Mechanical Linkage Circuit Breaker Pull Rod Stability
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Solution Overview
Problem
Existing mechanical linkage circuit breakers face instability and deformation issues due to the long distance between phases, affecting the reliability and stability of the pull rod, which compromises the mechanical properties and performance of the circuit breaker.
Innovation Solution
A mechanical linkage circuit breaker design incorporating a guiding means with load-bearing elements and rotatable guide sleeves made of Teflon, strategically positioned to prevent deformation and reduce friction, ensuring stability and reliability while maintaining the pull rod's shape and material integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between phases is increased, then the electrical insulation performance is improved, but the pull rod becomes excessively long and unstable
Solution Approach 1:
The patent introduces guide sleeves as intermediary components between the pull rod and the phase structure. These guide sleeves provide lateral support and guidance to the pull rod, preventing excessive deflection and instability while allowing the necessary electrical clearance to be maintained. The guide sleeves act as mediators that enable both the electrical insulation requirement and the mechanical stability requirement to be satisfied simultaneously.
2Length of stationary object
If the pull rod length is increased to accommodate larger phase distance, then the electrical clearance is improved, but the pull rod deformation increases
Solution Approach 1:
The patent applies local quality by providing lateral support only at specific locations where guide sleeves are positioned, rather than uniformly supporting the entire pull rod length. This localized support structure maintains the necessary electrical clearance while providing sufficient mechanical support to prevent excessive deformation. The guide sleeves create localized support zones that maintain pull rod shape stability without compromising the overall phase distance.
3Stability of the object's composition
If guide sleeves are positioned close to the pull rod, then the guidance effect is improved, but the friction and wear increase
Solution Approach 1:
The patent applies partial action by positioning guide sleeves at critical locations along the pull rod rather than continuously along its entire length. The guide sleeves are spaced at intervals where they provide sufficient guidance stability to prevent pull rod instability, while the gaps between guide sleeves reduce the total friction contact area and minimize material wear. This selective positioning achieves the necessary guidance effect with reduced wear.
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 prevents deformation and destabilization of the pull rod, reduces wear, and enhances the mechanical linkage circuit breaker's reliability and stability, while being cost-effective and easy to install, avoiding operational issues like jamming.
Implementation Method 1
two guide sleeves made of Teflon... reduce friction caused by relative movement between the guide sleeves and the pull rod
Data Source
Figure 1~2
Figure 3
AI summary
The present invention relates to a mechanical linkage circuit breaker, comprising a crossbeam and a pull rod, wherein the pull rod is disposed in the crossbeam. The mechanical linkage circuit breaker also comprises a guiding means. The guiding means comprises two load-bearing elements and two guide sleeves, wherein the load-bearing elements are fixed to the crossbeam and located on two sides of the pull rod. The guide sleeves surround the load-bearing elements, respectively, in a rotatable fashion and are spaced apart from the pull rod. Such a mechanical linkage circuit breaker has high reliability and stability.