声阵列测试技术在微型泵降噪中的应用研究

声源定位作为机械降噪的关键之一，有效指导着产品噪声问题的解决。某微型压力水泵的噪声较大，为了有效降噪，综合声阵列测试技术和机械降噪技术，构建了一套完整的降噪优化流程方法。在声源定位过程中采用声阵列采集实验数据，利用声强法与波束形成技术获取得到微型压力水泵噪声源的主要声源位置位于套筒中部，结合流场与结构场的实验分析，进一步验证了泵体噪声主要由套筒结构的振动发声所致。在准确识别声源的位置后提出相应的降低本体噪声的改进方法并进行了验证，结果表明：增大壳体的阻抗特性和通过弱化电机与顶盖和底盖的轴向连接刚度的方式可以有效降低压力水泵的噪声。

Application of Acoustic Array Testing Technique in Miniature Pump Noise Reduction

As one of the key points of mechanical noise reduction, sound source localization effectively guides the solution of product noise problems. The noise of a miniature pressure water pump is relatively large. In order to effectively reduce noise, integrated sound array testing technology and mechanical noise reduction technology, a complete noise reduction optimization process method is constructed. In the sound source localization process, the acoustic array is used to collect experimental data, and the main source of the noise source of the micro pressure pump is obtained by the sound intensity method and beamforming technology. The main sound source position is located in the middle of the sleeve, and the experimental analysis of the flow field and the structure field is further verified. The pump body noise is mainly caused by the vibration of the sleeve structure. After accurately identifying the position of the sound source, the corresponding improved method of reducing the bulk noise is proposed and verified. The results show that the impedance characteristics of the shell and the way of weakening the axial connection stiffness between the motor and the top cover and the bottom cover can be Effectively reduce the noise of the pressure pump.