component can be optimally sized for its specific function.
Solution Approach 2:
The patent transitions from a single centralized thruster mounting to multiple mounting locations distributed across the vessel hull. This spatial distribution in multiple dimensions allows for effective maneuverability control while keeping individual thruster units compact and non-interfering with other accessories.
2Force
If a large thruster motor is used, then sufficient thrust is produced, but power consumption increases and maintenance complexity increases
Solution Approach 1:
The system uses multiple smaller thruster motor units distributed at different hull locations rather than one large centralized motor. Each unit produces moderate thrust, but their combined effect achieves the required total thrust while consuming less power individually and allowing selective operation of only needed units.
Solution Approach 2:
Different thruster units are positioned at specific locations on the hull where they can efficiently produce thrust in desired directions. This localized thrust production optimizes the effectiveness of each motor unit, reducing overall power requirements compared to a single large motor operating at full capacity.
3Ease of operation
If a centralized thruster system is used, then maneuverability is improved, but maintenance and repair become more complex and expensive
Solution Approach 1:
The thruster system is divided into independent modular units (motor units and propeller units) that can be separately accessed, removed, and replaced. This modular architecture dramatically simplifies maintenance compared to a centralized system, as defective components can be serviced independently without affecting other thruster units or requiring complex disassembly procedures.
Solution Approach 2:
The patent designs the system so that propeller units and motor units can be extracted and replaced as separate interchangeable components. This extraction capability allows for easy replacement of worn or damaged parts, reducing maintenance time and costs while preserving the maneuverability benefits of the multi-unit configuration.
4Measurement precision
If multiple thruster units are mounted at various hull locations, then maneuverability precision is improved, but device complexity increases
Solution Approach 1:
While the system does use multiple distributed thruster units for precise maneuverability control, the segmentation into standardized modular components actually reduces overall system complexity. Each unit follows the same design template, allowing for simplified manufacturing, installation, and maintenance compared to a single complex centralized system.
Solution Approach 2:
The modular thruster units are designed with universal mounting interfaces and standardized components that can be applied across different vessel types and configurations. This universality reduces the complexity of integrating multiple units, as the same basic design can be replicated at various hull locations without requiring custom engineering for each position.
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 thruster system provides enhanced maneuverability and control at low speeds, reduces the need for large motors, and simplifies maintenance by allowing individual unit replacement, while minimizing interference with the main propulsion system.
Implementation Method 1
a first motor/propeller unit and a second motor/propeller unit of a thruster system mounted to a hull of a marine vessel
Implementation Method 2
thrust produced by the main engine and propeller, in combination with the steering feature of the rudder and/or propeller
Data Source
AI summary
A thruster system for improved steering and maneuverability of a marine vessel when operating at relatively low, or wakeless speeds, such as in the vicinity of docks, swimmers or other obstacles, or when trailering, beaching or mooring. The thruster system has a modularized design adapted to independently control separate motor/propeller units located at various positions on the vessel's hull. Each propeller of the modular thruster motor system has its own relatively small, electric motor and mounting bracket, permitting each motor to be separately mounted to a location on the hull of the marine vessel apart from other thruster motors. The thruster system is further enhanced by an electrical control system for controlling each modular thruster motor system of the thruster system. In some embodiments, a charging system is provided that permits each electrical control system to be separately charged from the marine vessel's main battery.