Mechanically Retained Valve Seat Sealing Disk
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Solution Overview
Problem
Existing fluid control devices face issues with sealing disk failure due to de-bonding under high pressure drops and low flow conditions, particularly when using more robust materials that lack sufficient bonding strength.
Innovation Solution
A mechanical retention sealing disk mounting assembly that uses axial or radial compression to securely hold the sealing disk in place, eliminating the need for adhesives and enhancing the sealing performance by increasing friction between the disk and the mounting components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If more robust materials are used to form the sealing disk for high pressure drops and low flow conditions, then the sealing durability is improved, but the bonding strength between the sealing disk and disk holder deteriorates
Solution Approach 1:
The patent replaces the chemical bonding system (adhesive) with a mechanical retention system. The sealing disk is retained through axial compression applied by a retainer component, which creates friction between the disk and mounting components. This mechanical retention method eliminates the bonding weakness of robust materials while maintaining sealing durability under high pressure drops and low flow conditions.
Solution Approach 2:
The patent changes the retention mechanism from chemical (adhesive bonding) to physical (mechanical compression). By applying axial compression force through the retainer, the system alters the retention parameter from bond strength to friction force, allowing robust sealing materials to be used without bonding failures.
2Ease of manufacture
If adhesive bonding is used to attach the sealing disk to the disk holder, then the ease of manufacture is improved, but the reliability under high pressure drops deteriorates
Solution Approach 1:
The patent replaces the adhesive bonding system with a mechanical compression system. The retainer applies axial compression to the sealing disk, creating friction-based retention that is more reliable under high pressure drops. While the assembly process becomes slightly more complex, it eliminates bonding failures and improves overall reliability in severe service conditions.
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 mechanical retention method stabilizes the sealing disk, preventing dislodgment and failure during high pressure drop, low flow operations, and allows the use of robust materials with poor bonding qualities, ensuring reliable sealing in severe service conditions.
Implementation Method 1
enhancing the sealing performance by increasing friction between the disk and the mounting components
Data Source
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AI summary
A sealing disk mounting assembly for a regulator includes a mounting member adapted to be operatively attached to a tubular member of a control member assembly of a regulator, a disk holder operatively attached to the mounting member, and an annular sealing disk disposed in an annular channel that is formed between the mounting member and the disk holder. The annular sealing disk is mechanically retained between the mounting member and the disk holder by compressive forces.