制冷机房的隔振降噪设计

Design on Vibration and Noise Control for the Refrigerator Room

根据某大型写字楼制冷机房的噪声测试结果,为了降低振动影响,建立了具有中间质量块的双激励双输出二级隔振系统,通过调节隔振器中间质量块的重量调节二阶共振峰值的频率,达到增强隔振降噪效果的目的。经测试,制冷机房的噪声由92.3 dB (A)降低为68.7 dB (A),而且楼板振动明显减小,取到了良好的减振降噪效果。

According to the noise test results of a large office building’s refrigeration room, a double in- centive dual output vibration isolation system is established with intermediate masses in order to reduce vibration. Second-order resonance peak frequency can be changed by adjusting the inter- mediate mass weight of the isolator, and then improve the vibration isolation effect. By noise testing, the noise value in the refrigeration room is reduced from 92.3 dB (A) to 68.7 dB (A). Furthermore, the floor vibration is significantly reduced which indicates the effect of vibration and noise reduction is good.