250×400毫米颚式破碎机偏心轴在服役过程中发生断裂,不但造成停机停产,而且还会造成严重事故,因而引起有关生产厂的注意。我们对服役才100多小时的颚式破碎机偏心轴的断裂进行失效分析,目的是找出断裂原因,提出改进措施,从而提高产品的质量和使用寿命。 The eccentric shaft of the 250×400 mm jaw crusher broke during the service process, which not only caused shutdown and production shutdown, but also caused serious accidents, which caused the attention of the manufacturer concerned. We performed a failure analysis on the rupture of the eccentric shaft of a jaw crusher that had been in service for more than 100 hours. The purpose was to identify the cause of the fracture and propose improvements to improve product quality and service life.