摘要
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,构建起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。
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 the noise,combining sound array testing technique with mechanical noise reduction technique,a complete noise reduction optimization process is constructed.In the sound source localization process,the acoustic array is used to collect experimental data.The main noise source of the miniature pressure pump is localized by the sound intensity method and beamforming technique,which is in the middle of the sleeve.According to the experimental analysis of the flow field and the structure field,it is further verified that the pump body noise is mainly caused by the vibration of the sleeve structure.After accurately identifying the position of the noise source,a corresponding improvement method for reducing the bulk noise is proposed and verified.The results show that increasing the impedance of the shell and weakening the axial connection stiffness between the motor and the top cover and the bottom cover can effectively reduce the noise of the pressure pump.
作者
白国军
李军
纪红刚
袁国刚
BAI Guojun;LI jun;JI Honggang;YUAN Guogang(Guangdong Zhuhai Supervision Testing Institute of Quality and Metrology,Zhuhai 519060,Guangdong,China;Shanghai Rhythm Electronic Technology Co.,Ltd.,Shanghai 201108,China)
出处
《噪声与振动控制》
CSCD
2019年第3期235-240,249,共7页
Noise and Vibration Control
基金
广东省科技厅资助项目(2018ZJ03)
关键词
声学
降噪
声源识别
波束成形
压力水泵
acoustics
noise reduction
sound source identification
beamforming
pressure pump
