Vacuum Interrupt Chamber Pole Part Compensation Ring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for producing pole parts of medium-voltage switching devices, particularly through injection molding, result in high mold internal pressures that can lead to deformation and costly reinforcement needs for vacuum interrupt chambers, as the forces exerted during encapsulation can damage the chambers without adequate protection.
Innovation Solution
A compensation ring is positioned between the vacuum interrupt chamber's lower cover and the mold core before encapsulation, which remains in the encapsulation to absorb and dissipate axial forces, reducing the load on the chamber and eliminating the need for costly pressure reinforcements on the switching contact side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If injection molding process is used for encapsulation, then productivity and manufacturing simplicity are improved, but mold internal pressures cause deformation and damage to vacuum interrupt chambers
Solution Approach 1:
A compensation ring is positioned between the vacuum interrupt chamber and the mold core before the encapsulation process begins. This ring acts as a cushioning element that absorbs and distributes the axial forces generated during injection molding, preventing direct transmission of high mold internal pressures to the vacuum interrupt chamber covers, thereby avoiding deformation and damage while maintaining the productivity benefits of injection molding
2Strength
If reinforcement measures are applied to vacuum interrupt chamber, then strength and reliability are improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The compensation ring serves as an intermediary element between the mold core and the vacuum interrupt chamber. Instead of reinforcing the chamber itself with complex structures like wall-thickness inserts, external caps, or shaped ceramic parts, the compensation ring mediates the force transmission, distributing axial loads evenly across the chamber surface and eliminating the need for costly reinforcement measures while maintaining chamber integrity
Data Source
AI summary
A method for production of a pole part of a medium-voltage switching device, and a pole part are provided. To obviate costly pressure reinforcements at least on the switching contact side of the vacuum interrupt chamber in the area of the mold core, while also achieving an optimum injection-molded result, a compensation ring is positioned, before the encapsulation process, as a separate injection-molded seal on or close to the external circumferential line of a vacuum interrupt chamber cover, between the lower cover of the vacuum interrupt chamber and the mold core. The positioned compensation ring is also encapsulated so as to remain in the encapsulation, and the mold core is then removed.