Publication Date:
2018-08-03
Description:
Circuit breaker operating mechanism unit endure alternating stress during divide-shut brake operation, and metal components frequently appear fatigue failure. In the paper, the common failure features of energy storage spring facture, shaft sleeve cracking, energy storage connecting bolt cracking were studied. Depending on this situation, macroscopic examination, metallographic examination, scanning electron microscope were applied. The results indicated that the metal components fatigue failure were mainly caused by bad material and inproper installation. Technical supervision suggestion were also proposed to perfect the construction acceptance and operations management process.
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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