Beaded Gasket Stiffening Structure for Axial Seal Stability
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Solution Overview
Problem
Existing axial seals, particularly in pumps, face challenges in maintaining a reliable sealing effect due to thermally induced geometric changes and pressure-related movements, which can lead to instability and increased risk of gap extrusion, especially when dealing with varying tolerances and high pressures.
Innovation Solution
A bead seal with a first bead loop and optional additional bead loops, each equipped with a stiffening structure that extends into the inner region, providing enhanced stiffness and maintaining a critical minimum surface pressure, even with significant changes in joint width, thus ensuring a consistent sealing contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If soft material seals are used for axial sealing, then the seal can accommodate some joint width variations, but the sealing reliability deteriorates under high pressure and temperature-induced geometric changes due to gap extrusion risk
Solution Approach 1:
The bead seal utilizes a flexible metallic structure that can deform elastically to accommodate joint width variations while maintaining sealing contact. The bead configuration allows the seal to flex and conform to dimensional changes without losing its sealing capability, resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The bead seal design inherently provides cushioning against pressure-induced movements and thermal expansion by allowing controlled deformation of the bead structure. This prior cushioning capability prevents gap extrusion while maintaining sealing pressure, ensuring reliable sealing under varying operating conditions.
2Ease of manufacture
If soft material seals are used, then installation is simplified, but the risk of gap extrusion increases under pulsations and high pressures
Solution Approach 1:
The flexible metallic bead seal maintains the installation simplicity of soft material seals while eliminating gap extrusion risk through its inherent structural integrity. The bead configuration allows easy installation similar to soft seals but provides resistance against high pressure and pulsations that would cause extrusion of traditional soft materials.
3Adaptability or versatility
If the axial joint width varies due to tolerances and thermal effects, then the seal must accommodate a wide range of dimensions, but maintaining consistent sealing pressure becomes difficult
Solution Approach 1:
The flexible bead seal structure can deform to accommodate varying joint widths while maintaining relatively uniform sealing pressure distribution. The elastic deformation of the bead allows the seal to conform to dimensional variations without creating pressure concentrations that would compromise sealing effectiveness.
4Device complexity
If conventional seals are used without stiffening structures, then the seal design is simpler, but the seal cannot maintain critical minimum surface pressure under significant joint width changes
Solution Approach 1:
The flexible bead seal maintains structural integrity and sealing pressure capability without requiring additional stiffening structures. The bead configuration itself provides the necessary stiffness-flexibility balance, allowing the seal to maintain minimum surface pressure under joint width variations while keeping the design simple.
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 bead seal effectively compensates for variations in joint width, maintaining a reliable sealing effect and preventing gap extrusion, while also acting as a throttle to manage pressure peaks, particularly during cold starts, and providing improved technical cleanliness.
Implementation Method 1
The bead seal (S) effectively compensates for variations in joint width, maintaining a reliable sealing effect
Implementation Method 2
acting as a throttle to manage pressure peaks, particularly during cold starts
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A beaded seal for sealing an axial joint between a first component (1) and a second component (15), the beaded seal (S) comprising: (a) a first beaded loop (21) which surrounds a first inner region (22) in an axial view and has a beaded end face for axial contact with one of the components (1, 15), (b) a passage (23) for fluid located in the first inner region (22), (c) wherein the first beaded loop (21) is a smallest beaded loop surrounding the passage (23), and (d) a first stiffening structure (24) which extends in an axial view from the first beaded loop (21) into the first inner region (22) to stiffen the first beaded loop (21).