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根据有关调查资料证明,在矿山生产建设中使用的局扇,其A声级噪声大多在110分贝左右,有的高达130至140分贝。如此高的噪声,对矿山安全生产和职工身体健康造成严重危害。因此,对现有局扇进行降噪改造,已受到普遍关注。本文根据流体力学和声学有关理论,提出以下局扇降噪改造途径。一、进风口处加
According to the relevant survey data, it is proved that the A-level noise mostly used in the production and construction of mines is about 110 decibels, while some are as high as 130 to 140 decibels. Such high noise has seriously jeopardized the safety of mines and the health of workers. Therefore, it is a general concern that noise reduction should be made on existing fans. Based on the theory of fluid mechanics and acoustics, this paper proposes the following ways of fan noise reduction transformation. First, the air inlet plus