Electromagnetic Contactor Sliding Guide Wear
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Solution Overview
Problem
The existing electromagnetic contactors experience rotational oscillation of the movable contact, leading to deviation in the opposing relationship between movable and fixed contact portions, resulting in sliding wear and potential conduction failure due to insulating debris generated from ceramic or plastic receptacles.
Innovation Solution
Incorporating metal sliding guides with spring properties, positioned on either side of the movable contact, to regulate turning displacement and prevent wear debris generation, ensuring conductive debris does not interfere with contact portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the movable contact is supported by a shaft-shaped movable support body, then the movable contact can move back and forth to open and close the current path, but the movable contact is liable to oscillate in the direction of rotation around the axis of the movable shaft
Solution Approach 1:
The patent introduces sliding guides as intermediary components between the movable contact and the housing receptacle. These sliding guides constrain the movable contact's motion, preventing rotational oscillation while allowing linear movement for opening and closing the current path. The sliding guides act as mediators that guide and stabilize the movable contact's movement.
2Stability of the object's composition
If the movable contact slides against the housing receptacle to regulate oscillation, then rotational displacement is controlled, but sliding wear occurs and wear debris is generated from the insulating material
Solution Approach 1:
The sliding guides serve as intermediary components that take over the wear function from the housing receptacle. By introducing these dedicated guiding elements, the patent concentrates wear on the sliding guides rather than allowing direct sliding between the movable contact and the insulating housing, thereby reducing harmful wear debris generation.
Solution Approach 2:
The sliding guides are designed as sacrificial components that can wear and be replaced. By making these guiding elements replaceable, the patent allows the main housing receptacle to remain intact and functional, extending the overall device life while the sliding guides serve as consumable wear components.
3Object-affected harmful factors
If wear debris infiltrates between the contact portions, then the insulating debris causes conduction failure, but the sealed receptacle prevents external contamination
Solution Approach 1:
The patent extracts the wear function from the sealed housing system by introducing separate sliding guide components. This allows the housing receptacle to maintain its sealed, contamination-free environment while the sliding guides handle the wear and potential debris generation outside the critical contact area.
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 metal sliding guides effectively suppress wear debris generation and conduction failure, enhancing the reliability of opening and closing the current path by maintaining contact integrity.
Implementation Method 1
sliding wear occurs between the movable contact and one portion of the sealed receptacle
Implementation Method 2
two end portions in an extending direction of the sliding guide formed from a material having spring properties supported by the housing receptacle
Implementation Method 3
an electromagnet unit drives the movable support body to move back and forth to cause the movable contact portions to contact to and separate from the fixed contact portions
Data Source
AI summary
An electromagnetic contactor includes a pair of fixed contact portions having a predetermined distance from each other; a movable contact including a pair of movable contact portions disposed facing the pair of fixed contact portions; a movable support body supporting a central portion of the movable contact in an extending direction of the movable contact; a housing receptacle formed from a non-conductive body, housing at least the pair of fixed contact portions and the movable contact; an electromagnet unit causing the movable support body to move back and forth to cause the movable contact portions to contact to and separate from the fixed contact portions; and sliding guides extending along a moving direction of the movable contact for moving the movable contact back and forth in the housing receptacle to regulate a turning displacement of the movable contact. The sliding guides are different from the housing receptacle.