Heat Shield Decoupling Element for Tolerance and Vibration Isolation
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Solution Overview
Problem
Heat shields in exhaust systems face challenges in accommodating large tolerances between components, as traditional decoupling elements are firmly attached to the metallic sheet metal layer, limiting their ability to compensate for positional variations at fastening points, leading to inefficient heat and vibration transmission.
Innovation Solution
A decoupling element comprising a sleeve with axial end portions, pressure absorption elements, and damping elements, along with locking discs that allow for adjustable clamping force and lateral displacement, enabling the decoupling element to be securely fastened yet adaptable to varying attachment points, thereby accommodating different component tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the decoupling element is firmly fastened to the sheet metal layer of the heat shield, then the fastening is secure and reliable, but the heat shield cannot compensate for tolerances at the attachment points on the component
Solution Approach 1:
The decoupling element is designed with a damping element that allows controlled movement and deformation. The damping element can deform elastically to accommodate tolerance variations while maintaining secure fastening, transforming the static firm connection into a dynamic adaptive connection that absorbs positional deviations.
Solution Approach 2:
The damping element changes its physical state through elastic deformation under load. When the heat shield is mounted, the damping element compresses or deforms to absorb tolerance variations, allowing the system to adapt to different component positions while maintaining reliable fastening through the same decoupling element.
2Stability of the object's composition
If the decoupling element is firmly fastened to the sheet metal layer, then the attachment is stable, but the position of passage openings cannot be varied to accommodate tolerance differences
Solution Approach 1:
The decoupling element incorporates a damping element that provides controlled compliance. This damping element can deform to accommodate variations in passage opening positions while maintaining stable attachment, allowing the system to adapt to tolerance differences without compromising attachment stability.
3Device complexity
If traditional decoupling elements are used, then the structure is simple, but they cannot compensate for large tolerances between exhaust system components
Solution Approach 1:
The damping element utilizes elastic deformation to compensate for tolerance variations. By selecting appropriate material properties and geometric parameters for the damping element, the decoupling element can accommodate large positional variations while maintaining a relatively simple overall structure that integrates seamlessly with the heat shield and fastening system.
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 decoupling element effectively compensates for positional tolerances, ensuring secure fastening while minimizing heat and vibration transmission, allowing for easy installation and use with various fastening elements, and preventing media passage through the fastening opening.
Implementation Method 1
a damping element, the damping element being arranged starting from the pressure absorption element in the direction of the second axial end portion of the sleeve
Implementation Method 2
The lower part has a first pressure absorption element and a damping element
Data Source
AI summary
A decoupling element for fastening a heat shield. The heat shield comprising a passage opening for a fastener. The decoupling element comprising: a middle part containing a sleeve, a lower part arranged adjacent to the first axial end portion of the sleeve, a first damping element arranged on the second side of the first pressure absorption element, an upper part arranged adjacent to the second axial end portion of the sleeve, and a second damping element arranged on the second side of the second pressure absorption element.