基于有限元仿真的SF6开关密封改进与优化

Improvement and Optimization of Seal on SF6 Switchgear Based on Finite Element Simulation

摘要: 针对SF6断路器壳体上部密封圈，在有限元软件中对其密封性能进行了仿真模拟，结果与实际情况较为相近，同时提取一种更直观反映密封性能的参数——密封带长度。在不更改密封结构的前提下，优化密封圈邵尔硬度进行仿真分析，确定合理的邵尔硬度为75 ± 5，之后通过氦检漏仪对优化前后的样机进行试验对比，试验结果表明，优化后的年泄漏率大幅减小，约小于0.5%，具有较高的工程价值。

Abstract: The sealing performance of the upper seal ring of SF6 Pole-mounted Circuit Breaker shell was simulated in finite element software. The results are similar to the actual situation, and a more intuitive parameter, sealing tape length, is extracted. Under the premise of not changing the sealing structure, the reasonable HSA is determined to be 75 ± 5 by simulation analysis, and then the samples before and after optimization are compared by helium leak detector; the experimental results show that the optimized annual leakage rate is greatly reduced, about less than 0.5%, which has high engineering value.