Sealing Lip Wing Pressure Surface for Tolerance Compensation
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Solution Overview
Problem
Existing annular seals require medium pressure at the end face of the sealing lip for activation, which can be inconsistent and may not effectively compensate for manufacturing tolerances, leading to suboptimal sealing performance.
Innovation Solution
The design incorporates a first and second sealing lip with a gap between them in the relaxed position, allowing for easy assembly with minimal initial force, and a sealing-lip wing that increases in thickness towards the end, forming a pressure surface in the working position to enhance sealing efficacy under internal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seal is designed with continuously increasing thickness from the lip base region towards the freely protruding end, then the sealing effect is improved, but the seal can only be activated by medium pressure at the end face which limits its applicability
Solution Approach 1:
The sealing lip is segmented into multiple regions with different thickness characteristics: a base region with smaller thickness and an end region with larger thickness. This segmentation allows the seal to be activated by medium pressure acting on the larger surface area of the end region, improving versatility while maintaining the sealing effect provided by the thickness gradient.
Solution Approach 2:
The invention changes the thickness parameter distribution along the sealing lip, creating a gradient from the lip base region to the end region. This parameter change enables the seal to respond to medium pressure more effectively while maintaining reliable sealing performance throughout the contact area.
2Reliability
If the sealing lips are connected in the lip base region and protrude freely at the end, then the seal provides good sealing contact, but assembly requires significant force to overcome the intrinsic preload
Solution Approach 1:
The sealing lip is divided into a base region where lips are connected and an end region where they protrude freely. This segmentation allows the assembly force to be applied at the end region with larger surface area, reducing the required force while still achieving proper sealing contact at the base region.
Solution Approach 2:
The invention introduces a thickness dimension variation along the sealing lip, creating a gradient from base to end region. This dimensional change allows the seal to be activated more easily during assembly while maintaining the necessary contact pressure for reliable sealing.
3Manufacturing precision
If the contact surfaces are spaced apart in the relaxed base position, then manufacturing tolerances can be compensated, but the sealing effect under pressure is reduced
Solution Approach 1:
The invention implements a thickness parameter gradient along the sealing lip, with the end region having larger thickness than the base region. This parameter change allows the spaced-apart configuration to be maintained in the relaxed state for tolerance compensation, while the larger end region thickness provides sufficient material to maintain sealing effect when activated by medium pressure.
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
This design achieves a high sealing effect with increased biasing force and improved tolerance compensation, allowing for easier assembly and maintaining effectiveness despite manufacturing variations, while protecting the sealing surfaces from dirt and adapting to pipe segments.
Implementation Method 1
the other sealing lip has a sealing-lip wing which, in a working position of the seal, forms a pressure surface to which pressure can be applied radially
Implementation Method 2
the first sealing lip and the other sealing lip have a thickness which increases continuously from the lip base region in the direction towards the respective freely protruding end
Data Source
AI summary
A seal includes a first sealing lip having a first sealing surface for contacting a first component and at least one other sealing lip having at least one other sealing surface for contacting at least one other component. The sealing lips are connected to one another in a lip base region of the seal and are each freely protruding at the end thereof which is opposite the lip base region and on which the sealing surfaces are arranged. On sides thereof opposite the sealing surface, each has a contact surface. The contact surfaces are spaced apart from one another in the relaxed base position. The seal has a working position provided for sealing the components in which the sealing lips lie supported against one another via the contact surfaces thereof. The other sealing lip has a sealing-lip wing which, in a working position of the seal, forms a pressure surface to which pressure can be applied radially.