一種負荷開關分閘脫扣機構優化設計
劉其峰
(施耐德電氣(中國)有限公司，北京 100176)
摘 要：負荷開關在分閘過程中，需要機構產生足夠的分閘速度完成開關分閘，此部分能量由壓縮后的彈簧提供，在此過程中，由分閘脫扣摯子鎖止分閘機構，避免彈簧能量過早釋放。通過對分閘機構運動過程的分析，得出影響分閘性能的三個主要功能尺寸，通過嚴謹的尺寸鏈分析，優化設計了一種分閘脫扣機構，并通過運動仿真分析，對優化后的結構進行強度研究。優化后的機構既能確保機構的彈簧儲能過程可靠完成，又能保證脫扣過程中分閘脫扣摯子及時打開，并避免出現分閘脫扣摯子的回彈過快，阻礙機構分閘。經機械壽命測試證明了方案的可靠性。
關鍵詞： 負荷開關；分閘速度；分閘脫扣摯子；尺寸鏈分析
中圖分類號：TM564.2 文獻標識碼：A 文章編號：1007-3175(2023)01-0055-04
An Optimized Design of Opening and Tripping
Structure of a Load Switch
LIU Qi-feng
（Schneider Electric Co., Ltd, Beijing 100176, China）
Abstract: The load switch requires enough speed to complete its opening and closing, and the parts of energy for its speed is provided by the compressed spring. To avoid the premature release of energy, an opening and tripping switch is used to lock the separating brake structure. The paper obtains three main functional dimensions which affect the analytical performance through analyzing the movement of the separating brake structure. A type of separating brake tripping structure is optimized by rigorous dimension chain analysis. Then, the strength analysis of the optimized structure is carried out by simulated study of its movement. The optimized structure not only ensures the reliable completion of the spring energy storage and timely opening of the opening and tripping switch during the process of tripping, but also avoids the overquick rebound of the opening and tripping switch to stop the structure opening. The reliability of this structure is proved by the mechanical life test.
Key words: load switch; opening and tripping speed; opening and tripping switch; dimension chain analysis
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