Research on the Relationship between Operating Frequency and Efficiency of Mine Main Ventilators
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摘要: 针对矿井主通风机运行频率与效率之间的关系进行了分析探讨。通过分析通风机整体结构设计、变频调速原理以及运行频率特性,采用实验实测数据拟合的方法,研究了变频风机在不同叶片角度和频率下的风量-效率曲线。结果表明,同一叶片角度、不同频率下的效率曲线具有相似性,并且随着运行频率的增大,效率最高点呈现增大趋势。在夏店煤矿的应用案例中,通过变频调节,使风机效率从69.45%提升至70.72%,验证了变频技术在提高矿井通风系统效率中的有效性。Abstract: This paper explores the relationship between the operating frequency and efficiency of mine main ventilation fans. By analyzing the overall structural design of the ventilation fan, the principle of variable frequency speed regulation, and the operating frequency characteristics, the air volume efficiency curve of the variable frequency fan at different blade angles and frequencies is studied by using the experimental data fitting method. The results indicate that the efficiency curves of the same blade angle at different frequencies have similarity, and the highest efficiency point shows an increasing trend with the increase of operating frequency. In the application case of Xiadian Coal Mine, through frequency conversion regulation, the efficiency of the fan increased from 69.45% to 70.72%, verifying the effectiveness of frequency conversion technology in improving the efficiency of the mine ventilation system.
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