摘要
变压器内部电弧故障可能造成变压器油箱箱体及内部构件严重破坏,为了满足变压器的高故障能量需求,通过布置多孔材料来增强变压器油箱的抗爆性能。分别在低速冲击和高速冲击下,探讨了3种多孔材料的力学特性,对比3种胞元结构在油箱中对爆炸载荷的吸能和抗爆特性,分析了应用在防爆油箱的多孔材料最优胞元结构。研究发现:正-内凹六边形多孔材料能够有效抵御变压器油箱内部爆炸产生的第1个冲击波峰值;而菱形折纸型多孔材料能够在后续爆炸冲击波的作用下持续被压缩,进而减轻变压器油箱泄压阀的工作压力。通过低速压缩试验和落锤冲击试验,验证了该研究结论的合理性。
Internal arc faults in transformers may cause serious damage to the transformer oil tank body and internal components.In order to meet the high fault energy demand of transformers,we enhanced the anti-explosion performance of transformer oil tanks by installing porous materials.The mechanical properties of three porous materials were investigated under low-speed and high-speed impacts,respectively.The energy absorption and anti-explosion characteristics of three cell structures for explosive loads in fuel tanks were compared,and the optimal cell structure for application in explosion-proof fuel tanks was analyzed.It is found that regular concave hexagonal porous materials can effectively resist the first shock wave peak generated by the explosion inside the transformer oil tank.And the diamond-shaped porous material can be continuously compressed under the subsequent explosion shock wave,thereby reducing the working pressure of the transformer oil tank pressure relief valve.Moreover,the rationality of the research conclusions in this paper was verified through low-speed compression tests and drop hammer impact tests.
作者
黎铭
方斌
汪可
赵义焜
苏欣
张进华
LI Ming;FANG Bin;WANG Ke;ZHAO Yikun;SU Xin;ZHANG Jinhua(Key Laboratory of Education Ministry for Modern Design and Rotor-bearing System,Xi'an Jiaotong University,Xi'an 710049,China;China Electric Power Research Institute,Beijing 100192,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2024年第10期4358-4366,共9页
High Voltage Engineering
基金
国家重点研发计划(特高压变压器防爆型油箱与高可靠压力安全释放技术及装备)(2023YFB2407004)。
关键词
防爆油箱
多孔材料
防爆增强设计
力学性能分析
高速冲击
explosion proof fuel tank
porous material
explosion proof enhancement design
mechanical properties
high-speed impact
