Shaft Coupling with Dynamic Vibration Absorber for Torsional Stiffness
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Solution Overview
Problem
Conventional shaft couplings face a trade-off between vibration absorption performance and torsional stiffness, as additional vibration absorption means can decrease torsional stiffness.
Innovation Solution
A shaft coupling design that incorporates a dynamic vibration absorber mounted on uninvolved sections of the drive and driven hubs, which are not involved in torsional stiffness, using an inertial body, mounting member, and elastic members to enhance vibration absorption while maintaining torsional stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If leaf springs and elastic members are arranged between the drive hub and the driven hub to enhance vibration absorption performance, then vibration absorption performance is improved, but torsional stiffness of the shaft coupling is decreased
Solution Approach 1:
The shaft coupling is divided into functionally independent sections: the drive hub and driven hub for torsional stiffness transmission, and the dynamically coupled vibration absorber sections mounted on uninvolved sections for vibration absorption. This segmentation allows each section to perform its specific function without interfering with the other, resolving the contradiction between vibration absorption and torsional stiffness maintenance.
Solution Approach 2:
A dynamic vibration absorber is introduced as an intermediary system with its own inertial body and elastic member. This absorber is coupled to the uninvolved section of the hub and acts as a mediator that absorbs vibrations without being part of the primary torsional stiffness transmission path, thereby improving vibration absorption while maintaining torsional stiffness.
2Object-affected harmful factors
If a dynamic vibration absorber is mounted on the uninvolved section of the hub, then vibration absorption performance is enhanced while maintaining torsional stiffness, but the structure becomes more complex
Solution Approach 1:
The dynamic vibration absorber is integrated with the existing hub structure by mounting it on the uninvolved section. The absorber's inertial body, elastic member, and mounting components are combined into a compact assembly that attaches to the hub without requiring separate support structures, thereby reducing the increase in overall system complexity while achieving vibration absorption.
Solution Approach 2:
The uninvolved section of the hub serves dual purposes: it provides structural support for the hub itself and serves as a mounting location for the dynamic vibration absorber. This multi-functional use of the uninvolved section avoids the need for additional dedicated mounting structures, thereby minimizing the increase in device complexity.
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 effectively improves vibration absorption performance while maintaining torsional stiffness, offering enhanced damping and vibration inhibition with a simple structure, and provides robustness against variations in acceleration and deceleration.
Implementation Method 1
at least one elastic member that is arranged between the inertial body and the mounting member to support the inertial body
Implementation Method 2
a dynamic vibration absorber integrally coupled to a section of at least one of the drive hub and the driven hub... the vibration absorption performance is enhanced
Data Source
AI summary
A shaft coupling includes a drive hub that is coupled to a drive shaft to rotate integrally with the drive shaft, a driven hub that is coupled to a driven shaft to rotate integrally with the driven shaft, and a rotation transmission portion that transmits rotation between the drive hub and the driven hub. A dynamic vibration absorber is integrally coupled to a section of at least one of the drive hub and the driven hub. The section is an uninvolved section that is not involved in a torsional stiffness of the whole shaft coupling.