Static Dissipative Fluid Coupler with Braided Reinforcement
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Solution Overview
Problem
Existing dielectric hydraulic isolator fittings in fluid conveyance systems face challenges with complex pressure, stress, and strain analysis due to non-conductive helical fiber reinforcement, and are prone to premature failure from moisture and fluid exposure.
Innovation Solution
A rigid coupler design featuring a non-conductive liner surrounded by a tri-axial braided fiber reinforcing structure and a hoop wound composite overwrap, with a dielectric inner and conductive outer sleeve, providing enhanced strength, durability, and simplified stress analysis, while maintaining effective static charge dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-conductive helical fiber wound reinforcement is used, then static charge dissipation is provided, but pressure, stress and strain analysis becomes complex and difficult to predict
Solution Approach 1:
The patent uses a composite reinforcement structure combining non-conductive fibers (for static dissipation) with conductive elements (for simplified stress analysis). The conductive fibers or wires are integrated within the composite layup, creating a multi-functional material that simultaneously provides electrical properties and mechanical predictability.
Solution Approach 2:
The patent introduces conductive elements at specific locations within the composite structure (such as embedded conductive fibers or surface conductive layers) to provide localized electrical conductivity while maintaining the overall non-conductive reinforcement function. This localized approach allows stress analysis simplification without compromising static charge dissipation throughout the entire structure.
2Reliability
If non-conductive helical fiber reinforcement is used, then dielectric isolation is achieved, but premature failure occurs due to moisture and fuel exposure
Solution Approach 1:
The patent employs composite materials that combine the dielectric properties of non-conductive fibers with the environmental resistance of specialized matrices or protective layers. The composite structure creates a barrier system that protects against moisture and fuel penetration while maintaining dielectric isolation functionality.
Solution Approach 2:
The patent uses protective coatings or encapsulation layers that create an inert environment around the non-conductive fibers, preventing direct contact with moisture and fuel. This protective barrier extends the service life by isolating the reinforcement from degrading environmental factors while preserving the dielectric isolation function.
3Reliability
If traditional dielectric fittings are used, then static charge limitation is achieved, but structural strength and durability are reduced
Solution Approach 1:
The patent uses composite materials that integrate both dielectric and structural functions into a single reinforcement system. The composite structure provides the necessary mechanical strength through optimized fiber architecture while simultaneously maintaining the dielectric properties needed for static charge limitation.
Solution Approach 2:
The patent creates a multi-functional reinforcement that simultaneously provides structural support, static charge dissipation, and dielectric isolation. By combining multiple functions into a single reinforcement system, the patent eliminates the need for separate components, thereby enhancing overall structural strength while maintaining electrical safety functions.
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 design enhances the strength and durability of fluid couplers, simplifies the analysis of stress and strain, and provides improved sealing and static charge dissipation, reducing the risk of premature failure.
Implementation Method 1
The reinforcing structure includes an interior cavity defined therein, a multi-axial braided fiber material, and a first matrix material
Implementation Method 2
forming a composite overwrap about at least a portion of the reinforcing structure between the first and second outer end fittings. The composite overwrap includes hoop wound fiber material and a second matrix material
Implementation Method 3
The sleeve comprising a dielectric inner layer defining an inner surface of the interior cavity
Implementation Method 4
a conductive layer defining an outer surface of the sleeve
Implementation Method 5
coupling a reinforcing structure to a portion of a non-conductive liner such that the reinforcing structure circumscribes the non-conductive liner
Data Source
AI summary
A rigid coupler for use in electrically isolating an electrically conductive fluid conveyance system is described. The rigid coupler includes a nonconductive liner having a first end configured to couple to a first adjoining section of the fluid conveyance system, and a second end, opposite said first end, configured to couple to a second adjoining section of the fluid conveyance system. A reinforcing structure circumscribes the nonconductive liner and is coupled to a portion of the nonconductive liner extending between the first and second ends of the nonconductive liner. The reinforcing structure includes a multi-axial braided fiber material impregnated with a matrix material. A fiber overwrap is hoop wound about at a least a portion of the reinforcing structure between the first and second ends of the nonconductive liner.