Dual-Thickness Fluid Coupling Gasket for Bidirectional Sealing
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Solution Overview
Problem
The existing gaskets for fluid couplings face challenges in maintaining long-term sealing performance, particularly with synthetic resin materials, and require improved sealing performance, especially when exposed to corrosive substances like ammonium hydrogen fluoride.
Innovation Solution
A gasket design featuring both a thick and a thin portion, each providing a face seal, which can be positioned radially outside or inside depending on fluid pressure conditions, allowing for optimal sealing performance and made from materials like stainless steel or fluorine-based synthetic resin, with anti-drop protrusions for secure fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-thickness gasket is used, then the structure is simple and easy to manufacture, but the sealing performance cannot be optimized for both pressurization and depressurization conditions simultaneously
Solution Approach 1:
The gasket is designed with different thicknesses in different radial regions: a first thickness in the radially outside portion and a second thickness in the radially inside portion. This local quality variation allows the gasket to provide optimized sealing for both pressurization (using the radially outside portion) and depressurization (using the radially inside portion) conditions simultaneously, resolving the contradiction between sealing performance and structural simplicity.
2Object-affected harmful factors
If synthetic resin material is used for the gasket, then the gasket is resistant to corrosive substances, but the long-term sealing performance deteriorates compared to metal materials
Solution Approach 1:
The gasket employs a composite structure combining synthetic resin material with enhanced geometric design (varying thickness regions). The synthetic resin provides corrosion resistance to corrosive substances like ammonium hydrogen fluoride, while the dual-thickness design ensures reliable sealing performance under both pressurization and depressurization conditions, thus achieving both corrosion resistance and long-term sealing reliability.
3Reliability
If the gasket is designed for pressurization only, then the radially outside portion is optimized, but the sealing performance during depressurization is insufficient
Solution Approach 1:
The gasket is designed with multi-functionality to handle both pressurization and depressurization conditions. The radially outside portion with first thickness optimizes sealing during pressurization, while the radially inside portion with second thickness ensures effective sealing during depressurization. This universal design allows a single gasket to perform reliably under varying pressure conditions, resolving the contradiction between pressurization optimization and depressurization adaptability.
Data Source
AI summary
A gasket includes a thick portion providing a first face seal and a thin portion providing a second face seal. A fluid coupling has an annular gasket housing recess that includes a wide portion for housing the thick portion of the gasket and a narrow portion for housing the thin portion of the gasket.