Sealing Washer Protrusion for Shear Stress Resistance
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Solution Overview
Problem
Existing seals with a sealing washer attached to an axial wing face detachment issues during assembly, leading to difficulties in fitting and potential damage, as well as incomplete sealing due to the washer detaching from the carrier ring.
Innovation Solution
The sealing washer protrudes from the axial wing, forming a projecting part that covers the wing's outer circumference and is securely bonded using an adhesive, reducing the risk of detachment and facilitating assembly by acting as a centering aid and counteracting shear stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing washer is attached to the axial wing by material bonding, then detachment risk is reduced, but assembly forces in the axial direction can still cause shearing detachment
Solution Approach 1:
The sealing washer protrudes axially to create a projecting part that extends beyond the axial wing's free end. This axial extension allows the washer to bear against the receiving housing wall, converting axial assembly forces into compressive contact forces rather than shearing forces at the attachment interface.
Solution Approach 2:
The assembly forces that initially pose a shearing risk are converted into beneficial compressive forces. The projecting part of the washer bears against the housing wall, using the assembly force itself to maintain contact and sealing, thereby transforming the harmful shearing effect into a useful compressive contact.
2Ease of operation
If the sealing washer protrudes from the axial wing forming a projecting part, then assembly is facilitated and detachment is prevented, but the structure becomes more complex
Solution Approach 1:
The projecting part of the sealing washer performs multiple functions simultaneously: it acts as a centering aid during assembly by contacting the housing wall first, provides sealing contact to prevent leakage, and prevents detachment by covering the outer face. This multi-functionality eliminates the need for separate components.
Solution Approach 2:
The sealing function and the mechanical retention function are merged into a single sealing washer component. The projecting part integrates the centering, sealing, and anti-detachment functions that would otherwise require separate elements, simplifying the overall structure despite the apparent geometric complexity.
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 ensures a secure and reliable assembly of the seal within the housing bore, maintaining the static sealing effect and preventing washer detachment, while the PTFE composition with fiber reinforcement reduces creep and assembly forces, ensuring a tight and wedged fit.
Implementation Method 1
Assembly by material bonding is achieved by means of a suitable adhesive product which is placed between the carrier ring and the sealing washer
Implementation Method 2
the PTFE composition with fiber reinforcement reduces creep
Implementation Method 3
the forces acting in the axial direction could in particular have for the effect that the sealing washer is detached from the axial wing by shearing
Data Source
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AI summary
The invention relates to a seal (1) comprising: a support ring (2) including an axial flange (3), and a sealing washer (4) which is disposed or arranged on the support ring (2) and which surrounds the axial flange (3) along the external edge thereof. The seal is characterised in that the sealing washer (4) projects beyond the free end (5) of the axial flange (3), thus forming a protruding portion (6).