传动杆变形状态下CT14型断路器弹簧操动机构应力分布研究

Research on Stress Distribution of Spring Operating Mechanism of CT14 Circuit Breaker Under Deformation of Transmission Rod

高压断路器动作时,因冲击载荷巨大变化引起的传动杆变形对操动机构整体应力分布影响较大。为了研究传动杆变形状态下的高压断路器操动机构应力分布,首先构建CT14型弹簧操动机构的三维模型,然后利用有限元软件Hy.perMesh对CT14型弹簧操动机构进行有限元建模,并通过LS-Dyna计算传动杆变形故障下弹簧操动机构各关键零部件的应力分布特性,最后通过对操动机构关键部位进行应力采集实验来验证理论分析的正确性。通过仿真结果与实验结果的对比分析发现,出现传动杆变形故障后,操动机构大部分零部件的应力分布随故障程度的加深而减小。

The deformation of the transmission rod caused by huge change of impact load has a great influence on the overall stress distribution of the operating mechanism when the high-voltage circuit breaker is in action.Aiming at this problem,this paper firstly establishes a 3D modeling of CT14 spring operating mechanism.Then,it uses the finite element software Hy.perMesh to carry out finite element modeling of CT14 spring operating mechanism,and calculates the stress distribution values of the key components of the spring operating mechanism under transmission rod deformation.Finally,the correctness of the theoretical analysis is verified by the stress acquisition test on the key parts of the operating mechanism.By comparing the simulation results with the test results,it is found that the stress distribution of most parts of the components decreases with the deepening of fault degree after the transmission rod is deformed.