风动砂轮机是打磨金属焊缝表面、清理铸件等工序的常用工具,使用较普遍。风动砂轮机原只有一个开口槽的档风圈,高压气流急速集中从开口槽中排出,与周围的静止空气混合,压力突然改变,就产生较高声级的噪声。频谱多集中于高频段,声级达104～110分贝,并且随机件的磨损量 Wind grinder is to polish the surface of the metal weld, clean castings and other processes commonly used tools, the use of more common. The original pneumatic grinder windshield with only one open slot, high-pressure airflow rapidly concentrated from the open slot discharge, mixed with the surrounding static air, sudden pressure changes, resulting in higher levels of noise. The spectrum is more concentrated in the high frequency range, the sound level of 104 ~ 110 dB, and the wear of random components