Angular Cross-Section Ring for Pressure Sensor Positioning
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Solution Overview
Problem
Existing pressure measuring transducers face challenges in stress-free positioning of the pressure measuring cell and precise radial positioning of the sealing ring, especially under pressure loading, due to similar hardness materials leading to inadequate support of the sealing ring.
Innovation Solution
A pressure measuring transducer design incorporating a ring of angular cross-section with a combination of form-retaining and elastic materials, where the elastic component supports the sealing ring radially and the form-retaining component provides axial positioning, along with a decoupling element to manage thermal expansion stresses, ensuring accurate positioning and stress-free operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ring of angular cross section made of elastic material is used to support the sealing ring, then the sealing ring can be supported under pressure loading, but the ring scarcely appears suitable for support of the sealing ring under pressure loading due to similar hardness materials
Solution Approach 1:
The ring of angular cross section is made from a composite material consisting of a hard plastic material (form-retaining component) and an elastic material (elastic component). The hard plastic material provides structural integrity and positioning accuracy, while the elastic material provides support capability for the sealing ring under pressure loading. This composite structure resolves the contradiction by combining materials with complementary properties rather than using a single elastic material.
Solution Approach 2:
Different regions of the ring of angular cross section have different material properties: the form-retaining component (hard plastic) provides rigid positioning structure, while the elastic component provides compliant support. This local differentiation of material quality allows the ring to simultaneously provide precise positioning and reliable support under pressure.
2Strength
If the pressure measuring cell is clamped axially with a tightening apparatus, then the pressure measuring cell is secured in the housing, but the positioning of the sealing ring becomes less exact under pressure loading
Solution Approach 1:
The ring of angular cross section combines hard plastic material for precise positioning and elastic material for compliant support. This composite structure maintains positioning accuracy even when the sealing ring is subjected to pressure loading, as the elastic component deforms to accommodate pressure while the hard plastic component maintains geometric precision.
Solution Approach 2:
The elastic component of the ring changes its physical parameters (deformation) under pressure loading to maintain optimal positioning. The material's elastic properties allow it to adapt its shape and position under varying pressure conditions, maintaining manufacturing precision dynamically rather than statically.
3Device complexity
If a single-material ring of angular cross section is used for positioning, then the construction is simple, but it cannot simultaneously provide form retention and elastic support under pressure
Solution Approach 1:
The positioning ring uses a composite material structure combining hard plastic and elastic materials in a single integrated component. This resolves the contradiction by providing both form-retaining and elastic support functions within one element, avoiding the need for multiple separate components while maintaining reliability under pressure.
Solution Approach 2:
The invention merges the form-retaining function and elastic support function into a single ring of angular cross section made from composite material. This consolidation provides both positioning precision and pressure support capability in one component, simplifying the overall construction while improving reliability.
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 enables stress-free seating of the pressure measuring cell and precise radial positioning of the sealing ring, even under pressure loading, enhancing measurement accuracy and voltage resistance, particularly in smaller pressure measuring cells.
Implementation Method 1
a second component of an elastic material, wherein the at least one form-retaining component forms the radial shoulder and extends in the axial direction into the annular gap, wherein the second component is connected with the first component and extends in the annular gap at least sectionally radially between the lateral surface of the pressure measuring cell and the wall of the measuring cell chamber
Data Source
AI summary
A pressure measuring transducer includes a pressure measuring cell; a measuring cell housing having an annular axial abutment surface, which surrounds an opening; a sealing ring; and a ring of angular cross section for positioning the pressure measuring cell and the sealing ring in the measuring cell chamber. The ring of angular cross section includes at least a first component of a form-retaining material and at least a second component of an elastic material, wherein the at least one form-retaining component forms the radial shoulder and extends in the axial direction into the annular gap, and the second component is connected with the first component and extends in the annular gap at least sectionally radially between the lateral surface of the pressure measuring cell and the wall of the measuring cell chamber.