为消除凿岩机消声器的结冰问题,美国国际镍公司 Thompson 矿从1976年开始,试图排除压缩空气的水分或研制一种不产生冻结的消声器。曾试用除雾器及其他类型的风水分离器,均未能解决冻结问题,便决定研制不结冰的消声器。通过一系列试验,最后研制一种聚氨基甲酸酯消声器,不仅使噪声级明显降低(由720～121dB(A)降至110dB(A)),而且消 To eliminate icing of the rock drill muffler, Thompson Mine, the nickel company of the United States, started in 1976 to try to get rid of the moisture in the compressed air or to develop a muffler that does not freeze. Have tried defogger and other types of Feng Shui separator, were unable to solve the freezing problem, they decided to develop non-icing muffler. Through a series of experiments, the final development of a polyurethane muffler, not only significantly reduce the noise level (from 720 ~ 121dB (A) down to 110dB (A)), and eliminate