大功率重载荷瞬间动作机构CAE建模与故障仿真

针对断路器这类瞬间动作机构铰链间隙、结构弹性等真实因素诱发机械故障问题， 建立了一种考虑实际工况的高压断路器有限元模型，分析大功率脉冲载荷作用下断路器工作特性，预测弹簧刚度、尺寸偏差对其运动特性的影响， 揭示极限参数、设计缺陷等潜在故障导致断路器机械特性变化规律。该方法克服了试验成本高、工作量大、分析效率低的缺点；弥补了传统断路器故障样本参数单一，难以系统分析故障产生原因的缺陷；对提高断路器故障诊断水平有重要意义。

CAE Modeling and Fault Simulation for Instantaneous Action Mechanism with High Power and Heavy Load

A FEM simulation of a high voltage circuit breaker under actual conditions is proposed to solve the high-frequency vibration and mechanical failure problems caused by the realistic factors such as the clearance and structural elasticity of the breaker. Its operating characteristic under the high power pulse load is analyzed and the influence of the spring stiffness and dimension error on the breaker’s motion characteristics was predicted. On the basis of the dependency of the breaker’s mechanical characteristics on potential faults, critical parameters and design defects are established. The new FEM of the a high-voltage circuit breaker will replace the traditional high-cost, large-work-load, and inefficient experimental diagnostic method. It also eliminates the obstacles of the systematic analysis on the fault generation mechanisms, such as the lack of fault samples of traditional experimental methods, and thus significantly improves the fault diagnosis for the high-voltage circuit breakers.