Circular Gasket Sealing for Pressure Sensor Moisture Protection
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Solution Overview
Problem
Conventional pressure sensors in moisture-rich environments face sealing issues due to leaks around the gasket, affecting measurement accuracy.
Innovation Solution
A pressure sensor unit with a circular gasket featuring a compression region, sloped region, central passage, and integrated ridges, which provides enhanced sealing performance through increased surface area and reliable sealing force, allowing for improved environmental sealing and electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional gasket is used for sealing the pressure sensor, then the sensor is protected from moisture-rich environments, but leaks occur around the gasket causing measurement problems
Solution Approach 1:
The gasket is divided into multiple functional regions: a compression region for initial sealing contact, a sloped region for enhanced sealing under pressure differentials, and a central region for sensor mounting. This segmentation allows each region to perform its specific sealing function optimally, preventing leaks that occur with conventional uniform gaskets.
Solution Approach 2:
Different regions of the gasket are designed with different geometries and material properties tailored to their specific functions. The compression region has higher density for initial contact, the sloped region has optimized geometry for pressure differential sealing, and the central region accommodates the sensor. This local optimization ensures reliable sealing in each critical area.
2Reliability
If the gasket is compressed to improve sealing, then sealing performance increases, but the sensor may be damaged or the seal may fail under pressure differentials
Solution Approach 1:
The gasket design allows dynamic adjustment of sealing force. The sloped region geometry enables the gasket to deform and redistribute compression forces in response to pressure differentials, maintaining sealing contact without applying excessive static compression that could damage the sensor or cause seal failure.
Solution Approach 2:
The compression region is designed with optimized material density and geometry to absorb and distribute compression forces before they reach the sensor. This pre-cushioning effect protects the sensor from excessive compression forces while still achieving reliable sealing at the housing interface.
3Reliability
If a larger gasket surface area is used to improve sealing, then sealing performance improves, but the device complexity and manufacturing cost increase
Solution Approach 1:
Multiple sealing functions are merged into a single integrated gasket component. The compression region, sloped region, and central region are combined in one piece that simultaneously provides initial sealing, pressure differential sealing, and sensor mounting. This integration achieves enhanced sealing performance without the complexity of multiple separate sealing components.
Solution Approach 2:
The gasket serves multiple functions: sealing against the housing, sealing against the sensor, accommodating pressure differentials, and providing a mounting surface for the sensor. This multi-functionality is achieved within a single component design, avoiding the need for multiple specialized parts and reducing overall device complexity.
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 enhances sealing performance, reduces contamination, and maintains a reliable seal under pressure differentials, ensuring accurate pressure measurements and cost-effectiveness.
Implementation Method 1
The sealing edge may compress the gasket in the compression region and in the sloped region
Implementation Method 2
a sloped region adjoining the compression region
Data Source
AI summary
An apparatus includes a gasket and a housing assembly. The gasket may have (i) a compression region around an outer perimeter, (ii) a sloped region adjoining the compression region, (iii) a central region and (iv) a passage in communication with an exterior of the apparatus. The housing assembly may have a sealing edge and may be configured to hold a sensor. The sealing edge may compress the gasket in the compression region and in the sloped region. The sensor (a) may seal to the central region of the gasket and (b) may be in communication with the exterior of the apparatus through the passage.