Sliding Sealed Connection Assembly for Gas Tightness
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Solution Overview
Problem
Existing sealing assemblies that require both gas tightness and translational movement are often cumbersome, expensive, and difficult to maintain, with high resistance and complex assembly processes, while also occupying significant space and requiring multiple mechanical elements.
Innovation Solution
A sliding sealed connection assembly within a translation plane, comprising a first rigid part with an orifice, a second rigid part with a central surface, a flat seal, and O-rings, which allows for reduced compression force and increased compliance to microreliefs, enabling effective gas tightness with minimal mechanical elements and easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing assembly is designed to provide gas tightness with translational movement capability, then gas sealing is achieved, but the assembly becomes complex with multiple mechanical elements
Solution Approach 1:
The patent combines the sealing function and translational movement function into a single integrated assembly. The flat seal with O-ring configuration allows both gas tightness and movement capability within one unified structure, eliminating the need for separate sealing mechanisms and movement guides.
Solution Approach 2:
The groove structure serves multiple functions simultaneously: it houses the flat seal and O-ring, provides a bearing surface for translational movement, and maintains compression force on the sealing elements. This multi-functional design reduces the number of separate mechanical elements required.
2Reliability
If compression force is increased to improve gas tightness, then sealing effectiveness improves, but sliding resistance increases
Solution Approach 1:
The sealing function is divided between two separate sealing elements: the flat seal for primary gas tightness and the O-ring for secondary sealing and compliance. This segmentation allows each element to be optimized independently, with the O-ring providing compliance to maintain sealing without requiring excessive compression force that would increase sliding resistance.
Solution Approach 2:
The patent changes the physical state and properties of the sealing materials, particularly the O-ring's elastic properties, to provide compliance. This allows the sealing assembly to adapt to surface irregularities and maintain gas tightness with lower compression forces, thereby reducing sliding resistance.
3Reliability
If the groove depth is increased to accommodate both O-ring and flat seal, then sealing capacity improves, but the assembly occupies more space
Solution Approach 1:
The O-ring is positioned within the groove at the bottom, and the flat seal is placed above it, with the flat seal's inner diameter accommodating the O-ring. This nested arrangement allows both sealing elements to be housed in a compact vertical space, maximizing sealing capacity while minimizing the overall assembly footprint.
4Reliability
If multiple sealing elements are used to improve gas tightness, then sealing effectiveness improves, but assembly and maintenance become more difficult
Solution Approach 1:
The flat seal and O-ring are pre-positioned in the groove during manufacturing, with the groove geometry designed to automatically locate and retain these elements. This preliminary arrangement during assembly simplifies the manufacturing process and ensures correct positioning without requiring complex assembly procedures.
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 achieves effective gas tightness with reduced compression force and sliding resistance, allowing for easy movement and minimal maintenance, while using fewer mechanical elements and simplifying assembly, thus addressing the limitations of existing technologies.
Implementation Method 1
the active surface of the flat seal can conform better to the microreliefs of the bearing surface which are located opposite the groove, for the same intensity of the compression force. In other words, the deformation capacity of the plane gasket to penetrate between the roughnesses of the bearing surface is greater for the same intensity of the compression force.
Implementation Method 2
the sliding resistance friction of the active surface of the plane seal on the bearing surface is also reduced accordingly, so that the two parts can be moved relative to each other without excessive effort, parallel to the plane. of translation.
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a chamber including a sealed connection assembly sliding inside a translation plane (P), having two rigid parts (1, 2), one of which comprises a groove (G). A planar seal (3) and at least one O-ring seal (4, 5) are positioned in the groove, with the O-ring seal under the planar seal. An active surface (S3) of the planar seal, which projects above the groove, is compressed against a planar bearing surface (S2) of the other rigid part. The chamber can be used in a device for applying a plastic film onto a spectacle lens, in order to move the lens inside a variable-pressure space.