Multidirectional Dynamic Vibration Absorber With Tunable Movable Mass
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Solution Overview
Problem
Existing dynamic vibration absorbers are complex to manufacture and tune, require significant installation space due to the need for multiple absorbers to handle multidirectional vibrations, and are limited to absorbing vibrations in one direction.
Innovation Solution
A dynamic vibration absorber design comprising a first and second support part with a movable mass connected through cylindrical portions made of different materials, damping layers, and adjustable connecting elements to achieve multi-directional vibration absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple dynamic vibration absorbers are used to absorb multidirectional vibrations, then vibration absorption capability is improved, but installation space requirement increases
Solution Approach 1:
The patent combines multiple vibration absorption functions into a single integrated device. The dynamic vibration absorber is designed with a movable mass that can oscillate in multiple directions (at least two perpendicular directions) within a unified structure, eliminating the need for separate absorbers for different vibration directions. This merging approach maintains comprehensive vibration absorption capability while significantly reducing the total installation space required.
Solution Approach 2:
The invention creates a universal vibration absorber that can handle multidirectional vibrations through a single device. The movable mass is configured to respond to vibrations from multiple directions simultaneously, making the absorber adaptable to various vibration scenarios without requiring direction-specific components. This multi-functionality resolves the contradiction by providing comprehensive protection in a compact form factor.
2Area of stationary object
If a dynamic vibration absorber is designed for compact size, then installation space is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent employs segmentation by dividing the vibration absorber into modular components: a support structure, a movable mass, and connecting elements. These segmented parts can be manufactured separately using standard processes and then assembled into the compact final device. This segmentation reduces manufacturing complexity while achieving the desired compact size, as each component can be produced independently with simpler tooling and procedures.
3Adaptability or versatility
If the elasticity modulus of cylindrical portions is reduced, then vibration absorption effectiveness is improved, but structural strength decreases
Solution Approach 1:
The patent applies local quality by using materials with different elasticity moduli in different parts of the device. The cylindrical portions that directly interact with the movable mass use materials with lower elasticity modulus to enhance vibration absorption, while other structural components maintain higher strength materials. This localized material selection allows the system to achieve effective vibration absorption in critical areas without compromising the overall structural integrity.
Solution Approach 2:
The invention utilizes composite material construction, particularly in the cylindrical portions where materials with specific elasticity characteristics are selected to optimize vibration absorption. By carefully choosing material properties for different components and potentially using composite structures, the device achieves the desired balance between softness for vibration damping and overall structural strength, resolving the contradiction between absorption effectiveness and structural integrity.
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 design allows for efficient absorption of vibrations in multiple directions with adjustable frequencies, reducing manufacturing complexity and installation space requirements.
Implementation Method 1
uses the inertia force of the mass M in order to reduce the vibration
Implementation Method 2
reduces the vibration in question by use of vibrating with an opposite phase to the vibration in question
Implementation Method 3
a spring and a mass having a characteristic frequency which is the same as the frequency of a vibration in question
Implementation Method 4
a first damping layer inserted between the first cylindrical portion and the first movable mass, and a second damping layer inserted between the second cylindrical portion and the first movable mass
Data Source
AI summary
Provided is a dynamic vibration absorber that includes a first support part, a second support part separated from the first support part by a first gap, and at least a first vibration absorber module, the first vibration absorber module includes a first surface of the first support part, a first surface of the second support part, and a first vibration absorber cylinder connecting the first surface of the first support part and the first surface of the second support part, the first vibration absorber cylinder includes a first cylindrical portion and at least a first movable mass, the first movable mass being connected to the first cylindrical portion to vibrate at a predetermined frequency.