Torsional Vibration Damper Coated Flywheel Ring
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Solution Overview
Problem
Existing torsional vibration dampers have complex structures and high manufacturing, assembly, and logistics costs due to separate production and assembly of slide bearings, which are made of plastic with low frictional resistance.
Innovation Solution
The flywheel ring is coated with a first coating forming a preassembled unit with integrated radial and axial bearings, and a second coating that changes volume with temperature to compensate for viscosity changes in the damping medium, allowing for a simple, low-parts structure with improved temperature compensation and reduced friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate slide bearings are manufactured and assembled, then the bearing function is achieved, but manufacturing and assembly costs increase
Solution Approach 1:
The patent merges the slide bearing function with the flywheel ring by applying a coating material directly to the flywheel ring surface. This integration eliminates separate bearing components and their assembly, reducing manufacturing complexity and costs while maintaining the low-friction bearing function through the coating material's properties
2Ease of manufacture
If a simple coating structure is used, then manufacturing is simplified, but temperature compensation capability is insufficient
Solution Approach 1:
The patent employs a composite coating structure with at least two different coating materials applied to the flywheel ring. The first coating material provides low-friction bearing properties, while the second coating material has different thermal expansion characteristics that enable temperature compensation. This composite approach maintains manufacturing simplicity through direct application while achieving sophisticated temperature adaptability
3Ease of operation
If plastic plain bearings are used, then frictional resistance is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent combines the flywheel ring and slide bearing into a single integrated component by applying a plastic coating material directly to the flywheel ring surface. This eliminates the need for separate bearing parts while maintaining the low-friction characteristics of plastic bearings, thereby reducing device complexity without sacrificing operational ease
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 simplifies production, reduces costs, and maintains consistent performance characteristics across temperature variations by automatically adjusting the damping gap, ensuring effective torsional vibration damping with minimal temperature-related performance changes.
Implementation Method 1
Hydraulically damping torsional vibration dampers work by shearing the damping medium located in the working chamber. During the intended use of the torsional vibration damper, the flywheel ring moves freely and can be rotated relative to the damper housing in the working chamber. This creates alternating shearing of the viscous damping medium, which causes the damping effect. In this way, mechanical energy is converted into heat, which is dissipated via the damper housing surrounding the flywheel ring.
Implementation Method 2
The surface not covered by the first coating is covered by a second coating, the volume of the second coating changing more than the material from which the flywheel ring is made as a function of temperature.
Data Source
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AI summary
The present invention relates to a torsional vibration damper with a damper housing (1) which is provided with an operating cavity (2) filled with damping medium (3) and in an annular duct shape, wherein in the operating cavity (2), a flywheel ring (5) capable of moving freely is arranged along a circumferential direction, and wherein, the flywheel ring (5) is supported in the operating cavity (2) through at least one sliding bearing (6), wherein the sliding bearing (6) is formed by a first coating (7) of the flywheel ring (5), and the first coating at least partly covers a surface (8) of the flywheel ring.