Shaft Coupling with Hub-Mounted Dynamic Vibration Absorber
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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 includes an inertial body, a mounting member, and elastic members, allowing for enhanced 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 the vibration absorption performance is improved, but the 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 are separated by a rotation transmission portion, and the dynamic vibration absorber is mounted on an uninvolved section that does not participate in torque transmission. This segmentation allows vibration absorption functions to be added without compromising the torsional stiffness of the main torque transmission path.
Solution Approach 2:
A dynamic vibration absorber is introduced as an intermediary system mounted on an uninvolved section of the drive hub or driven hub. This absorber includes an inertial body, mounting member, and elastic member that work together to absorb vibrations without interfering with the torsional connection between drive and driven shafts, thus maintaining torsional stiffness while improving vibration absorption.
2Object-affected harmful factors
If a dynamic vibration absorber is mounted on the uninvolved section of the hub, then the vibration absorption performance is enhanced while maintaining torsional stiffness, but the device complexity increases
Solution Approach 1:
The dynamic vibration absorber components (inertial body, mounting member, and elastic member) are integrated into a unified assembly that is mounted on the uninvolved section of the hub. This merging of components into a compact absorber unit adds the vibration absorption function without proportionally increasing overall device complexity, as the components work together in a coordinated manner on a dedicated section.
Solution Approach 2:
The dynamic vibration absorber is mounted on an uninvolved section of the hub that is spatially separated from the main torque transmission path. By utilizing this additional spatial dimension or uninvolved section, the vibration absorption function is added without interfering with the existing torsional connection structure, 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
The solution effectively improves vibration absorption performance while preserving torsional stiffness, offering improved robustness and response to changes in driving conditions.
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
The inertial body, the mounting member, and the elastic member are arranged in a non-contact manner with respect to the drive shaft and the driven shaft
Data Source
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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.