Fluid Fitting Dynamic Tip for Thermal Expansion Compensation
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Solution Overview
Problem
Conventional fluid connections between hoses and nipples are prone to leak paths due to differences in thermal expansion coefficients and lack of residual force, leading to compression leakage, especially in environments where O-rings are damaged by crimping processes.
Innovation Solution
A fluid fitting design featuring a metallic nipple with a socket that is crimped to a flexible hose, incorporating a sealing sleeve and axial protrusion to provide a multi-stage crimping mechanism that retains the hose securely, and a dynamic tip that expands with pressure to maintain a seal across temperature cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional connection methods (O-rings) are used, then ease of manufacture is improved, but reliability deteriorates due to damage during crimping and thermal expansion differences
Solution Approach 1:
The patent removes the O-ring from the connection system entirely, extracting the problematic sealing element that is damaged during crimping. The sealing function is replaced by the crimped socket structure itself, which forms a permanent mechanical seal without requiring separate sealing components.
Solution Approach 2:
The patent introduces a dynamic tip that can expand and contract in response to pressure and thermal changes. This dynamic element compensates for thermal expansion differences between the metallic nipple and non-metallic hose, maintaining seal integrity under varying operating conditions.
2Adaptability or versatility
If a metallic nipple is used with non-metallic hose, then adaptability is improved, but reliability deteriorates due to different coefficients of thermal expansion
Solution Approach 1:
The patent utilizes the different thermal expansion parameters of metallic and non-metallic materials by designing a dynamic tip that actively compensates for these differences. The tip's expansion and contraction characteristics are specifically engineered to counteract the relative movement caused by thermal cycling between dissimilar materials.
Solution Approach 2:
The dynamic tip provides real-time adaptation to thermal expansion differences through its ability to expand and contract. This dynamic response maintains reliable sealing between the metallic nipple and non-metallic hose across varying temperature conditions.
3Reliability
If multi-stage crimping is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent divides the crimping process into multiple stages with distinct functional zones: a first crimping area for initial attachment and a second crimping area for enhanced sealing. This segmentation allows each stage to perform its specific function optimally while maintaining overall system reliability.
Solution Approach 2:
The patent employs nested crimping structures where the second crimping area is positioned within or alongside the first crimping area. This nesting approach allows multiple sealing functions to be integrated into a compact connection structure without proportionally increasing overall 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
The design significantly reduces and eliminates leaks by providing a robust, pressure-resistant seal that withstands high pressures and multiple temperature cycles, ensuring reliable fluid communication.
Implementation Method 1
The socket may be deformed by crimping, which may permanently attach a fluid conduit to a nipple
Implementation Method 2
The dynamic tip may be configured to expand in response to an increase in fluid pressure
Implementation Method 3
The axial protrusion may be configured to protrude into an axial end of a fluid conduit
Data Source
AI summary
A fitting (30) for fluid communication with a fluid conduit includes a first fluid conduit connection portion (42), a second fluid conduit connection portion (42′), a header (60) disposed axially between the first fluid conduit connection portion and the second fluid conduit connection portion, and a socket (70). A fluid fitting may include a nipple (40), a radial projection (48) connected to the nipple, and an axial protrusion (120) extending from the radial projection. The axial protrusion may be configured to protrude into an axial end of a fluid conduit (80). A fluid fitting may include a fluid conduit connection portion (42) and a dynamic tip (130) connected to an end of the fluid conduit connection portion. The dynamic tip may be configured to expand in response to an increase in fluid pressure.