Inverted Vibration Damper Clamp for Aerial Cable Stability
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Solution Overview
Problem
Existing vibration dampers for aerial cables or conductors with counterweights are unstable during installation due to gravitational moments, making it difficult to secure them correctly, especially at high heights, posing a risk to operators.
Innovation Solution
A clamp system with arched segments and a sleeve mechanism that securely fixes the resilient cable at an inclined angle, guided by notches and anti-vibration washers, ensuring correct positioning and stability during installation, and featuring flange-like shoulders for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the resilient cable and counterweights are arranged above the aerial cable with different moments of inertia, then the vibration damping function is achieved, but the device becomes unstable during installation due to gravitational moments
Solution Approach 1:
The patent inverts the traditional arrangement by positioning the resilient cable and counterweights below the aerial cable instead of above it. This inversion eliminates the gravitational moment that caused instability during installation while maintaining the vibration damping function through the inverted configuration of the damper components.
Solution Approach 2:
The patent employs asymmetric positioning of the sleeve on the resilient cable, placing it at a specific location between the counterweights to create different moments of inertia on either side. This asymmetric arrangement, combined with the inverted configuration, achieves both stability during installation and effective vibration damping operation.
2Stability of the object's composition
If the damper device is securely held during installation, then installation stability is improved, but operator safety risk increases due to the need for manual holding at great heights
Solution Approach 1:
By inverting the damper configuration with components positioned below the aerial cable, the device achieves inherent stability during installation without requiring manual support. This eliminates the safety hazard of operators working at great heights while maintaining proper installation stability.
3Ease of operation
If the resilient cable is fixed on the clamp after clamp installation, then installation flexibility is improved, but positioning precision deteriorates due to potential incorrect placement
Solution Approach 1:
The patent incorporates a pre-formed notch in the clamp that guides the resilient cable into the correct position before final fixation. This preliminary guiding action ensures precise cable positioning while maintaining the flexibility to complete installation in stages, resolving the contradiction between operational ease and positioning precision.
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 allows for easier and safer installation of the damper on aerial cables, preventing instability and ensuring secure attachment, even under mechanical stresses from wind, thereby enhancing operator safety and installation efficiency.
Implementation Method 1
the cable also incorporates means for showing the exact point for fixing on the clamp, formed by the sleeve. This solution is compatible in dampers in which the moment of inertia of the assembly formed by the resilient cable and the counterweights is different at both sides of the sleeve
Implementation Method 2
the damper including a cap closing the top portion of the notch and pressing on the cable to immobilize it
Implementation Method 3
said resilient cable and the counterweights apply a moment on the device which tends to rotate around the cable due to gravity
Data Source
Figure 1
Figure 2~3
AI summary
The present invention relates to a vibration damper for an aerial cable or conductor, comprising a resilient suspension cable with counterweights fixed at its respective ends. The damper comprises a clamp formed by a first arched segment intended to be placed on the upper face of the aerial cable; and at least a second arched segment complementary and securely coupleable to the first segment below the aerial cable for forming, together with the first segment, a ring which tightly clamps the mentioned aerial conductor. In the apex of the outer face of the first segment there is provided a seat for the cable with a notch. The damper includes a cap closing the top portion of the notch and pressing on the cable to immobilize it. The cable has a sleeve between its two counterweights for supporting the cable in the seat of the first segment of the clamp.