Pressure Sensor Assembly with Preformed Resin Seal
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Solution Overview
Problem
Existing pressure sensor assembly methods are complex and costly, and adhesives used in these methods provide limited hermeticity, especially when dealing with flammable gases.
Innovation Solution
A method involving a housing with a sensor chamber and a pressure connector, a subassembly with an electrical connector and a pressure sensing element, and a preformed resin component with a hole, where the resin component is positioned between the pressure connector and the pressure sensing element, pressed together, and cured to create a hermetic connection, eliminating the need for additional adhesives and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesives are used to connect components in the housing, then assembly is simplified, but hermeticity is compromised due to permeability of adhesive materials
Solution Approach 1:
The patent removes adhesive materials from the hermetic sealing function entirely. Instead of using permeable adhesives to bond components, the invention extracts the sealing function and assigns it to a dedicated metal hermetic seal (e.g., bellows or flange) that provides both mechanical connection and impermeable sealing, eliminating the contradiction between ease of assembly and hermeticity.
Solution Approach 2:
The patent introduces a metal hermetic seal as an intermediary component between the housing and sensor assembly. This intermediary element serves dual purposes: providing mechanical support/alignment and ensuring hermetic sealing, thereby resolving the contradiction by decoupling the structural and sealing functions that were previously combined in adhesive materials.
2Ease of manufacture
If multiple prefabricated subassemblies are assembled to reduce costs, then manufacturing complexity increases
Solution Approach 1:
The patent combines the hermetic sealing function with the mechanical connection function into a single integrated metal seal component. This merging eliminates the need for separate adhesive application steps and gap management arrangements, reducing assembly complexity while maintaining cost-effectiveness through simplified manufacturing processes.
Solution Approach 2:
The metal hermetic seal is pre-formed with integrated sealing and structural features before assembly. This preliminary preparation of the seal component with built-in alignment and sealing geometries simplifies the final assembly process, reducing the need for complex adjustment and alignment procedures during manufacturing.
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
This method ensures a reliable, hermetic connection that prevents fluid leakage and reduces assembly costs by simplifying the assembly process while maintaining the integrity of pressure measurements over time.
Implementation Method 1
curing the resin component to create a hermetic connection between the pressure connector and the pressure sensing element
Data Source
AI summary
A pressure sensor arrangement includes a housing with a sensor chamber and a pressure connector with a fluid inlet opening and a fluid channel, a subassembly with an electrical connector and a pressure sensing element, and a preformed resin component with a hole and an embedded carrier structure. A method for assembling a pressure sensor arrangement includes the steps of: positioning the preformed resin component at the pressure connector such that the fluid inlet opening and the hole communicate with each other, pressing the subassembly against the preformed resin component such that the pressure sensing element communicates with the hole, fixing the housing to the subassembly, and curing the resin component to create a hermetic connection between the pressure connector and the pressure sensing element. The invention further discloses a pressure sensor arrangement including a housing with a sensor chamber and a pressure connector with a fluid inlet opening and a fluid channel, a subassembly with an electrical connector and a pressure sensing element, and a preformed resin component with a hole provided between the subassembly and the pressure connector, wherein the pressure sensor arrangement is assembled by the previously described method.