Rotary Vibration Damper Centrifugal Pendulum Mass Adaptation
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Solution Overview
Problem
Existing rotary vibration dampers face challenges in adapting the mass of centrifugal force pendulum components to varying resonance conditions and require compact designs for congested installation spaces, such as in hydrodynamic torque converters and dual mass flywheels, while maintaining effective vibration compensation.
Innovation Solution
The rotary vibration damper incorporates auxiliary mass parts in the flange part's cutouts, allowing for increased mass without expanding the working diameter, and features recesses for energy accumulators and riveting to facilitate assembly in tight spaces, enabling flexible mass adaptation and reduced axial assembly space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mass of the centrifugal force pendulum is increased to improve vibration compensation, then the vibration absorption capability is improved, but the working diameter and axial assembly space increase
Solution Approach 1:
The patent utilizes the axial dimension by placing auxiliary mass parts in cutouts of the flange part, allowing mass increase without increasing the working diameter. This dimensional transition enables the centrifugal force pendulum to achieve greater mass while maintaining a compact radial footprint, directly resolving the contradiction between vibration compensation capability and working diameter.
Solution Approach 2:
The auxiliary mass parts are nested within the flange part structure through cutouts, effectively utilizing the existing structural space. This nesting approach allows the centrifugal force pendulum to incorporate additional mass without requiring external expansion of the working diameter or excessive increase in axial assembly space.
2Reliability
If the mass of the centrifugal force pendulum is increased to improve vibration compensation, then the vibration absorption capability is improved, but the axial assembly space increases
Solution Approach 1:
The patent transitions from radial mass distribution to axial mass distribution by placing auxiliary mass parts in the axial direction within flange part cutouts. This allows the centrifugal force pendulum to increase mass without proportionally increasing axial assembly space, as the mass is distributed more efficiently within the existing axial envelope.
Solution Approach 2:
The auxiliary mass parts are strategically positioned in specific cutouts of the flange part where they can contribute to vibration compensation without uniformly increasing axial assembly space throughout the entire structure. This localized mass placement optimizes the mass-to-space ratio.
3Volume of moving object
If the design is compacted to reduce assembly space for congested installation conditions, then the assembly space is reduced, but the mass of the centrifugal force pendulum is restricted
Solution Approach 1:
The patent employs axial distribution of mass through flange part cutouts rather than radial distribution, enabling compact radial dimensions while maintaining sufficient centrifugal force pendulum mass. This dimensional strategy allows compact design without sacrificing vibration compensation capability.
Solution Approach 2:
The auxiliary mass parts are integrated with the flange part structure, merging the mass provision function with the existing structural component. This consolidation achieves compact design by eliminating separate mass components while maintaining the required centrifugal force pendulum mass for vibration compensation.
4Reliability
If auxiliary mass parts are added to increase centrifugal force pendulum mass, then the vibration absorption is improved, but the device complexity increases
Solution Approach 1:
The auxiliary mass parts are merged with the flange part through integration in cutouts, combining multiple functions (mass provision, structural support, space utilization) into a single integrated component. This reduces device complexity by eliminating the need for separate mounting structures and reducing the number of discrete parts.
Solution Approach 2:
The flange part serves multiple functions: it provides structural support, defines the working diameter, and incorporates cutouts for auxiliary mass parts. This multi-functionality reduces overall device complexity by having a single component perform multiple roles rather than requiring separate specialized components.
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 enhances the mass fraction of the centrifugal force pendulum, improves vibration absorption, and simplifies assembly by allowing for riveting and punch-through features, effectively addressing the need for compact and adaptable vibration damping in constrained environments.
Implementation Method 1
a rotary vibration damper with a centrifugal force pendulum in which the centrifugal force pendulum is integrated in a flange part of the rotary vibration damper
Data Source
AI summary
A rotary vibration damper with an input part and an output part having a centrifugal force pendulum disposed on a flange part of the input part or output part, with several mass parts distributed over the circumference of the flange part, and disposed on two sides of the flange part, in raceways of the flange part, and limitedly displaceable in the circumferential direction, and in the radial direction by which two mass parts are interconnected respectively on opposite sides of the flange part.