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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 causes of vibration and noise of pump hydraulic system are introduced, and the hazards of hydraulic system vibration and noise are analyzed. According to the principle of gas muffler, a structural vibration-type fluid pulsation attenuator based on fluid-structure coupling vibration is designed and manufactured. The kinematics model of the structure vibration body is established and the resonance frequency of the coupled vibration is obtained. Two sets of tests were carried out on the hydraulic system pressure pulsation test platform. The experimental results show that the pulsating energy of the system is attenuated effectively when the natural resonance frequency of the structure vibrator of the attenuator is close to the system frequency, and the pressure fluctuation and the pulsation rate of the system are greatly reduced, but the system pressure loss also increases. The test results verify the effectiveness and shortcomings of the structural vibration pulsation attenuator and provide a new technical means for vibration control of the hydraulic system.