Bobbin Holder Shaft Attenuation Structure for Vibration Suppression
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Solution Overview
Problem
The vibration of long members in machinery, such as the shaft supporting member in a bobbin holder, leads to reduced bearing life and other operational issues.
Innovation Solution
A vibration suppression system comprising a long member and an attenuation member, where the attenuation member includes a fixed portion, a contact portion that moves relative to the long member, and a noncontact portion, generating a large friction force to dissipate energy and suppress vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a long member is used in machinery, then the structural requirements are met, but vibration occurs leading to reduced bearing life
Solution Approach 1:
The patent converts the harmful vibration energy into beneficial frictional heat through the attenuation member. The contact portion of the attenuation member slides along the elongated surface of the long member during vibration, generating friction force that dissipates vibration energy as heat, thereby eliminating the harmful vibration while preserving the long member structure
Solution Approach 2:
The attenuation member serves as an intermediary element between the long member and the vibration source. It is attached to the long member at a fixed portion while having a contact portion that can slide along the elongated surface, acting as a mediator that absorbs and dissipates vibration energy through friction without affecting the primary function of the long member
2Object-affected harmful factors
If the contact portion is made to move relative to the long member to generate friction force, then vibration suppression is achieved, but the structure becomes more complex
Solution Approach 1:
The attenuation member incorporates dynamic characteristics through its contact portion that can slide relative to the long member's elongated surface. This sliding capability allows the contact portion to dynamically respond to vibration movements, maintaining continuous contact and friction force generation while adapting to the vibration amplitude and frequency variations
Solution Approach 2:
The attenuation member is segmented into distinct functional portions: a fixed portion attached to the long member and a contact portion that slides along the elongated surface. This segmentation allows each portion to perform its specific function independently, simplifying the overall design while achieving effective vibration suppression
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 system effectively suppresses the vibration of long members by generating frictional heat, thereby reducing wear and tear on bearings and improving the operational stability of machinery.
Implementation Method 1
a large friction force is generated between the elongated surface of the long member and the contact portion of the attenuation member, energy dissipates as frictional heat
Data Source
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AI summary
An object of the present invention is to provide a vibration suppression system configured to suppress the vibration of a long member. The following members are provided: a shaft supporting member 22 which is long in an axial direction (one direction) and which is bent due to vibration; and an attenuation member 30 used for suppressing the vibration of the shaft supporting member 22 while being attached to the shaft supporting member 22. The attenuation member 30 includes: a fixed portion 32 which is positionally fixed to the shaft supporting member 22 in the axial direction; a contact portion 31 which is positionally different from the fixed portion 32 in the axial direction, which is configured to make contact with and press an inner circumferential surface 22a of the shaft supporting member 22, and which is movable relative to the inner circumferential surface 22a of the shaft supporting member 22 in the axial direction while the attenuation member 30 is attached to the shaft supporting member 22; and a noncontact portion 33 which is positioned between the contact portion 31 and the fixed portion 32 and which does not make contact with the inner circumferential surface 22a of the shaft supporting member 22 while the attenuation member 30 is attached to the shaft supporting member 22.