Wire Mesh Grommet Structure for High-Temperature Sensor Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing grommets in fire and overheat detection systems degrade at high temperatures and require substantial assembly time, failing to securely hold sensing elements in high-vibration aircraft engine environments.
Innovation Solution
A metallic wire mesh grommet with a central aperture and slit, made from SS304A alloy or similar materials, that can withstand up to 1100°C, featuring tapered sections for secure fitting and easy insertion, and lined strands for anti-abrasion protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic or PTFE grommets are used, then ease of manufacture is improved, but temperature resistance deteriorates as they degrade at high temperatures
Solution Approach 1:
The grommet material is changed from plastic/PTFE to metallic wire mesh, fundamentally altering the material parameter to achieve high temperature resistance while maintaining manufacturability through wire mesh construction techniques
Solution Approach 2:
The grommet is constructed as a composite structure with metallic wire mesh providing thermal stability and an inner lining providing protection for the sensing element, combining the advantages of different materials
2Ease of operation
If conventional grommets are used, then assembly simplicity is improved, but assembly time increases due to substantial assembly time required
Solution Approach 1:
The grommet is designed with a slit that divides the structure, allowing the sensing element to be inserted through the slit and secured in the central aperture, enabling quick assembly without complex fastening operations
Solution Approach 2:
The grommet is pre-formed with the central aperture and slit, and the tapered sections are pre-configured to guide the sensing element into place, eliminating the need for complex assembly steps
3Weight of moving object
If conventional grommets are used, then weight is reduced, but securing capability deteriorates as they fail to securely hold sensing elements in high-vibration environments
Solution Approach 1:
The tapered sections at opposite longitudinal ends of the grommet create a conical geometry that, when compressed between the clamp and sensing element, generates friction and mechanical interlocking to prevent sliding in high-vibration environments
Solution Approach 2:
The grommet features localized tapered sections at the ends for mechanical engagement and a central aperture for securing the sensing element, concentrating the securing function at critical locations
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 wire mesh grommets provide durable, high-temperature resistance, secure sensing element retention, and reduced assembly time, while minimizing weight and preventing abrasion, ensuring reliable operation in harsh engine environments.
Implementation Method 1
the metallic wire mesh can withstand temperatures of up to 1100°C
Implementation Method 2
the elongated body includes tapered sections at opposite longitudinal ends thereof to prevent a sliding of the grommet in the FODS clamp
Implementation Method 3
each strand of the metallic wire mesh is lined
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
A grommet is provided for use in a fire and overheat detection system (FODS) clamp. The grommet includes an elongated body defining a central aperture and a slit. The elongated body includes wire mesh.