一種萬能式斷路器操作機(jī)構(gòu)失效問題的分析與改善
王宇翔，袁波，陸俊謙，令狐紹江，袁輝
(浙江天正智能電器有限公司，浙江 嘉興 314000)
摘 要：介紹了殼架電流 6 300 A 的萬能式斷路器在進(jìn)行機(jī)械壽命試驗(yàn)過程中出現(xiàn)的一種失效問題，其具體表現(xiàn)為斷路器操作機(jī)構(gòu)的儲(chǔ)能杠桿限位軸受力彎曲變形或側(cè)板上安裝限位軸的圓孔變形導(dǎo)致限位軸脫出，即“空合”。分析了導(dǎo)致該問題的原因及運(yùn)動(dòng)過程中機(jī)構(gòu)部分零部件的受力情況，提出了優(yōu)化方案并進(jìn)行機(jī)械壽命試驗(yàn)的驗(yàn)證，避免了機(jī)構(gòu)再次出現(xiàn)“空合”的情況，提高了產(chǎn)品的機(jī)械壽命。
關(guān)鍵詞： 斷路器；操作機(jī)構(gòu)；空合；機(jī)械壽命；沖擊載荷；彎曲變形
中圖分類號(hào)：TM561 文獻(xiàn)標(biāo)識(shí)碼：B 文章編號(hào)：1007-3175(2022)08-0048-05
Analysis and Improvement of Operating Mechanism
Failure Problem of Air Circuit Breaker
WANG Yu-xiang, YUAN Bo, LU Jun-qian, LINGHU Shao-jiang, YUAN Hui
（Zhejiang Tengen Smart Electric Co.,Ltd, Jiaxing 314000, China）
Abstract: This paper introduced a failure problem of the air circuit breaker of rated current 6 300 A, which emerged in the mechanical life test. The specific performance is that the limited axis of the energy storage of the operating mechanism of the air circuit breaker is bending deformation or the limited axis falls out because of the deformation of the circular hole on the side panel. These phemenon are called “cavitation”.This research analyzed the cause of the problem and the stress condition of components and parts in the running process. It proposed an improvement scheme and verified it by the mechanical life test. The result shows that it improves the mechanical life of the air circuit breaker and avoids the situation of “cavitation”.
Key words: circuit breaker; operating mechanism; cavitation; mechanical life; shock load; bending deformation
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