Vacuum Interrupter Bellows Guide Gas Discharge
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Solution Overview
Problem
Existing vacuum interrupters face issues with incomplete air discharge during fast breaking operations due to rapid gas expansion and limited space in the bellows guide groove, leading to potential vibration and reduced breaking speed.
Innovation Solution
The design includes a flange-type bellows guide with multiple side holes and a fixing member featuring additional cutouts and a flange for increased contact area, allowing for stable positioning and enhanced gas discharge through multiple pathways, preventing rotation and ensuring efficient air evacuation during breaking operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single groove is used for gas discharge in the bellows guide, then the structure is simple, but the gas outflow rate is insufficient during fast breaking operations
Solution Approach 1:
The single groove is segmented into multiple grooves (first groove, second groove, third groove) arranged in different directions around the bellows guide. This segmentation increases the total gas discharge area and enables multi-directional gas flow, significantly improving the gas outflow rate during fast breaking operations while maintaining a relatively simple structural design.
2Reliability
If the bellows guide groove has limited space, then the structure is compact, but the gas discharge completeness is reduced during fast breaking
Solution Approach 1:
The gas discharge grooves are arranged in multiple dimensions and directions (radial and axial directions) within the limited bellows guide space. This multi-dimensional arrangement maximizes the use of available space, creates multiple gas ejection pathways, and ensures complete gas discharge even during fast breaking operations without increasing the overall volume of the bellows guide.
3Productivity
If multiple grooves are added for gas discharge, then the gas outflow rate increases, but the manufacturing complexity increases
Solution Approach 1:
Multiple gas discharge grooves are merged into a single integrated bellows guide structure rather than being separate components. This merging approach enables multi-directional gas discharge with enhanced outflow rate while maintaining ease of manufacture, as the grooves are formed as part of the same structural element that can be fabricated in one piece.
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 increases the gas outflow rate per unit time, preventing vibrations and maintaining high breaking speed performance by ensuring stable and complete air discharge from the bellows, thus enhancing the operational reliability of the vacuum interrupter.
Implementation Method 1
a second side hole communicating with the plurality of first side holes is formed in the bellows guide fixing member to allow air inside the bellows to be discharged to the outside
Data Source
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AI summary
The present disclosure relates to a vacuum interrupter, and particularly, to a vacuum interrupter having enhanced performance of discharging air from the interior of a bellows in a breaking operation. The vacuum interrupter includes: a container (10) formed of an insulating material; a fixed portion end plate (15) coupled to an upper portion of the container; a movable portion end plate (20) coupled to a lower end portion of the container and having an opening hole (21) formed in a central portion thereof; a movable electrode (30) inserted into the opening hole and configured to be moved up and down; a bellows (40) having one end installed in the movable portion end plate and one end installed in the movable electrode within the container such that the interior of the container is maintained in a vacuum state even though the movable electrode moves; a bellows guide (50) formed as a flange type tube body and having a flange portion (51) coupled to the movable portion end plate and a body portion (56) inserted into the opening hole and assist the movable electrode to make a linear movement; and a bellows guide fixing member (60) formed as a tube body and coupled to a lower portion of the movable portion end plate to surround the flange portion, wherein a plurality of first side holes (52) are formed in the flange portion, and a second side hole (63) communicating with the plurality of first side holes is formed in the bellows guide fixing member to allow air inside the bellows to be discharged to the outside.