Vibration-Damping Plain Bearing Composite for 3D Bushing Forming
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Solution Overview
Problem
Existing plain bearing composites struggle to achieve effective vibration and sound damping while allowing the production of complex three-dimensional geometries without compromising the composite material, and they often lack sufficient elastomer thickness for satisfactory vibration damping.
Innovation Solution
A vibration-damping plain bearing composite comprising a sliding layer, a dimensionally stable support layer, and an elastic layer, where the layers are joined as sheet-like materials to form a robust and flexible composite that can be shaped into complex geometries, with the elastic layer providing effective vibration and noise damping by being integrated between the sliding and support layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the elastomer layer is applied as a solvent-containing wet coating composition to achieve complex shapes, then the production of complex three-dimensional bearing geometries is enabled, but the elastomer layer thickness is insufficient for satisfactory vibration damping
Solution Approach 1:
The patent divides the bearing structure into three separate sheet-like layers (sliding layer, elastomer layer, support layer) that are joined together. This segmentation allows each layer to be optimized independently - the elastomer layer can achieve sufficient thickness for vibration damping while the other layers provide their specific functions, resolving the contradiction between manufacturability of complex shapes and vibration damping performance.
Solution Approach 2:
The patent uses a composite structure consisting of three different material layers joined together. The elastomer layer provides vibration damping, the sliding layer reduces friction, and the support layer provides dimensional stability. This composite approach enables the bearing to achieve complex geometries while maintaining sufficient elastomer thickness for effective vibration damping.
2Reliability
If the elastomer layer thickness is increased to improve vibration damping, then the vibration damping performance is enhanced, but the production of complex three-dimensional geometries becomes difficult without destroying the composite material
Solution Approach 1:
By segmenting the bearing into three separate layers that are joined together, the patent allows the elastomer layer to achieve sufficient thickness for vibration damping while the layer structure enables flexible forming processes. The sheet-like configuration allows the composite to be shaped into complex geometries without the layers interfering with each other during the forming process.
Solution Approach 2:
The use of sheet-like layers, particularly the flexible elastomer layer, enables the composite material to be formed into complex three-dimensional geometries. The sheet structure can be bent and shaped without destroying the material, allowing both sufficient elastomer thickness for vibration damping and the ability to produce complex bearing geometries.
3Ease of manufacture
If the layers are joined to form a robust composite for complex geometries, then the production of complex bearing geometries is enabled, but the vibration damping effectiveness is reduced due to insufficient elastomer thickness
Solution Approach 1:
The patent segments the bearing into three distinct layers joined together, which allows the elastomer layer to achieve sufficient thickness for effective vibration damping. The segmentation enables each layer to contribute its specific function - the elastomer for damping, the sliding layer for low friction, and the support layer for dimensional stability - while the overall composite can be formed into complex geometries.
Solution Approach 2:
The composite structure of three joined layers allows the elastomer layer to achieve the necessary thickness for vibration damping while maintaining the ability to produce complex geometries. The combination of different material properties in the composite enables both robust formation of complex shapes and effective vibration damping performance.
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 composite achieves optimal vibration damping and structure-borne sound decoupling, enabling the production of plain bearing bushings with enhanced comfort and durability, capable of compensating for misalignments and stress peaks, and suitable for various applications including vehicle components and hinges.
Implementation Method 1
the elastic layer which is firmly integrated in the composite can give effective structure-borne sound decoupling, so that the transmission of sound via the bearing can be minimized
Implementation Method 2
an elastic layer, where the plain bearing composite is obtained by: providing the sliding layer, the dimensionally stable support layer and the elastomer layer each in the form of sheet-like material
Data Source
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Figure 8~10
AI summary
A vibration damping plain bearing composite comprises an elastic layer 14, the elastic layer 14 having a first major surface and a second major surface opposite the first major surface, wherein the elastic layer 14 has a thickness of at least 0.15 mm; a sliding layer 10 overlying the first major surface and the sliding layer 10 having a thickness of at least 0.05 mm; and a dimensionally stable support 12 layer overlying the second major surface, the dimensionally stable support layer 12 comprising steel. The vibration damping plain bearing further comprises an axial collar.