Variable‐speed method for improving the performance of a mine counter‐rotating fan,Energy Science & Engineering

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Variable‐speed method for improving the performance of a mine counter‐rotating fan
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-03-24 , DOI: 10.1002/ese3.676
Zijian Ai _{1,

2} , Guoliang Qin ₁ , Jingxiang Lin ₁ , Xuefei Chen ₁ , Wenqiang He ₁

Affiliation

Existing methods of improving the performance of mine counter‐rotating fans (MCRFs) through speed matching of the rotors have certain drawbacks. This study proposes a variable‐speed method for the two rotors of an MCRF to improve its performance, including the blocking margin, operational safety, high‐efficiency working range (HER), and stability margin. Experimental and numerical methods were used to study the pneumatic performance of the MCRF. The results show that the second rotor (R2) is the critical stage affecting the safety of the motor, HER, and blocking margin. A condition‐adaptive speed matching method was proposed for R2 to avoid overloading the second motor at low‐flow rates and to improve the blocking margin and HER. The first rotor (R1) is the critical stage determining the stability margin of the MCRF. Reducing n₁ and increasing n₂ at low‐flow rates helped extend the stability margin.

中文翻译：

变速方法，以提高防雷风扇的性能

现有的通过转子的速度匹配来提高防雷风扇（MCRF）性能的方法存在某些缺陷。这项研究针对MCRF的两个转子提出了一种变速方法，以改善其性能，包括阻塞裕度，操作安全性，高效工作范围（HER）和稳定性裕度。采用实验和数值方法研究了MCRF的气动性能。结果表明，第二个转子（R2）是影响电机安全性，HER和阻塞裕度的关键阶段。针对R2提出了一种条件自适应的速度匹配方法，以避免第二个电动机在低流量时过载，并提高阻塞裕度和HER。第一转子（R1）是决定MCRF稳定性裕度的关键阶段。减少低流量下n ₁和n _2的增加有助于扩大稳定性裕度。

更新日期：2020-03-24

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