断路器转动机构失效原因分析

Failure Analysis of Breaker Rotating Mechanism

针对掘进机电控箱内断路器转动手柄在使用过程中出现的损坏问题进行分析,在不改变断路器内部结构的基础上,通过增加外部限位装置来解决断路器失效的问题,减少了井下开箱维修换件的次数,提升了产品的可靠性。

During the design of an axial flow fan, the cascade design of the moving blade has been finished. In order to improve the security of the blade, the failure analysis of the blade has been finished with the finite element method. The simulation results show that the failure position is near to the root of the blade where the inner stress is the concentrative. The method above can improve the dependability of the design, and has important value of engineering applications.