HVDC Relay Drive Structure for Easier Assembly and Arc Isolation
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Solution Overview
Problem
The assembly of high-voltage direct-current relays is difficult due to the tendency of the movable spring piece and main spring to deviate and fall off during assembly, and the metal U-shaped basket fails to extinguish reverse arcs, leading to reduced relay life.
Innovation Solution
A drive structure comprising a retaining frame, stopper piece, movable spring piece, and elastic member, with the elastic member and movable spring piece stacked between retaining side arms, and the stopper piece equipped with an arc isolation portion to prevent arcs, facilitating easy assembly and improving relay life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the U-shaped basket is used to accommodate the movable spring piece and main spring, then the assembly structure is compact, but the assembly process becomes difficult due to deviation and falling off of components
Solution Approach 1:
The invention divides the original single U-shaped basket structure into multiple segmented components: the movable spring piece, the main spring, and the stopper piece are separated and positioned in distinct locations within the housing. This segmentation allows each component to be assembled independently through the sealing plate, eliminating the complexity of fitting components into a confined U-shaped basket space.
Solution Approach 2:
The sealing plate serves as an intermediary component that provides assembly holes for inserting the movable spring piece and main spring. This intermediary structure mediates between the housing and the spring components, enabling easy access for assembly and disassembly without requiring complex manipulation within the U-shaped basket.
2Strength
If the U-shaped basket is made of metal material, then the structural strength is sufficient, but the reverse arc cannot be extinguished leading to relay burnout
Solution Approach 1:
The invention extracts the arc extinction function from the metal U-shaped basket structure and assigns it to a dedicated arc isolation portion. The stopper piece is positioned to physically isolate and contain the arc between the fixed contact and movable contact, separating the structural support function (performed by the housing) from the arc extinction function (performed by the stopper piece geometry).
Solution Approach 2:
The invention converts the potentially harmful reverse arc into a controlled phenomenon by designing the stopper piece to create an arc isolation space. The arc, instead of causing burnout, is contained within a defined region where it can dissipate safely, transforming the harmful effect into a controlled process that actually protects the relay components.
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 drive structure enables simple and efficient assembly of high-voltage direct-current relays and effectively isolates arcs, thereby enhancing the service life by preventing reverse arc damage.
Implementation Method 1
one end of the elastic member presses against the support plate, the other end of the elastic member presses against the movable spring piece
Implementation Method 2
the elastic member is a compression spring
Implementation Method 3
The stopper piece is provided with an arc isolation portion, the arc isolation portion is configured for isolating arcs
Data Source
AI summary
Provided is a drive structure for a high-voltage direct-current relay, the drive structure comprising: a retaining frame, a stopper piece, a movable spring piece, and an elastic member. The retaining frame comprises two retaining side arms, a support plate, and a drive rod. The two retaining side arms are disposed at two sides of the support plate, and the drive rod is connected to a bottom portion of the support plate. The stopper piece has one end connected to a terminal end of one of the retaining side arms, and the other end connected to a terminal end of the other retaining side arm. The elastic member has one end pressing against the support plate and the other end pressing against the movable spring piece, the movable spring piece presses against the stopper piece, and the stopper piece is provided with an arc isolation portion. The drive structure for a high-voltage direct-current relay has an bottom-up assembly manner, in which the elastic member, the movable spring piece, and the stopper piece are stacked sequentially, and the stopper piece is connected to and retained by the two retaining side arms, thereby realizing a simple and fast assembly process, and increasing assembly efficiency of high-voltage direct-current relays. In addition, the arc isolation portion has an effect of isolating arcs, thereby improving a service life of high-voltage direct-current relays despite reverse arcs.