Loop-Shaped Gasket Structure for Corrosion-Resistant Sealing
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Solution Overview
Problem
Corrosion on the contact surface between a housing and a gasket can lead to the formation of minute gaps, reducing the sealing ability and allowing liquid to infiltrate into the housing.
Innovation Solution
A gasket design featuring loop-shaped portions with gaps that direct liquid infiltration in a circumferential direction, reducing radial infiltration and incorporating a connector portion that is thinner or as thick as the loop-shaped portions, along with an elastic layer for enhanced sealing, and a hydrophilic film to delay liquid infiltration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional gasket without loop-shaped portions and gaps is used, then the structure is simple and manufacturing is easy, but liquid can infiltrate radially into the housing through corrosion gaps, reducing sealing ability
Solution Approach 1:
The gasket is divided into multiple loop-shaped portions (first, second, and third) arranged radially, with gaps between them. This segmentation creates multiple barriers to liquid infiltration, forcing liquid to travel along circumferential paths rather than directly radially into the housing, thereby improving sealing reliability
Solution Approach 2:
The invention introduces a circumferential dimension to liquid flow path by creating gaps between radially arranged loop-shaped portions. Liquid that would normally infiltrate radially is redirected to flow circumferentially along the gaps, adding a dimensional detour that delays infiltration into the housing
2Reliability
If loop-shaped portions with gaps are introduced to redirect liquid flow, then sealing ability is improved by reducing radial infiltration, but the gasket structure becomes more complex
Solution Approach 1:
The connector portion is designed with locally different thickness (thinner) compared to the loop-shaped portions. This local variation creates a recess that serves as a liquid accumulation zone, strategically placing the structural difference where it most effectively delays liquid infiltration while minimizing overall manufacturing complexity
3Reliability
If the connector portion is made thinner than the loop-shaped portions, then liquid accumulation space is created to delay infiltration, but manufacturing precision requirements increase
Solution Approach 1:
The connector portion thickness is changed to be thinner than the loop-shaped portions, creating a controlled parameter variation. This thickness difference generates a recess that functions as a liquid trap, delaying infiltration. The parameter change is localized and quantifiable, making it manageable within standard manufacturing tolerances
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 gasket design effectively prolongs the sealing ability by reducing liquid infiltration into the housing, maintaining sealing over a long period despite corrosion, and offers cost-effective manufacturing options.
Implementation Method 1
a hydrophilic film to delay liquid infiltration
Data Source
AI summary
A gasket, to be installed between a first housing and a second housing, includes a first loop-shaped portion in a loop shape, a second loop-shaped portion in a loop shape that is positioned at a radially inner side of the first loop-shaped portion, with a first gap between the first loop-shaped portion and the second loop-shaped portion, and a first connector portion connecting the first loop-shaped portion and the second loop-shaped portion in a part of the first gap.