Composite Seal Ring with Embedded Metal Spring
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Solution Overview
Problem
Conventional resin seal rings in butterfly valve devices face issues with insufficient rigidity at high temperatures, leading to potential dropping out from the valve groove under internal pressure and reduced sealing performance due to high-temperature creep.
Innovation Solution
A composite seal ring is developed by combining a resin seal ring with a metal spring, where the metal spring is disposed within the radial width of the resin seal ring to provide radial outward and inward pressure, securing rigidity and tension, thereby preventing dropping out and maintaining sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resin seal ring is used to simplify the valve structure and eliminate surface treatment, then ease of manufacture is improved, but rigidity at high temperature deteriorates
Solution Approach 1:
The patent combines resin and metal spring materials to create a composite seal ring structure. The resin portion provides sealing functionality while the embedded metal spring provides rigidity and resistance to high temperature deformation, resolving the contradiction between ease of manufacture and rigidity at high temperature.
2Device complexity
If a resin seal ring is used to eliminate surface treatment, then device complexity is reduced, but stability under internal pressure deteriorates
Solution Approach 1:
The composite structure embeds a metal spring within the resin seal ring, creating a hybrid material system that maintains structural stability under internal pressure while keeping the overall device design simple and eliminating the need for complex surface treatments.
Solution Approach 2:
The metal spring is strategically embedded in specific regions of the resin seal ring where structural support is most needed, providing localized reinforcement that enhances overall stability under pressure without adding unnecessary complexity throughout the entire device.
3Ease of operation
If a resin seal ring is used to simplify the valve structure, then ease of operation is improved, but reliability at high temperature deteriorates
Solution Approach 1:
The resin-metal spring composite structure maintains the operational simplicity of resin seals while incorporating metal elements that provide high-temperature stability and prevent creep, thereby ensuring reliable performance in elevated temperature environments without compromising ease of operation.
Solution Approach 2:
The patent modifies the physical and mechanical parameters of the seal ring by incorporating metal spring material, which changes the thermal and mechanical properties to maintain reliability at high temperatures while preserving the operational characteristics of resin seals.
4Ease of manufacture
If a resin seal ring is used to eliminate surface treatment, then manufacturing cost is reduced, but resistance to high temperature creep deteriorates
Solution Approach 1:
The patent creates a composite seal ring by embedding a metal spring within the resin material, combining the manufacturing simplicity and cost-effectiveness of resin with the high-temperature creep resistance of metal, thereby achieving both economical production and superior thermal stability.
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 composite seal ring effectively prevents dropping out from the valve groove and maintains sealing tension at high temperatures, addressing the rigidity and creep-related issues of resin seal rings.
Implementation Method 1
a metal spring is configured to press the seal ring radially outwardly and radially inwardly due to pressure acting on the seal ring or a deformation of the seal ring
Implementation Method 2
the high temperature creep of the resin lowers the tension of the seal ring
Data Source
AI summary
A composite seal ring has a resin seal ring and a metal spring. The resin seal ring is attached in an outer peripheral groove of a valve that opens and closes a passage by a rotational displacement, and the resin seal ring seals between an inner wall of a passage portion that forms the passage and the valve, in the fully closed state of the valve. A metal spring is circularly disposed within a radial width of the resin seal ring. The spring is configured to press the resin seal ring radially outwardly and radially inwardly due to the pressure acting on the resin seal ring or a deformation of the resin seal ring.