Integrated Torsional Vibration Damper With Torsion Spring Rod
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Solution Overview
Problem
Existing torsional vibration absorption devices in internal combustion engines are complex, prone to wear, and can detune due to mounting issues, leading to inefficient vibration control.
Innovation Solution
A structurally simpler and more robust design where the absorber mass is connected via a torsion spring rod or integrated as a flexible spring element within the component, eliminating the need for additional spring elements and ensuring precise alignment for effective wear-free operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional torsional vibration absorption devices are used with separate mounting of absorber mass and spring elements, then vibration absorption function is achieved, but device complexity increases and wear occurs in bearing elements
Solution Approach 1:
The absorber mass is integrated directly into the rotating component (crankshaft, flywheel, or pulley) as a single structural unit, eliminating separate mounting of absorber mass and spring elements. This merging of components reduces device complexity while eliminating wear in bearing elements that would otherwise be required to connect separate parts.
Solution Approach 2:
The rotating component serves multiple functions simultaneously: it provides the structural support, contains the absorber mass for vibration absorption, and eliminates the need for separate bearing elements. This multi-functionality reduces the number of parts and simplifies the overall device structure while maintaining reliability.
2Reliability
If leaf springs are used to mount absorber mass, then vibration absorption is achieved, but wear occurs in parts subject to vibration and detuning may occur
Solution Approach 1:
The absorber mass and spring elements are merged into a single integrated structural unit with the rotating component, eliminating separate leaf springs that would be subject to wear. The integration ensures that no separate mounting elements experience wear from vibration while maintaining the vibration absorption function throughout the service life.
3Ease of manufacture
If additional spring elements and mounting components are used, then absorber mass can be mounted, but assembly effort increases and installation space is required
Solution Approach 1:
The absorber mass is integrated directly into the rotating component as a single structural unit, eliminating the need for additional spring elements and mounting components. This integration dramatically reduces assembly effort and the number of parts that would otherwise be required, while the torsion spring rod provides the necessary elastic connection within the integrated structure.
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 provides a wear-resistant, efficient absorption of torsional vibrations without detuning, ensuring precise alignment and extended system lifespan by integrating the absorber mass directly into the component, reducing assembly effort and avoiding play in bearing elements.
Implementation Method 1
the absorber mass is connected to the component only via a torsion element that is firmly connected to the component or is fixed to the component
Implementation Method 2
the torsion element being formed by a torsion spring rod
Implementation Method 3
a radial aligned web serves as a bending spring element
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The device comprises vibration damper that is rotated with drive system component. The damping mass components (7) are connected to flywheel (10) or spring element (9) through torsion-spring bar. The damping mass component is connected to rotating component through torsion-spring bar.