双风机并联通风系统功率特性研究

Research on power characteristics of parallel ventilation system of dual-fan

针对双风井多风机并联运行的矿井通风问题,以冯家塔煤矿通风实例为基础建立了对角并联通风网络模型,采用网络解算和理论论证,研究了公共风道风阻的变化对整个通风系统的影响。

According to the ventilation resistance characteristics problems of mine ventilation network system of parallel operation with duel air shaft and multi-fan, using network solution method and theory, the paper took the ventilation system of Fengjiata coal mine as example, established the diagonal parallel ventilation network model and researched the influence of wind resistance＇ s changes of pub- lic wind channel to entire ventilation system. In the case of the total air volume and total resistance is constant, The study shows that the fan power output is nonlinear changes and the power consumed by public channel increases first and then decreases when the ratio of the public wind channel drag to mine total drag is increasing, the fan output power presents inflection point and the power consumed by the public channel also shows a downward trend when the ratio is about 43%.