流–固耦合共振式流体滤波器性能研究

Study on the Performance of Fluid-Solid Coupling Resonant Filter

摘要: 针对液压系统脉动压力衰减和抑制问题，论文设计了一种流–固耦合共振式流体滤波器，分析了滤波器弹性结构振动体的薄板直径及厚度、阻尼平衡孔直径及长度、静压平衡容腔体积等结构参数对滤波器耦合共振频率的影响。在试验台上测试了滤波器的使用效果，耦合共振时压力脉动衰减幅度最大可达44.8%，在泵的压力脉动基频与振动体固有振动频率相差50 Hz的情况下，压力脉动衰减幅度仍达到了28.6%，显示该滤波器对压力脉动良好的抑制效果，具备很好的开发应用价值。

Abstract: Aiming at the attenuation and suppression of the pulsating pressure in the hydraulic system, a fluid structure coupled resonant filter is designed in this paper. The influences of the structural parameters such as the diameter and thickness of the plate, the diameter and length of the damping balance hole and the volume of the hydrostatic balance cavity on the coupling resonance frequency of the filter are analyzed. The effect of the filter is tested on the test-bed. The maximum attenuation amplitude of the pressure pulsation can reach 44.8% when the coupling resonance occurs. When the difference between the basic frequency of the pressure pulsation of the pump and the natural vibration frequency of the vibrating body is 50 Hz, the attenuation amplitude of the pressure pulsation still reaches 28.6%. It shows that the filter has a good suppression effect on the pressure pulsation and has a good development and application value.