Thermal Sensor Tube Ribs Reduce Heat Conduction
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Solution Overview
Problem
Conventional thermal sensor assemblies face challenges in achieving a robust mechanical connection while minimizing thermal conductivity between the sensor tube and housing, which affects durability and temperature measurement accuracy.
Innovation Solution
The implementation of raised ribs on the sensor tube to create an interference fit with the housing bore, reducing the total surface area contact and thus thermal conductivity, while maintaining a rigid mechanical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the sensor tube is rigidly connected to the sensor housing using welding or machining, then the mechanical connection strength is improved, but the thermal conductivity from the sensor tube to the housing increases
Solution Approach 1:
The connection interface between the sensor tube and housing is segmented into multiple discrete contact points (protrusions contacting recesses) rather than a continuous contact surface. This segmentation maintains mechanical strength through multiple load-bearing points while reducing overall thermal conduction path area.
Solution Approach 2:
The connection structure uses localized protrusions and recesses at specific positions around the circumference, creating areas of high mechanical strength (at contact points) and areas of low thermal conduction (between contact points). This local differentiation allows simultaneous optimization of both mechanical and thermal properties.
2Stability of the object's composition
If the sensor tube is press-fitted into the housing with full surface contact, then the mechanical connection stability is improved, but the thermal conductivity from the sensor tube to the housing increases
Solution Approach 1:
The continuous contact surface is replaced with discrete segmented contact points formed by protrusions and recesses. This provides sufficient mechanical stability through distributed contact points while creating thermal barriers in the non-contact regions.
Solution Approach 2:
The protrusion-recess structure acts as an intermediary mechanical feature that enables stable connection without full surface contact. The geometry of these intermediaries provides both mechanical interlocking and thermal isolation.
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 configuration provides a durable and accurate thermal sensor assembly with reduced thermal conductivity, ensuring precise temperature measurements and enhanced mechanical stability.
Implementation Method 1
The raised ribs are configured to provide an interference fit between the sensor tube and the housing
Implementation Method 2
reducing the total surface area contact and thus thermal conductivity
Data Source
AI summary
A thermal sensor having a robust mechanical connection between a thermal sensor housing and thermal sensor tube is provided having a cross-sectional shape configured to provide a reduced thermal conductivity between the sensor and the housing.