Elastomeric Seal Bead Structure for Reliable Groove Seating
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Solution Overview
Problem
Existing seals, such as O-rings, often fail to properly fit into irregular grooves during assembly, leading to leaks and equipment failure due to improper installation, which is difficult to detect visually.
Innovation Solution
An improved elastomeric seal with a pre-formed elastomeric bead that fits into a groove and flat surfaces, ensuring proper alignment and including metal inserts in fastener holes to maintain integrity, allowing for visual confirmation of correct installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an O-ring is used to seal between two components, then the seal can be flexible and accommodate irregular groove paths, but the O-ring may shift out of the groove during assembly leading to leakage
Solution Approach 1:
The seal is pre-formed with a bead structure that automatically guides it into the groove during assembly. The bead's geometry is designed beforehand to engage with the groove walls, preventing shift before the seal is fully installed and compressed.
Solution Approach 2:
The bead portion of the seal is made visible during assembly, allowing operators to visually confirm proper positioning. This visibility acts as a signaling mechanism to ensure the seal is correctly seated in the groove before final tightening.
2Ease of operation
If the O-ring circumference is made slightly smaller than the groove length to fit, then the O-ring can be installed, but it must be stretched which complicates installation and may cause improper seating
Solution Approach 1:
The seal design changes the dimensional parameters by making the bead cross-section smaller than the groove cross-section. This allows the bead to be compressed into the groove without excessive stretching, while the bead height provides sufficient sealing contact when compressed.
3Ease of manufacture
If a flat gasket with holes is used for sealing, then fasteners can pass through to secure components, but the gasket requires precise alignment and may not seal as effectively in irregular grooves
Solution Approach 1:
The seal is segmented into distinct functional zones: a bead portion for sealing in the groove and flat portions for bearing against the component surfaces. This segmentation allows each zone to perform its specific function optimally while maintaining overall seal integrity.
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 improved seal ensures secure and reliable sealing by eliminating improper fitting and leakage, enhancing installation reliability and reducing equipment failure risks.
Implementation Method 1
The cross-sectional diameter of the O-ring is typically smaller than width of the groove and larger than the depth of the groove so that the O-ring is compressed and flattened to some degree when the two components are tightened together
Implementation Method 2
The O-ring itself is flexible and, when relaxed, its centerline forms a circle
Data Source
AI summary
Described is seal that can replace an O-ring seal in an existing machine. The seal could also be used in place of an O-ring in a new machine. The seal includes a top and bottom surface and a bead that extends from the top surface for seating into the O-ring-seating groove.