Elastomeric Groove Seal Structure for O-Ring Alignment
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Solution Overview
Problem
Existing seals between mechanical components with grooves, such as O-rings, often fail to maintain proper alignment during assembly, leading to leakage and contamination due to their flexible nature and lack of preformation to fit irregular paths, making it difficult to ensure a secure and effective seal.
Innovation Solution
An improved elastomeric seal with a flat surface and an elastomeric bead that mates with the groove, eliminating the need for stretching and ensuring proper alignment, combined with metal fastener hole inserts to maintain seal integrity, is designed to fit seamlessly into the groove without deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an O-ring is used to seal between two mechanical components, then the seal can be flexible and adaptable to 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 specific cross-sectional shape that includes a rounded portion designed to fit into the groove. This preliminary shaping ensures that the seal automatically positions itself correctly in the groove during assembly, eliminating the shifting problem while maintaining adaptability to irregular paths
Solution Approach 2:
The seal has different structural characteristics in different regions: a rounded portion for engaging the groove and flat portions for sealing against the component surfaces. This local differentiation allows the seal to simultaneously achieve adaptability to the groove path and reliability in maintaining its position
2Length of moving object
If the O-ring circumference is made slightly smaller than the groove length to allow stretching, then the O-ring can fit the entire length of the groove, but it becomes difficult to keep the stretched O-ring in the groove during assembly
Solution Approach 1:
The seal is pre-formed to the exact length and shape required for the groove, eliminating the need for stretching during assembly. The predetermined cross-sectional configuration with a rounded portion ensures proper fit and positioning without requiring the installer to stretch or deform the seal
Solution Approach 2:
Instead of making the seal smaller and stretching it to fit, the invention inverts the approach by making the seal slightly larger with a rounded portion that compresses into the groove during assembly, achieving fit through compression rather than tension
3Device complexity
If the O-ring is not visible when components are joined, then the assembly process is simpler, but the shift or improper installation is not apparent leading to leakage
Solution Approach 1:
The seal includes a visual indicator feature that changes appearance or becomes visible when the seal is properly installed. This allows operators to quickly verify correct installation without complex inspection procedures, maintaining assembly simplicity while enabling easy detection of proper fit
4Ease of manufacture
If a flat gasket with holes is used instead of an O-ring, then fasteners can pass through to secure components, but the gasket requires forcing flat surfaces together and may not provide as effective a seal
Solution Approach 1:
The invention merges the advantages of both O-rings and flat gaskets into a single hybrid seal structure. The seal combines the flexible sealing capability of an O-ring with the fastener passage feature of a flat gasket, providing both effective sealing and easy fastener installation through its integrated design
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 solution provides a secure, reliable seal by eliminating the risk of improper installation and leakage, ensuring effective sealing between mechanical components and enhancing maintenance procedures by allowing visual confirmation of correct placement.
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 by the force of the fasteners
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.