Hybrid Sealing Ring Structure for High-Pressure Strength
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Solution Overview
Problem
Current sealing ring designs, even those made from hybrid materials, fail to meet the mechanical strength and material property requirements for high-pressure applications, often necessitating additional parts like corner reinforcements or supporting rings, which increases complexity and fabrication costs.
Innovation Solution
A method for producing radial sealing rings using a multicomponent or hybrid longitudinal profile with concentric material layers of differing properties, allowing specific material layers to be positioned along the axial extent of the sealing ring for varying mechanical, optical, and chemical properties, enabling enhanced mechanical strength on the low-pressure side and improved sealing performance on the high-pressure side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sealing rings are made from hybrid materials with concentric layers, then material properties can be varied across the sealing ring, but additional parts like corner reinforcements or supporting rings are still required, increasing complexity and fabrication costs
Solution Approach 1:
The patent applies local quality by creating a longitudinal profile with concentric material layers where each layer has different material properties (e.g., PTFE with different fillers, PEEK, PU) positioned at specific radial and axial locations. This allows different regions of the sealing ring to have optimized properties for their specific functions (sealing, structural support, wear resistance) without requiring additional separate parts.
Solution Approach 2:
The patent utilizes composite materials by combining multiple polymer materials with different properties in a concentric layered structure. The longitudinal profile comprises inner, middle, and outer layers made from different materials (e.g., PTFE with graphite and PBO fibers, PEEK with carbon fibers, PU) that are bonded together to form a single integrated sealing ring structure, eliminating the need for separate reinforcement parts.
2Ease of manufacture
If conventional sealing ring designs are used, then fabrication is simpler, but mechanical strength on the low-pressure side is insufficient for high-pressure applications
Solution Approach 1:
The patent applies parameter changes by modifying the material composition and structural parameters of the sealing ring. The longitudinal profile uses concentric layers with varying material properties (PTFE, PEEK, PU) and incorporates reinforcement elements (graphite, PBO fibers, carbon fibers) at specific locations. The extrusion process parameters are also optimized to achieve the desired density and mechanical properties while maintaining manufacturability.
3Strength
If sealing rings require additional parts for high-pressure applications, then mechanical strength is improved, but fabrication costs increase
Solution Approach 1:
The patent merges multiple functions and material layers into a single integrated longitudinal profile structure. The concentric layers of different materials (PTFE, PEEK, PU) and reinforcement elements are combined during the extrusion process to create one monolithic sealing ring component, eliminating the need for separate corner reinforcements or supporting rings and reducing assembly complexity and fabrication costs.
Solution Approach 2:
The patent uses composite materials to achieve high mechanical strength while maintaining cost-effectiveness. The longitudinal profile combines multiple polymer matrices (PTFE, PEEK, PU) with reinforcement additives (graphite, PBO fibers, carbon fibers) in a concentric layered structure, creating a composite material system that provides the necessary strength for high-pressure applications without requiring additional separate parts.
Data Source
AI summary
A sealing ring for a sealing system in the form of a pneumatic or hydraulic system includes a peripherally arranged sealing edge for dynamically contacting a sealing surface of a machine part. The sealing edge is closed in a ring shape relative to the central axis of the sealing ring. The sealing ring in its unloaded state has, in a section comprising the central axis, a transverse axis which, with the central axis, encloses an angle α with 7°≤α≤90°. The sealing ring may be produced from a longitudinal profile.