Vertically Rotating Grooming Brush for Ship Hull Biofouling

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Solution Overview

Problem

Existing ship hull grooming systems struggle to effectively attach and remove biofouling without damaging the protective coating, as they lack controlled attachment forces and may cause excessive wear.

Innovation Solution

A vertically rotating grooming attachment brush with a brush hub and arrangement of grooming elements, including bristle tufts or flexible studs, creates a low pressure region that generates an attractive force for attachment to the surface, allowing controlled force application for fouling removal without damaging coatings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If stiff brushes are used to remove hard fouling from the hull, then fouling removal effectiveness is improved, but the protective coating on the hull is damaged

Engineering Contradiction:

Improvefouling removal effectivenessVSAvoidcoating damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The brush system uses different brush types (stiff brushes for fouling removal, soft brushes for coating protection) in different locations and for different functions. The stiff brushes are specifically targeted at fouling areas while soft brushes protect the coating, allowing effective fouling removal without damaging the protective coating.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The grooming system is divided into separate functional components: stiff brushes for removing fouling and soft brushes for protecting the coating. This segmentation allows each brush type to perform its specific function optimally without compromising the other objective.

Inventive Principle:

Principle #1Segmentation

2Productivity

If high attachment force is applied to effectively groom the surface, then fouling removal capability is improved, but excessive wear is caused to the protective coating

Engineering Contradiction:

Improvegrooming effectivenessVSAvoidcoating wear

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

Different brush stiffness levels are applied to different functions: stiff brushes concentrate force on fouling removal while soft brushes provide gentle contact for coating protection. This local differentiation of brush properties allows effective grooming without excessive coating wear.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The soft brush acts as an intermediary between the grooming system and the protective coating, distributing and moderating the attachment force to prevent excessive wear while still enabling effective fouling removal through the coordinated action of stiff and soft brushes.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If softer brushes are used to protect the protective coating, then coating damage is reduced, but fouling removal capability is decreased

Engineering Contradiction:

Improvecoating protectionVSAvoidfouling removal capability

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The brush system is segmented into stiff brushes for fouling removal and soft brushes for coating protection. This segmentation resolves the contradiction by assigning different brush types to different functions, allowing both effective fouling removal and coating protection to be achieved simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different brush stiffness properties are applied locally for different purposes: stiff brushes in contact with fouling areas for effective removal, and soft brushes in contact with the coating for protection. This local quality differentiation enables both objectives to be met without compromise.

Inventive Principle:

Principle #3Local quality

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 system effectively removes unwanted materials like silt, slime, and incipient biofouling from ship hulls and other underwater surfaces without causing damage to the coatings, through controlled attachment and force application.

Implementation Method 1

creates a low pressure region that generates an attractive force for attachment to the surface

Methodology Applied

Scientific EffectLow pressure region: Pressure Gradient

Data Source

PatentUS12201211B2Vertically rotating grooming attachment brush and method of use

Publication Date: 2025.01.21 FLORIDA INST OF TECH

AI summary

A rotating grooming brush comprising a brush hub having grooming elements and shroud elements, and method for grooming a surface having an unwanted material thereon. The elements extend from the brush hub and may be positioned near its outer periphery. The elements may be grooming elements forming an array and shroud elements forming a shroud array. A rigid or elastomeric shroud extending from the brush hub surface may optionally be included about the edge of the brush hub, to the outside of the grooming elements. Rotation of the grooming attachment brush causes a low pressure region to build in the central area of the brush. This low pressure region creates a resulting force that forcefully attracts the grooming attachment brush to the surface to be groomed. The resulting force is controlled by the diameter of the brush hub, arrangement, of the elements and the speed of rotation.