Pressure Sensor Mounting Ring Axial Stop Positioning
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Solution Overview
Problem
Existing pressure sensor modules are difficult to assemble and replace, and they often suffer from positioning inaccuracies due to tolerances in the clamping of the pressure measuring cell against seals.
Innovation Solution
A pressure sensor module with a mounting ring that includes a platform and a measuring membrane, where the membrane is connected pressure-tightly to the platform, and a mounting passageway with an inner axial stop plane and recess to precisely position the pressure measuring cell independently of adhesive distribution and manufacturing tolerances, using a ceramic material and glass fiber reinforced plastic for enhanced durability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pressure measuring cell is clamped against a seal to equalize positioning tolerances, then positioning accuracy is improved, but assembly complexity and difficulty increase
Solution Approach 1:
The mounting ring is segmented into distinct functional surfaces: an inner mounting surface with an axial stop plane for positioning the pressure measuring cell, and an outer mounting surface for mounting the entire assembly. This segmentation allows each surface to independently address positioning requirements without increasing overall assembly complexity.
Solution Approach 2:
The inner mounting surface acts as an intermediary element between the pressure measuring cell and the mounting structure. By providing a precisely defined axial stop plane on this intermediate surface, the patent achieves accurate positioning without requiring complex clamping mechanisms against seals.
2Ease of manufacture
If adhesive is used to mount the pressure measuring cell, then assembly is simplified, but positioning accuracy deteriorates due to adhesive distribution tolerances
Solution Approach 1:
The axial stop plane is formed preliminarily on the inner mounting surface before adhesive application. This pre-defined stopping surface ensures that the pressure measuring cell is positioned accurately as it is being adhesively mounted, eliminating the positioning errors that would otherwise result from adhesive distribution variations alone.
Solution Approach 2:
The patent changes the geometric parameter of the mounting surface by introducing an axial stop plane with a specific orientation (perpendicular to the mounting axis). This parameter change transforms the adhesive mounting process from one subject to positioning tolerances into one where the stop plane controls position and the adhesive merely provides fixation.
Data Source
AI summary
A pressure sensor module, comprising: a pressure measuring cell; and a mounting ring. The pressure measuring cell includes a platform and a measuring membrane, whose front face extends parallel to the rear face of the platform. The mounting ring has a mounting passageway with an inner mounting surface, which defines an inner axial stop plane for mounting the pressure measuring cell, wherein the mounting ring has an outer mounting surface, and the pressure measuring cell is inserted with the rear face preceding into the mounting passageway. The rear face of the platform is adhered with the inner mounting surface, wherein the inner mounting surface has a shoulder, which extends from an inner lateral surface of the mounting ring radially inwards. The mounting surface has between the axial stop surface and the inner lateral surface an annularly surrounding recess, in order to accommodate excess adhesive in the case of the adhering of the axial stop surface with the rear face of the platform.