摘要
密封继电器常充以一定气压下的保护性气体,以达到增加动作可靠性和延长触头使用寿命的目的。为研究常见保护性气体高纯氮气中不可避免喊有的其他杂质气体对原电弧的影响,针对高纯氮气中混有部分水蒸气的情况建立了热平衡态电弧微观模型;根据道尔顿分压定律、质量作用定律、电荷准中性条件和化学计量平衡条件得到关于各类粒子数密度的非线性方程组;结合具体电弧温度值求解并通过各类粒子数密度的变化来分析水蒸气作为杂质气体对氮气电弧的影响。结果表明:水蒸气的存在会削弱氮气相关电离过程;且电弧温度愈高,其影响愈明显。
In order to improve adtion reliability and life, sealed relay is often filled by some protective gases at certam pressure. High purity nitrogen is a kind of popular protective gas, which unavoidably includes other impurity gases and may do some influence on original arc. For knowing the influence, aimed at the mixture of little water vapor and high purity nitrogen, this paper built up an equilibrium microscopic model of arc, which based onDahoffs law, mass action law, charge neutral law and stoichiometric condition. With the concrete arc temperature, it solved the non- linear formula group on the microscopic parameters, analyzed the influence of little water vapor by the changes of number densities of various particles. The results showed that the existence of the water vapor as the impurity gas could abate the relative processes of nitrogen, and the influence would become more obvious as the arc temperature became higher.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第2期405-408,共4页
High Voltage Engineering
关键词
氮气
水蒸气
平衡态
电弧
微观模型
密封继电器
nitrogen
water vapor
equilibrium
arc
microscopic model
sealed relay
