基于流体-结构耦合振动的液压脉动滤波器试验研究  

Experimental Research on Fluid Pulsation Attenuator Filtering Based on Fluid-Structure Coupling Vibration Mechanism

作　　者：何志勇[1,2,3] 何清华[1] 贺尚红[2] 李涛 

机构地区：[1]中南大学机电工程学院,长沙410083 [2]长沙理工大学,汽车与机械工程学院,长沙410076 [3]长沙市沥青路面筑养路设备煤炭气化工程技术研究中心,长沙410600

出　　处：《中国造船》2012年第1期137-144,共8页Shipbuilding of China

基　　金：国家自然科学基金项目(50875028);湖南省自科基金重点项目(09JJ3087);湖南省科技计划项目(2009GK3126,2010FJ3003);浙江大学流体传动及控制国家重点试验室开放基金项目(GZKF-201021);长沙市科协项目(cx-2010-015)

摘　　要：分析了船上泵源液压系统压力脉动产生的原因及频率成分。根据气体消声器的原理,结合液压系统高压、大流量等工作特点,设计和制造了一种基于流体-结构(fluid-structure)耦合振动的结构共振式液压脉动滤波器,并推导出其波动衰减的传递矩阵模型。通过调整液压泵转速来改变压力脉动频率,在液压系统压力脉动试验平台上进行了三组对比试验。试验表明,当滤波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,系统的压力波动幅度和脉动率大幅降低。试验结果验证了结构共振式液压脉动滤波器的使用效能和存在的不足,它为液压系统振动控制提供了新的技术手段。In this paper,the causes of pressure pulsation of pump source hydraulic system in ships are analyzed and its frequency components are discussed.With respect to the working characteristics of hydraulic system,such as high pressure,large flow rate,etc.,a wave attenuator of structure resonator based on fluid-structure coupling vibration is designed and manufactured.According to the principle of gas muffler,a transfer matrix model of hydraulic system pressure fluctuation attenuation is deduced.Three comparative trials are carried out on the experimental platform by means of adjusting rotation speed of hydraulic pump,on which frequency of the fluctuating pressure can be changed.Experimental results show that,when the inherent resonance frequency of attenuator structural vibration body approaches the hydraulic system frequency,system pulse energy will be effectively attenuated,as well as system pressure fluctuations and pulsation rate will be greatly reduced.Experimental results verify the efficiency in the use of the structure resonance hydraulic pulse attenuator.

关 键 词：泵源回路 压力脉动衰减 传递矩阵 耦合振动 试验研究 

分 类 号：U664.84[交通运输工程—船舶及航道工程] TB53[交通运输工程—船舶与海洋工程]