矿用对旋风机噪声识别技术研究

Noise Identification for Mine Counter-rotating Fans

针对目前矿用对旋轴流局部通风机噪声较高问题,对风机噪声进行了测试,利用频谱分析技术对噪声进行识别。结果表明:对旋风机的噪声主要由气动噪声构成,噪声尖峰主要表现为I、II级叶轮旋转噪声、干扰噪声及其高次谐波噪声。涡流噪声随着载荷的增加而增大,低频噪声随载荷增加变化不明显,高频噪声随载荷增加而增大。

Acoustic measurements of the high noise of mine counter rotating fan are carried out in this paper.Spectralanalyses are used to identify the noise.The results show that the primary noise of the mine counter-rotating fan is aerodynamicnoise.The noise peaks are mainly identified as rotation noise of the first stage impeller and the second stage impeller,it’sinterference noise and noise of higher harmonics.Vortex and high frequency noise increase with increasing blade load,whilethe low frequency noise level remains unchanged.