Overhead Line Damper Regulates Weight Rotation Angle
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Solution Overview
Problem
Existing overhead line dampers lack a defined rotation angle to effectively inhibit lift forces caused by wind, leading to potential twisting and breaking due to snow accumulation.
Innovation Solution
An overhead line damper with a clamping mechanism and rotary member, where the rotation range of the weight is regulated between ±20 degrees to ±40 degrees to counteract wind-induced lift forces, utilizing a pair of hinge pieces and connection parts to control the rotation angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stoppers are provided to stop rotation at predetermined angles, then rotation can be limited, but the effective rotation angle to suppress galloping is not defined
Solution Approach 1:
The patent applies parameter changes by specifying a concrete rotation angle range (±20 to ±40 degrees) for the stoppers instead of leaving it undefined. This transforms the vague parameter of rotation angle into a specific, optimized range that effectively suppresses galloping while preventing twisting, resolving the contradiction between reliability and ease of operation.
2Stability of the object's composition
If the rotation angle is limited to prevent twisting, then line stability is improved, but the ability to shed snow is reduced
Solution Approach 1:
The patent optimizes the rotation angle parameter to a specific range (±20 to ±40 degrees) that simultaneously achieves two opposing goals: it limits rotation enough to maintain line stability and prevent twisting, while allowing sufficient rotation to enable snow shedding. This parameter optimization resolves the contradiction between stability and productivity.
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
Effectively suppresses lift forces and twisting of overhead lines by ensuring the weight rotates within a controlled angle range, thereby preventing excessive snow accumulation and maintaining line stability.
Implementation Method 1
inhibit a lift force which the overhead line receives due to wind or the like by making the snow accretion shape of the snow accreting on the overhead line uneven
Implementation Method 2
the connection part regulates rotation of the weight by abutting on the opening end surfaces
Implementation Method 3
a clamping mechanism that is fitted to an outer circumferential surface of the overhead line
Data Source
AI summary
An overhead line damper capable of suppressing a lift force that an overhead line receives due to wind is provided. A damper 1 for an overhead line that is provided at an overhead line L2 includes a clamping mechanism (a pair of hinge pieces 21a and 21b) that is fitted to an outer circumferential surface of the overhead line L2, and a rotary member 4 with a lower part attached to weights 3a and 3b, and an upper part rotatably attached to the clamping mechanism, and the clamping mechanism has a regulation part (an opening part 24) that regulates a rotation range of the rotary member 4 so that the weights 3a and 3b rotate within an angle range from ±20 degrees to ±40 degrees inclusive in a vertical direction.