Linear Actuating Earthing Switch Space Reduction
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Solution Overview
Problem
Traditional rotary earthing switches occupy excessive space due to their rotational mechanism, making them inefficient in compact structures where space is limited.
Innovation Solution
A linear actuating earthing switch design that uses a sliding carriage on a rail with stored energy elements to provide linear expansion force, allowing for compact operation and efficient use of space by moving contacts in a single axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotary mechanism is used in traditional earthing switches, then the switching function is achieved, but the volumetric space required is excessive
Solution Approach 1:
The patent inverts the traditional rotary motion concept by using linear motion to achieve the same switching function. Instead of rotating switch blades about a fulcrum, the invention uses a sliding carriage that moves linearly along a rail to open and close contacts, thereby achieving the switching function while dramatically reducing the volumetric space required.
Solution Approach 2:
The patent replaces the rotary mechanical system with a linear mechanical system. The traditional rotary mechanism with switch blades swinging about a fulcrum is substituted with a sliding carriage moving along a rail, driven by a linear actuator. This mechanical substitution eliminates the need for rotational space while maintaining the essential switching function.
2Ease of operation
If a rotary mechanism with switch blades and spring actuators is used, then the switching operation is achieved, but the usable space for other purposes becomes impossible
Solution Approach 1:
The patent inverts the traditional approach by using linear motion instead of rotary motion. The sliding carriage moves along a rail in a straight line to achieve switching operations, which eliminates the need for large rotational arcs and allows the surrounding space to be used for other purposes in compact switchgear structures.
Solution Approach 2:
The patent changes the dimensional approach from rotary (requiring two-dimensional arc space) to linear (requiring one-dimensional linear space). By confining the switching operation to a linear path along a rail, the mechanism minimizes its spatial footprint and allows efficient use of space in compact switchgear assemblies.
3Reliability
If traditional rotary earthing switches are used in compact structures, then the switching function is maintained, but the space efficiency becomes poor
Solution Approach 1:
The patent inverts the conventional rotary switching mechanism by employing linear motion. The sliding carriage moves along a rail to open and close contacts, achieving the reliable switching function while dramatically improving space efficiency for use in compact switchgear structures where space is at a premium.
Solution Approach 2:
The patent substitutes the rotary mechanical system with a linear mechanical system. The traditional rotary switch blades and spring actuators are replaced with a sliding carriage on a rail, actuated by a linear actuator. This substitution maintains the switching function's reliability while significantly improving space efficiency.
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 linear actuating earthing switch reduces space requirements, enabling more efficient use of space by nesting components and maintaining necessary clearance, while ensuring reliable operation and compliance with IEC standards through mechanical latching and stored energy mechanisms.
Implementation Method 1
a stored energy element provides a linear expansion force between the top wall and the sliding carriage when the earthing switch is in an open position
Data Source
AI summary
A linear actuating earthing switch configuration that moves movable contacts using linear motion in a single axis. The earthing switch includes a frame with a rail on a slide wall. A sliding carriage slides on the rail in a linear direction, the sliding carriage including a plurality of movable contacts. A stored energy element provides a linear expansion force between the frame and the sliding carriage when the earthing switch is in an open position.