Heat Shield Flange Connection for Constant Prestress
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Solution Overview
Problem
Conventional heat shields face challenges in maintaining consistent prestressing due to varying insulation layer thicknesses and component dimensions, leading to reduced thermal conductivity and vibration stability.
Innovation Solution
The heat shield design features outwardly bent flanges with through-openings and adjacent tabs that connect radially, allowing for tolerance compensation and maintaining constant prestress, ensuring close alignment of force lines with the insulating layer and reducing bending forces on flanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional heat shields use flanges connected far from the insulating layer, then the connection structure is simple, but high bending forces cause flange flexing and springback, reducing preload and insulation quality
Solution Approach 1:
The patent moves the connection point from the radial dimension (far from insulating layer) to the axial dimension (immediately adjacent to insulating layer). By positioning the connection at the axial end of the insulating layer rather than radially outward, the force flow aligns directly with the insulating layer, eliminating bending moments while maintaining manufacturing simplicity through the flange-tab configuration.
2Adaptability or versatility
If heat shields are designed to accommodate varying insulation thicknesses and component dimensions, then adaptability improves, but consistent preload maintenance becomes difficult due to accumulating tolerances
Solution Approach 1:
The patent changes the geometric parameters of the connection structure by positioning the flange and tab immediately adjacent to the insulating layer rather than at a fixed radial distance. This parameter change allows the connection to naturally accommodate variations in insulation thickness and component dimensions while maintaining consistent preload, as the connection point moves with the insulating layer boundary.
3Ease of manufacture
If flanges are positioned radially far from the insulating layer for simple connection, then manufacturing is easier, but thermal conductivity and vibration behavior deteriorate due to reduced compression
Solution Approach 1:
The insulating layer itself becomes the intermediary that positions the connection structure. By placing the flange and tab immediately adjacent to the insulating layer, the insulating layer mediates between the connection structure and the heat shield body, ensuring optimal compression for thermal conductivity while maintaining manufacturing ease through the flange-tab engagement design.
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 design ensures long-term good compression and optimal thermal conductivity and vibration behavior, even with different insulation thicknesses and component dimensions, preventing flange springing and maintaining defined prestress.
Implementation Method 1
a constant preload of the connection between individual parts of the heat shield is ensured... ensuring close alignment of force lines with the insulating layer
Implementation Method 2
Heat shields are used in a variety of ways to thermally and/or acoustically insulate a hot body
Implementation Method 3
optimal thermal conductivity... is guaranteed
Data Source
Figure 1~2B
Figure 3A~3C
Figure 4A~4C
AI summary
Heat shield (10) for thermal and/or acoustic shielding of a body (2) with a metallic layer (11) which surrounds the body such that two opposing outer edges (14a, 14b) are arranged adjacent to each other and are connected to each other to close the surround around the body (2), wherein the first outer edge (14a) has an outwardly bent flange (15a) which has a through-opening (16) and the second outer edge (14b) has a circumferentially projecting tab (17) which is passed through the through-opening (16) and is attached behind the through-opening (16) to the outwardly bent flange of the first outer edge (14a) by bending, winding or twisting.