Feasibility Study on Large-Loaded Hydraulic Snubber Seal Life Extension Used in Primary Equipment Supports of Nuclear Power Plants
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摘要: 基于液压阻尼器密封件的密封压缩回弹原理,通过密封件压缩变形与服役时间的变化关系曲线,对美国麦奎尔核电厂2号机组运行20 a后拆卸的德国Lisega大吨位液压阻尼器密封件的预测寿命进行了计算。计算结果表明,以德国Lisega公司生产的大吨位液压阻尼器为例,无论是外部密封还是内部密封,其密封件预测寿命明显要长于目前在役或在建核电厂中规定的密封件更换周期。Abstract: Based on the variation of compression set and service time,the projected seal life of the Lisega large loaded hydraulic snubber uninstalled from Mc Guire nuclear power station Unit 2 after maintenance free service for over 20 years are calculated.The results show that,taking the large loaded hydraulic snubber provided by Lisega as an example,the projected seal life for external seal and a seal within the fluid boundary is much longer than the replacing cycle for these seals regulated in nuclear power stations in operation or under construction.
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Key words:
- Primary equipment of nuclear island /
- Hydraulic snubber /
- Life /
- Seal /
- Compression /
- Relaxation
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