高海拔对矿井轴流式风机性能影响及风机合理选型

高海拔矿井所处环境气压低、空气密度小,导致风机在高海拔环境工作性能明显下降。本文基于风机设计基本理论和矿井通风学原理,研究了高海拔低空气密度对矿井轴流式风机工作性能和配套电机功率的影响,结合实例分析了高海拔矿井风机及配套电机的合理选型方法。研究结果表明:与平原地区相比,高海拔地区的风机体积流量不变,但质量流量下降;风机风压随着空气密度下降而减小,实际风压远低于风机选型的样本风压;电机运行时温升增加,绝缘材料老化加速,电机输出功率下降。

Influence of high altitude on performance of mine axial flow fan and reasonable selection of fan

High-altitude mines have low air pressure and low air density, which leads to a significant decline in the performance of fan in high-altitude environments. Based on the basic theory of fan design and the principle of mine ventilation, the effects of high altitude and low air density on the performance of mine axial flow fan and the matching motor power were studied. The reasonable selection method of high altitude mine fan and matching motor was analyzed with examples. The results show that compared with the plain area, the volume flow of the fan in the high altitude area is constant, but the mass flow rate decreases; the pressure of the fan decreases with the decrease of the air density, and the actual pressure is much lower than the sample pressure of the fan selection. When the motor is running, the temperature rise increases, the aging of the insulating material accelerates, and the output power of the motor decreases.