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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Analysis of the Influence of Different Bionic Structures on the Noise Reduction Performance of the Centrifugal Pump
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Analysis of the Influence of Different Bionic Structures on the Noise Reduction Performance of the Centrifugal Pump

机译：不同仿生结构对离心泵降噪性能的影响分析

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摘要

The strong noise generated during the operation of the centrifugal pump harms the pump group and people. In order to decrease the noise of the centrifugal pump, a specific speed of 117.3 of the centrifugal pump is chosen as a research object. The bionic modification of centrifugal pump blades is carried out to explore the influence of different bionic structures on the noise reduction performance of centrifugal pumps. The internal flow field and internal sound field of bionic blades are studied by numerical calculation and test methods. The test is carried out on a closed pump test platform which includes external characteristics and a flow noise test system. The effects of two different bionic structures on the external characteristics, acoustic amplitude–frequency characteristics and flow field structure of a centrifugal pump, are analyzed. The results show that the pit structure has little influence on the external characteristic parameters, while the sawtooth structure has a relatively great influence. The noise reduction effect of the pit structure is aimed at the wide-band noise, while the sawtooth structure is aimed at the discrete noise of the blade-passing frequency (BPF) and its frequency doubling. The noise reduction ability of the sawtooth structure is not suitable for high-frequency bands.
机译：离心泵运行过程中产生的强烈噪音损害了泵组和人。为了降低离心泵的噪声，选择离心泵117.3的特定速度作为研究对象。离心泵叶片的仿生修改是进行的，以探讨不同仿生结构对离心泵降噪性能的影响。通过数值计算和测试方法研究了仿生叶片的内部流场和内部声场。该测试在封闭的泵测试平台上进行，该泵测试平台包括外部特性和流量噪声测试系统。分析了两种不同仿生结构对离心泵的外部特性，声学幅度特性和流场结构的影响。结果表明，坑结构对外部特征参数几乎没有影响，而锯齿结构具有相对较大的影响。凹坑结构的降噪效果瞄准宽带噪声，而锯齿结构瞄准刀片通频（BPF）的离散噪声及其频率倍增。锯齿结构的降噪能力不适用于高频带。

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