Breaker Tripping Mechanism With Collinear Rod Alignment
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Solution Overview
Problem
The existing tripping mechanism in overcurrent tripping units experiences additional friction and strain due to shifted axis alignment between the tripping rod and leading rod, affecting the breaker's high-speed opening ability and low current tripping capability.
Innovation Solution
A tripping mechanism comprising a magnetic core with yokes, an armature, a leading rod, a spring, and a tripping lever, where the leading rod is fixed within the spring and extends through the yoke holes, allowing for the armature to move between yokes without generating momentum, thus reducing friction and strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the tripping rod axis is shifted by certain distance from the leading rod axis, then the tripping force can be transmitted from above the busbar to below the busbar, but additional friction and strain are created, adversely impacting the breaker high speed opening ability and low current tripping ability
Solution Approach 1:
The patent changes the spatial arrangement from a shifted parallel axis configuration to a collinear configuration where the tripping rod and leading rod share the same axis. This dimensional alignment eliminates the momentum generation that occurs with offset axes, thereby reducing friction and strain while maintaining the force transmission function from above to below the busbar.
Solution Approach 2:
The patent merges the tripping rod and leading rod into a single collinear assembly, where both rods operate along the same axis. This consolidation eliminates the relative offset between the two rods, preventing the generation of harmful momentum and friction while preserving the tripping force transmission pathway through the magnetic core and armature assembly.
2Ease of operation
If the tripping rod and leading rod axes are shifted by certain distance, then the tripping mechanism can function, but additional momentum is created acting on the armature and leading rod, creating additional friction
Solution Approach 1:
The patent aligns the tripping rod and leading rod axes in the same dimensional space (collinear arrangement), eliminating the spatial offset that generates momentum. This alignment ensures that forces act directly along the rod axes without creating rotational moments, thereby minimizing friction between the armature and leading rod while maintaining operational functionality.
3Force
If additional armature stroke is used to compensate for additional strain, then the tripping mechanism can overcome the strain, but the high speed opening ability and low current tripping ability are adversely impacted
Solution Approach 1:
The patent extracts and eliminates the source of additional strain by aligning the rod axes collinearly, preventing momentum generation. This removal of the strain-causing offset allows the armature to achieve tripping force transmission without requiring excessive stroke, thereby preserving high-speed opening capability and low current tripping sensitivity.
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
This configuration enhances the breaker's high-speed opening ability and low current tripping capability by minimizing friction and strain, improving operational efficiency.
Implementation Method 1
The spring is configured to force the armature towards the first yoke
Implementation Method 2
the tripping force produced by the armature assembly
Data Source
AI summary
A tripping mechanism includes a magnetic core with first, second and third yokes, the third yoke comprising a yoke through hole; an armature comprising an armature through hole, a leading rod, a spring and means for tensioning the spring, a tripping lever, means for transferring a movement of the armature, wherein the armature is movably placed between the first yoke and the second yoke, wherein the leading rod extends throughout the magnetic core and the armature and is fixed relative to the magnetic core, wherein the leading rod is placed inside the spring and the spring is placed between the armature and the means for tensioning, wherein the spring is configured to push the armature towards the first yoke.