Sanitary Insert Sealing Ring Layout for Tolerance-Tolerant Tightness
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Solution Overview
Problem
Existing sanitary insert assemblies require precise machining of cylindrical counter-sealing surfaces to ensure tightness, increasing manufacturing effort and reject rates due to tight manufacturing tolerances.
Innovation Solution
The thickest point of the sealing ring is positioned radially outside the thread area, allowing for non-cylindrical counter-sealing surfaces and enabling the use of sealing rings with varying cross-sectional areas, which can adapt to different fitting geometries, and the counter-sealing surface can be obliquely oriented to simplify fitting processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cylindrical counter-sealing surface is provided on the fitting with small manufacturing tolerances to ensure sufficient tightness, then sealing reliability is improved, but manufacturing complexity and effort increase
Solution Approach 1:
The sealing function is segmented from the counter-sealing surface geometry. The sealing ring is positioned radially outside the thread area, separating the sealing function from the thread engagement function. This allows the counter-sealing surface to have a simpler, non-cylindrical geometry while maintaining sealing effectiveness through the sealing ring's positioning and deformation characteristics.
Solution Approach 2:
The sealing ring provides localized sealing quality at the interface between the insert assembly and fitting. By positioning the thickest point of the sealing ring radially outside the thread area, the sealing function is concentrated in a specific zone that can accommodate varying counter-sealing surface geometries, reducing the need for precise cylindrical machining over the entire interface.
2Reliability
If small manufacturing tolerances are specified for the counter-sealing surface to ensure tightness, then sealing reliability is improved, but the reject rate during manufacturing increases
Solution Approach 1:
The sealing function is segmented from the counter-sealing surface geometry. The sealing ring is positioned radially outside the thread area, separating the sealing function from the thread engagement function. This allows the counter-sealing surface to have a simpler, non-cylindrical geometry while maintaining sealing effectiveness through the sealing ring's positioning and deformation characteristics.
Solution Approach 2:
The invention changes the geometric parameters of the sealing arrangement by positioning the thickest point of the sealing ring radially outside the thread area. This parameter change allows the counter-sealing surface to accommodate larger tolerances while maintaining sealing effectiveness, as the sealing ring can deform to compensate for dimensional variations in the fitting.
3Reliability
If a cylindrical counter-sealing surface is required for proper sealing, then sealing reliability is improved, but adaptability to different fitting geometries is reduced
Solution Approach 1:
The sealing ring design with its thickest point positioned radially outside the thread area provides universal adaptability to different fitting geometries. The sealing ring can function with non-cylindrical counter-sealing surfaces, conical surfaces, or other geometries, making the insert assembly versatile for different fitting types while maintaining reliable sealing through the sealing ring's deformation and contact characteristics.
Data Source
AI summary
In a sanitary insert assembly (1) with a thread (6) and a sealing ring (7), it is provided that a thickest point (8) of the sealing ring (7) is arranged outside a thread area (9) radially occupied by the thread (6).