优化NBR/ACM与双火山化系统相结合,并适合变压器密封
1Guangdong Provincial Key Laboratory of Electric Power EquipmZent Reliability, Electric Power Research Institute of Guangdong Power Grid Co., Ltd. Guangzhou, Guangdong 510080, China.
ACS omega
|January 8, 2026
概括
这项研究优化了酸 (NBR) /酸 (ACM) 混合物用于变压器密封件. 最好的混合物 (90:10 NBR:ACM) 提供卓越的机械性能,耐热性和油性兼容性,延长密封寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 机械工程 机械工程
背景情况:
- 变压器密封材料需要出色的机械性能和热稳定性.
- 现有的材料可能无法满足变压器的苛刻运行条件.
- 酸 (NBR) 和酸 (ACM) 是先进密封的潜在候选者.
研究的目的:
- 设计和研究用于变压器密封应用的酸 (NBR) /酸 (ACM) 混合物.
- 为了确定最佳的混合比率,以增强全面的性能.
- 在模拟的变压器运行条件下评估优化混合物的性能.
主要方法:
- 使用双火山化系统,NBR/ACM的配方与不同的比例混合.
- 系统评估火山化特性,机械性能 (抗拉强度,破裂时延长,模量,硬度),热稳定性,耐油性和低温密封性能.
- 老化试验包括热空气老化 (125°C×168小时) 和变压器油老化 (125°C×168小时).
主要成果:
- NBR:ACM比率显著影响混合物特性.
- 在90:10 NBR:ACM实现了最佳性能,具有高拉伸强度 (21.15 MPa),破裂时延伸 (276%),硬度 (71 Shore A),以及优异的耐热性.
- 90:10的混合物经过老化后显示最小的体积变化 (2.8%) 和对变压器油性能的低影响 (酸值增加0.03毫克KOH/g),保持稳定的低温密封 (-20°C).
结论:
- 90:10的NBR/ACM混合物提供了一种平衡的机械强度,热稳定性和适合变压器密封件的耐油性.
- 这种优化的混合物为材料升级提供了切实可行的解决方案,提高了密封的寿命,降低了维护成本.
- 开发的材料有效地解决了变压器中复杂的密封环境,最大限度地减少了石油污染和退化.
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