结构振动式流体脉动衰减器滤波机理及试验验证  

Filtering Mechanism of Structural Vibration Type Fluid Pulsation Attenuator and Its Test Verification

作　　者：何志勇[1,2] 何清华[2] 李自光[1] 

机构地区：[1]长沙理工大学汽车与机械工程学院 [2]中南大学机电工程学院

出　　处：《工程机械》2011年第11期16-20,7,共5页Construction Machinery and Equipment

基　　金：湖南省自然科学基金计划项目(09JJ3087);湖南省科技计划项目(2010FJ3003)

摘　　要：介绍泵源液压系统振动与噪声产生的原因,分析液压系统振动与噪声的危害。依据气体消声器的原理,设计制造了一种基于流体-结构(Fluid-structure)耦合振动的结构振动式流体脉动衰减器。建立了结构振动体的运动学模型,求解得到耦合振动共振频率。在液压系统压力脉动测试试验平台上进行了两组试验。试验表明,当衰减器的结构振动体固有共振频率与系统频率接近时,系统的脉动能量得到有效衰减,系统压力波动幅度和脉动率大幅降低,但系统的压力损失也增大。试验结果验证了结构振动式流体脉动衰减器的使用效能和不足,为液压系统振动控制提供了新的技术手段。The text introduces the reason why vibration and noise appear in hydraulic system and analyzes the harm induced by them. According to the principles of gas muffler, we designed a structural vibration type fluid pulsation attenuator based on fluid-structure coupled vibration. Then we have constructed kinematic model of the structural vibration body and solve the coupled vibration resonant frequency. Two groups of testing have been carried out in the pressure fluctuation test platform for hydraulic system. It has been indicated that when the inherent resonance frequency of the filter's structural vibration body is close to that of the system, the pulse energy has been reduced effectively and the pressure fluctuations and pulse rate have been greatly decreased, while the pressure loss has been increased. The result has testified the application efficiency and deficiency of structural vibration type fluid pulsation attenuator so as to provide new technical means for vibration control in hydraulic system.

关 键 词：泵源回路 压力脉动抑制 运动学分析 耦合振动 试验研究 

分 类 号：TB535.1[理学—物理]