Seal Arrangement With Low-Pressure Support Body
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Solution Overview
Problem
Existing sealing arrangements are prone to wear and reduced sealing effectiveness due to unfavorable pressure distribution and deformation of the sealing lip, leading to leaks and increased wear on the sealing surfaces, especially under dynamic conditions.
Innovation Solution
A sealing arrangement with a support body on the low-pressure surface side that divides the high-pressure surface area of the sealing lip into partial surfaces on the sealing edge and retaining element sides, allowing a tilting moment to relieve the sealing edge and prevent excessive pressing, thereby reducing deformation and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If pressure is applied to the high-pressure surface area of the sealing lip, then the sealing edge is pressed more strongly against the sealing surface, but the sealing lip deforms on the low-pressure surface side causing the sealing edge to lift off
Solution Approach 1:
By dividing the high-pressure surface area into two partial surfaces with different areas, the support body creates an asymmetric pressure distribution. This segmentation generates a tilting moment that counteracts the lifting effect caused by pressure-induced deformation on the low-pressure side, maintaining continuous contact between the sealing edge and sealing surface.
Solution Approach 2:
The support body is positioned asymmetrically on the sealing lip such that the first partial surface area on the sealing edge side differs from the second partial surface area on the holding element side. This asymmetric configuration creates a deliberate tilting moment that compensates for the deformation tendency, preventing the sealing edge from lifting off during operation.
2Adaptability or versatility
If the sealing lip is elastic to allow deformation, then the sealing edge can adapt to sealing surface variations, but excessive deformation leads to unfavorable pressure distribution and increased wear
Solution Approach 1:
The support body segments the high-pressure surface area, creating a controlled deformation pattern. This segmentation allows the sealing lip to deform elastically for adaptation while the resulting tilting moment prevents excessive deformation, thereby reducing wear on the sealing edge despite the elastic material's tendency to deform under 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
The solution effectively reduces wear and maintains high reliability of the sealing function by preventing excessive deformation of the sealing edge, ensuring consistent sealing performance even under pressure peaks and dynamic conditions.
Implementation Method 1
the sealing lip is elastic, applying pressure to the high-pressure surface area results in the sealing edge being pressed more strongly against the sealing surface
Implementation Method 2
the support divides a high-pressure surface area of the sealing lip into a partial surface on the sealing edge side and a partial surface on the holding element side
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a seal for sealing a sealing surface (2) between a first machine part (1) having a seal accommodating structure, preferably a groove, and a second machine part (3), which can be moved relative to the first machine part (1) and which has the sealing surface (2), wherein a high-pressure area between the machine parts (1, 3) can be sealed off from a low-pressure area by the seal, comprising - a retaining element (5) for fixing the position of the seal in the seal accommodating structure, and - a sealing lip (6) made of an elastomer material formed on the retaining element (5) and having a sealing edge (7) formed on a free end of the sealing lip (6) for contacting the sealing surface (2), wherein the sealing lip (6) has a high-pressure surface area (10) that adjoins the high-pressure area and a low-pressure surface area (11) that adjoins the low-pressure area. The seal has a supporting element (15), wherein the supporting element (15) forms a support of the sealing lip (6), the support of which is on the low-pressure surface side and extends substantially parallel to the sealing edge (7), and wherein the support is arranged between the sealing edge (7) and the retaining element (5).