Deep-Water Optical Dome Enclosure for Implosion Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical enclosures for deep water environments fail to withstand the extreme pressures and stresses associated with deep ocean exploration, leading to potential implosion and catastrophic failure due to material mismatches, differential displacements, and temperature variations.
Innovation Solution
The use of a transparent pressure-bearing optical dome with an angular measurement of approximately 174 degrees, coupled with a compliance layer and a dome support ring that matches the radial stiffness of the dome, along with textured surfaces to lock the compliance material, minimizes tensile stresses and compensates for differential movements under high pressure and temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid housing structure is used to withstand deep water pressure, then structural strength is improved, but stress concentration at joints and material boundaries increases leading to potential failure
Solution Approach 1:
The patent employs a domed port design with a specific radius of curvature that is optimized to distribute hydrostatic pressure uniformly across the structure. The curved geometry eliminates stress concentration points that would occur with flat or sharp-edged designs, allowing the enclosure to withstand deep water pressures while maintaining structural integrity at joints and material boundaries.
Solution Approach 2:
The patent utilizes materials with matched coefficients of thermal expansion and pressure-induced dimensional changes. By selecting materials whose physical parameters change in concert under environmental stress, the design prevents differential movement and stress concentration at material interfaces, thereby maintaining reliability while achieving the required structural strength.
2Reliability
If different materials are joined to create a composite enclosure, then durability and pressure resistance are improved, but differential displacement and stress at material boundaries increase
Solution Approach 1:
The patent selects materials whose physical parameters—specifically coefficients of thermal expansion and pressure-induced dimensional changes—are closely matched. This parameter matching ensures that when the enclosure is subjected to environmental stress, all materials expand or contract at similar rates, preventing differential displacement and stress concentration at material boundaries.
Solution Approach 2:
The patent employs a composite structure consisting of a rigid housing material combined with a compliant sealing material. The rigid material provides the necessary structural strength for pressure resistance, while the compliant material accommodates any minor dimensional differences and maintains sealing integrity. This composite approach allows the enclosure to achieve both pressure resistance and material boundary stability.
3Strength
If a dome port is used to distribute pressure evenly, then structural integrity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a domed port design with a radius of curvature that is deliberately chosen to be relatively large compared to the port dimensions. This geometric parameter selection reduces the complexity of manufacturing while maintaining the pressure-distributing benefits of the curved geometry. The specific radius value is optimized to achieve structural integrity without requiring excessive manufacturing precision.
4Stress or pressure
If the enclosure is designed for deep water use, then pressure withstand capability is improved, but susceptibility to implosion from pressure cycling increases
Solution Approach 1:
The patent employs a domed port design that inherently distributes hydrostatic pressure uniformly across the structure. This curved geometry prevents the formation of stress concentration points that would be particularly vulnerable during pressure cycling. The dome shape allows the enclosure to flex slightly under pressure changes without creating localized stress peaks that could lead to implosion.
Solution Approach 2:
The patent combines rigid structural materials with compliant sealing materials in a composite construction. The rigid material provides the necessary strength to withstand deep water pressures, while the compliant material acts as a buffer during pressure cycling, absorbing differential movements and preventing the initiation of implosion. This composite structure maintains reliability through repeated pressure transitions.
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 solution enhances the durability and structural integrity of optical enclosures, preventing fractures and implosion by allowing matched displacements and rotations of the dome and support ring, thereby ensuring reliable operation in deep water conditions.
Implementation Method 1
an intermediate stepped dome support ring or spacer may be positioned between the housing and dome... The intermediate dome support ring may have opposite annular faces that are substantially planar and parallel, with sections of different radial thickness such that a section closest to the dome window is structured to closely match the radial stiffness of the dome window
Implementation Method 2
Surfaces of the annular faces on the dome support ring may be textured with features to lock a compliance material layer positioned between the dome support ring and dome
Implementation Method 3
a section closest to the dome window is structured to closely match the radial stiffness of the dome window, and a section closest to the housing is tuned to allow matched displacements of the dome support ring to that of the dome window
Implementation Method 4
Hydrostatic pressure is greatly increased in deep water environments relative to shallow or surface level environments. For example, sea surface air and water pressures are around 1 atmosphere or 15 PSI. However, the pressure increases by about 1 atmosphere/15 PSI for every 10 meters of depth below the surface.
Data Source
AI summary
Enclosures for deep ocean or other high exterior pressure environment including a dome window with an angular measurement of between 164 and 178 degrees, a structure housing, a dome support ring, and a compliance material positioned between the dome support ring and housing are disclosed.