Packing Gasket Track Geometry for Stable Fluid Sealing
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Solution Overview
Problem
Existing sealing systems for fluids, particularly those using packing braids, face challenges in maintaining seal integrity due to terminal edge joining issues, which lead to slackening from temperature and pressure variations, and are costly and difficult to install for large or complex shapes.
Innovation Solution
A sealing system with a housing and containing track design that accommodates the ends of a packing braid gasket, featuring a wider section to house both ends and compensate for compression, ensuring parallelism and correct compression of the gasket, allowing for easy assembly and disassembly, and suitable for various applications including high temperatures and aggressive chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packing braid ends are joined together to form a continuous seal, then sealing continuity is improved, but terminal edge joining causes slackening under temperature and pressure variations
Solution Approach 1:
The housing and containing track is divided into a first part with constant width and a second part with greater width. The first part accommodates the intermediate sections of the packing braid, while the second part specifically houses the joined ends. This segmentation allows the seal to maintain continuity while providing a dedicated space for the joint, preventing slackening under operational conditions.
2Reliability
If gasket is made in a single piece through die or mechanical working, then sealing perimeter integrity is improved, but manufacturing cost and difficulty increase for large or complex shapes
Solution Approach 1:
The housing and containing track changes its width parameter along its length, transitioning from a first part with constant width to a second part with greater width. This parameter change allows the structure to accommodate the joined ends of the packing braid while maintaining appropriate compression in the first part, enabling continuous sealing without requiring expensive single-piece manufacturing for large or complex shapes.
3Reliability
If packing is compressed in housing to guarantee seal, then sealing effectiveness is improved, but compression causes dilatations and pressure-induced slackening at joined ends
Solution Approach 1:
The housing and containing track exhibits local quality variation through its width changes. The first part maintains constant width to provide uniform compression for the intermediate sections of the packing braid, ensuring sealing effectiveness. The second part increases width to specifically accommodate the joined ends, providing relief from excessive compression that would otherwise cause slackening at the joints.
Data Source
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AI summary
A sealing system (10) for fluids is described, comprising a sealing gasket (12) of the packing type, a housing and containing track (11) adapted to house the sealing gasket (12) of the packing type and comprising at least one internal wall (14) and one external wall (15), the housing and containing track (11) comprising a first part (18) having a substantially constant width and a second part (19) having a width greater than the width of the first part (18), the sealing gasket (12) of the packing type being inserted into the track (11) with a first end (21) and a second end (22) of the sealing gasket (12) of the packing type overlapped inside the second part (19) having a greater width.