李育文　周美娟　刘建秀　王胜永

摘要：针对煤矿户外双层智能柜在运行中易发生高温故障甚至爆炸的问题，以计算流体动力学CFD为基础，运用Fluent软件进行分析，根据煤矿户外双层智能柜的结构、工作条件等，建立有限元模型，设置边界条件.通过正交试验设计模拟方案，对影响柜内温度的风机排风量Q，百叶窗排数N，智能组件的安装位置C三因素进行分析，得出诸因素对柜内影响的显著性大小依次为：Q>N>C，并从中选取最优设计方案，可使柜内最高温度控制在50 ℃，从而满足国家电网的温控要求.数值模拟与试验结果之间的误差为4.2%，验证了有限元模型的正确性，为户外双层智能柜的高温性能设计分析提供了参考.

Abstract：For coal mine outdoor double intelligent cabinet is easy to have high temperature breakdown problems and even explode in operation，based on the computational fluid mechanics，using Fluent software analysis was made.According to the coal mine outdoor double layer structure and the working conditions etc，the finite element model was set up，and the boundary conditions were set.By orthogonal experiment，a simulation scheme was designed，the effect factors of temperature inside cabinet （exhaust air fan Q，shutter row number N and intelligent component layout C）were analyzed. It was concluded that the factors＼' influence on cabinet of significance was as follows： Q>N>C.The optimal design scheme was selected to make that the highest temperature of the cabinet was 50 ℃ ，thus meeting the requirement of temperature control of State Grid.The error between the numerical simulation and experimental results was 4.2%，which verified the correctness of the finite element simulation and provided a reference for design and analysis of high temperature performance outdoor double intelligent cabinet.

0引言

随着煤炭工业的发展，智能化控制设备越来越普及.在户外无遮挡的情况下，夏季环境温度一般达到40 ℃，甚至会更高，加上太阳辐射及元件的发热，有可能使密闭机柜内部的温度超过允许范围.装置长时间地在超负荷高温下运行，会使电器元件的性能降低，产生故障影响系统的正常运行，甚至爆炸[1-3].

关于户外智能柜的温控，朱云霄等[4]研究了户外智能柜的热设计，阐述了户外智能柜机柜散热和保温设计，特别是对热设计中最常用的风机散热应考虑的问题及风机的选型做了较详尽的论述，但是没有从户外智能柜的结构上进行分析.张洋等[5] 对不同的散热方式做了简单的阐述，重点研究了风机散热的方案，为户外控制柜的散热方……