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机器噪声源定位是机器低噪声设计的基础。本文以真空行业广为使用的罗茨真空机组为对象,并在机组的周围对应各主要部位布置测点,利用声压法并逐级定位的方法,采用手持式精密噪声分析仪对各测点进行噪声测试分析,从而定位与排列噪声源,确定各主要部位对机组噪声贡献大小。在噪声贡献较大部位处再次细化并进行噪声测量,从而确定该部位各结构的噪声贡献大小并找出优势频率辐射产生的原因,为进一步进行多级真空机组噪声源机理研究和低噪声设计提供依据。
Machine noise source positioning is the basis for low-noise machine design. In this paper, the vacuum industry widely used Roots vacuum unit as the object, and in the main unit around the corresponding arrangement of measuring points, the use of sound pressure method and step by step positioning method, the use of handheld precision noise analyzer for each measuring point Noise test analysis, so as to locate and arrange the noise source, to determine the main parts of the unit noise contribution size. The noise contribution of the larger part of the site again to refine and measure the noise to determine the size of the structure of the part of the noise contribution to find the cause and the reasons for the occurrence of dominant frequency radiation for further multi-stage vacuum unit noise source mechanism and low noise design Provide evidence.