Ring Seal with Convex Abutment Prevents Rotation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pipe connections with annular beads and seals face challenges in achieving a reliable fit and preventing the ring seal from rotating or 'rolling' during the insertion of the inner pipe, leading to potential leaks and instability.
Innovation Solution
A ring seal design featuring a base body positioned within the annular bead with a radially convex abutment and sealing lip, where the abutment has a convex profile that prevents rotation by accumulating material and ensuring contact only after the inner pipe strikes the sealing lip, along with an additional sealing tip and asymmetrical sealing lip for enhanced sealing and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional annular seal is used in the annular bead, then the seal can be installed in the groove, but the seal rotates or rolls during insertion of the inner pipe leading to unreliable sealing
Solution Approach 1:
The sealing lip is designed with an asymmetrical cross-sectional profile featuring a convex abutment on the insertion side and a concave sealing surface on the opposite side. This asymmetrical geometry prevents rotational movement by creating a mechanical interlock where the convex abutment engages with the inner pipe while the concave sealing surface maintains contact, ensuring the seal remains stationary during insertion and operation.
Solution Approach 2:
The sealing lip incorporates curved surfaces including a convex abutment and a concave sealing surface instead of flat or angular geometries. The curved profile allows the sealing lip to deform and conform to the inner pipe surface while the convex-concave configuration prevents rolling by creating a mechanical constraint that resists rotational forces during insertion.
2Reliability
If the sealing lip is designed to contact the inner pipe, then sealing is achieved, but the seal may rotate or roll during insertion
Solution Approach 1:
The sealing lip employs an asymmetrical profile with a convex abutment on the insertion side that contacts the inner pipe first, followed by a concave sealing surface. This asymmetric design ensures that the seal engages the inner pipe in a controlled manner that prevents rotation, making insertion stable and reliable without compromising ease of operation.
Solution Approach 2:
The convex abutment is positioned to engage with the inner pipe before the main sealing surface makes contact. This preliminary engagement action guides the inner pipe into proper alignment and prevents rotational movement before the sealing lip establishes its sealing contact, ensuring stable insertion.
3Stability of the object's composition
If the abutment profile is convex and accumulates material, then rotation is prevented, but the structure becomes more complex
Solution Approach 1:
The convex abutment and concave sealing surface are merged into a single continuous sealing lip structure rather than being separate components. This integration achieves the anti-rotation function and sealing contact simultaneously through one unified asymmetric profile, reducing overall structural complexity while maintaining the necessary functional elements.
Solution Approach 2:
The asymmetric sealing lip profile serves multiple functions: the convex abutment prevents rotation, the concave surface provides sealing contact, and the continuous profile ensures structural integrity. This multi-functional design achieves anti-rotation capability without requiring additional separate components, thereby limiting the increase in device 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 sealing contact by preventing the ring seal from rotating, maintaining a tight fit and effective sealing even under slight misalignment or pressure variations, thereby enhancing the overall sealing performance.
Implementation Method 1
Under the pressure of the inner tube 4 moving in the direction of insertion 10, the sealing lip 6 deforms and bends in the direction of the contact area 29 of the base body 5 of the ring seal 1
Implementation Method 2
The ring seal has a base body which, in the installed state, is arranged essentially within the annular bead and also has a radially circumferential sealing lip
Data Source
Figure 1
Figure 2~4
Figure 5
AI summary
In a ring seal (1) for use in an annular groove (3) of an outer tube (2) for sealing the outer tube (2) against an inner tube (4) to be inserted into the outer tube (2), the ring seal (1) has a base body (5) that can be positioned substantially in the annular groove (3) and a radially circumferential sealing lip (6) extending from the base body (5), which, in the installed state, projects beyond the annular groove (3) and is intended to form a sealing contact with the inner tube (4). In cross-section, the base body (5) of the ring seal (1) has an abutment (7) on the side from which the inner tube (4) is inserted, the abutment (7) having an upwardly convex profile and being separated from the sealing lip (6) in profile.