Vibration Damper Pendulum Mass Ratios
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Solution Overview
Problem
Existing vibration dampers with elastic elements and centrifugal force pendulums do not consistently achieve adequate isolation or elimination of vibrations, necessitating criteria for optimal dimensioning.
Innovation Solution
Specifying mass and volume ratios between pendulum masses and elastic elements within specific ranges (0.5 to 4 and 0.3 to 1.3, respectively) to enhance vibration damping efficiency, with preferred ranges of 0.95 to 1.60 and 0.44 to 0.63 for effective torsional vibration isolation and elimination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If arbitrary combinations of elastic elements and pendulum masses are used, then the vibration damper can be constructed, but adequate isolation or elimination of vibrations cannot be achieved
Solution Approach 1:
The patent applies parameter changes by establishing specific ratio ranges for pendulum mass to elastic element mass (0.5 to 4.0, preferably 0.95 to 1.60) and pendulum mass volume to elastic element volume (0.3 to 1.3, preferably 0.44 to 0.63). These parameter specifications transform the arbitrary design approach into a systematic method that ensures effective vibration isolation while simplifying the dimensioning process.
2Reliability
If the mass of pendulum masses is increased to improve vibration elimination, then the effectiveness against torsional vibrations improves, but the mass distribution and space requirements become unbalanced
Solution Approach 1:
The patent resolves this contradiction by introducing dual ratio parameters: mass ratio (0.5 to 4.0) and volume ratio (0.3 to 1.3). This allows designers to optimize both mass distribution for vibration elimination and space utilization simultaneously, ensuring that increased pendulum mass does not lead to disproportionate space requirements.
Solution Approach 2:
The patent employs composite design by combining pendulum masses with specific density characteristics relative to elastic elements. The volume-to-mass ratio relationship enables the use of materials with optimized density properties, creating a composite system that achieves effective vibration elimination within compact spatial constraints.
3Reliability
If the volume of elastic elements is increased to improve torsional vibration isolation, then the isolation effectiveness improves, but the space occupied by elastic elements increases
Solution Approach 1:
The patent addresses this contradiction through the volume ratio parameter (pendulum mass volume to elastic element volume: 0.3 to 1.3). This parameter enables optimization of elastic element volume for maximum isolation effectiveness while preventing excessive space occupation, as the ratio constrains the elastic element volume relative to the pendulum mass volume.
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
These ratios enable the design of high-quality vibration dampers that efficiently isolate and eliminate torsional vibrations, improving the overall damping properties by ensuring optimal mass and volume distributions in the vibration damper components.
Implementation Method 1
one or more elastic elements for transmitting force between the input side and the output side
Implementation Method 2
a centrifugal force pendulum having a pendulum flange and one or more pendulum masses which are attached movably to the pendulum flange in the plane of rotation of the pendulum flange
Data Source
AI summary
A vibration damper includes an input side and output side, one or more elastic elements for transmitting force between the input side and the output side, and a centrifugal force pendulum having a pendulum flange and one or more pendulum masses which are attached movably to the pendulum flange in the plane of rotation of the pendulum flange. It is proposed that certain ratios of masses and volumes of the elastic elements and of the pendulum masses be formed. If one or more of the ratios lie in specified ranges, then good damping or elimination of torsional vibrations by the vibration damper can be assumed.