Rotating Machine Part Vibration Absorber Design
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Solution Overview
Problem
Rotating machine parts, such as shafts and rollers, experience resonance-like vibrations due to their low natural bending frequencies and lack of material damping, which negatively affect functionality, productivity, and accuracy in machines like textile and printing machines.
Innovation Solution
A damped vibration absorber device is introduced into the rotating machine part with a concentric cavity, featuring a centrally arranged additional mass and an elastic damping layer between the mass and the cavity's inner surface, allowing for optimization of vibration reduction through adjustable outer circumference and compressive stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a damped vibration absorber device is introduced into a rotating machine part, then vibration reduction is achieved, but the structural complexity increases
Solution Approach 1:
The vibration absorber device is nested within the hollow rotating machine part. The additional mass is positioned inside the hollow cavity, and the elastic damping layer is arranged between the additional mass and the inner surface of the machine part, creating a compact nested structure that reduces vibration without requiring external components
Solution Approach 2:
The vibration absorber device is integrated into the rotating machine part by combining multiple functional elements (additional mass, elastic damping layer, concentric arrangement) into a single unified structure that serves both as a vibration absorber and as part of the machine's rotating assembly
2Stability of the object's composition
If the additional mass is centrally arranged with concentric elastic damping layer, then compact and stable design is achieved, but the manufacturing complexity increases
Solution Approach 1:
The elastic damping layer is positioned specifically at the interface between the additional mass and the machine part's inner surface, providing localized damping where it is most needed. The concentric arrangement ensures uniform distribution of damping properties in radial directions, achieving stable vibration reduction characteristics
Solution Approach 2:
The vibration absorber device is divided into separate components (additional mass, elastic damping layer, mounting structure) that can be manufactured independently and then assembled, simplifying the manufacturing process while maintaining the compact concentric design
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 results in a compact, stable design that effectively reduces vibrations across a specific frequency range, enhancing the machine's operational stability and ease of installation.
Implementation Method 1
an elastic damping layer which is concentric between the additional mass and the inner surface of the machine part delimiting the cavity is arranged
Implementation Method 2
damped vibration absorber device consisting of an additional mass and an additional spring/damping system
Data Source
Figure 1a~1b
Figure 2~3
Figure 4~5C
AI summary
The steamed damper has an auxiliary oscillator fixed at or in the main system. The mass, rigidity and damping coefficient of the auxiliary oscillator are so optimized that the oscillations of the main system are as small as possible. The damper has elastic and damping layer (10) outside the auxiliary mass (12).