Z-Shaped Sealing Ring Anti-Tipping Design
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Solution Overview
Problem
Existing sealing arrangements face challenges in preventing the sealing lip from tipping over during assembly and under excess pressure, while also maintaining low friction and reliable sealing performance.
Innovation Solution
A Z-shaped sealing ring design with first and second sealing lip sections of equal thickness, merging radially without offset, where the first section provides radial elastic pretension and the second section acts as a supporting body, preventing axial tipping and ensuring low friction through a capillary-active gap and return twist structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing lip is made flexible to prevent lifting under pressure, then sealing reliability improves, but the risk of tipping over during assembly increases
Solution Approach 1:
The sealing lip is divided into two distinct sections: a first sealing lip section that contacts the surface to be sealed and a second sealing lip section that acts as a counterweight. This segmentation allows each section to perform its specific function - the first section provides sealing while the second section prevents tipping during assembly, resolving the contradiction between sealing reliability and assembly safety.
Solution Approach 2:
The patent changes the geometric parameters of the sealing lip by creating an asymmetric two-section design where the sections have different lengths and functions. The second section extends further axially to provide a counterbalancing moment that prevents tipping, while the first section maintains optimal contact for sealing. This parameter optimization resolves the contradiction between flexibility for sealing and stability for assembly.
2Reliability
If the sealing lip is pressed firmly against the surface to prevent leakage, then sealing performance improves, but friction increases
Solution Approach 1:
The patent applies local quality by making only the first sealing lip section contact the surface to be sealed, while the second sealing lip section remains non-contacting. This localized contact ensures that friction is generated only where necessary for sealing performance, while the non-contacting second section does not contribute to friction, thus resolving the contradiction between sealing performance and friction reduction.
3Ease of operation
If the sealing ring structure is simplified for easier assembly, then ease of operation improves, but the ability to prevent tipping under excess pressure may be compromised
Solution Approach 1:
The second sealing lip section acts as a self-service counterweight that automatically prevents tipping during assembly without requiring additional components or complex mechanisms. The geometric design of the two-section lip creates an inherent anti-tipping moment that operates passively during assembly, simplifying the overall structure while maintaining anti-tipping capability.
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 design simplifies assembly, prevents tipping and lifting, and allows for low-friction operation by ensuring the first sealing lip section contacts the surface under radial elastic pretension, while the second section supports the lip under high pressure, maintaining effective sealing without material accumulation issues.
Implementation Method 1
the first sealing lip section on the surface to be sealed radially facing side has a return twist for the medium to be sealed in the direction of the sealed space and wherein the second sealing lip section is assigned to the surface to be sealed adjacent to it at a radial distance and the gap formed by the distance is of capillary-active narrowness
Implementation Method 2
the second sealing lip section is assigned to the surface to be sealed adjacent to it at a radial distance and the gap formed by the distance is of capillary-active narrowness
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Sealing ring comprises a radial sealing lip (2) with a lip section (6) including an acute angle in the direction of the chamber to be sealed against the assembly direction (15) of a machine element (14). An independent claim is also included for a sealing arrangement comprising the above sealing ring. Preferred Features: The fixing region (1) and the connecting bar (3) of the sealing ring are connected together by a hinged transition region (9).