直流电焊机消声装置 西安机械厂锻造车间过去使用的一台直流电焊机,风扇排风产生的噪声达93分贝(A)。为了减少噪声对职工的危害,该厂自行设计、制作了消声装置。 这种悄声装置利用扩张消声原理,采用多孔型吸声材料制做,见结构示意图。风扇噪声产生后,部分声波辐射经塑料泡沫吸? DC welding machine silencer Xi’an Machinery Plant forging shop used in the past, a DC welder, fan exhaust noise of 93 dB (A). In order to reduce the harm of noise to workers, the factory designed and produced a silencer. This quiet device uses the expansion of silencer principle, the use of porous sound-absorbing material system, see the structure diagram. After the fan noise is generated, some of the sound waves are absorbed by the plastic foam.