共振型液压脉动衰减器研究现状及展望

Research Status and Prospects of Resonant-type Hydraulic Pulsation Attenuators

压力脉动通常被认为是振动和噪声的主要来源,使用合适的方法衰减压力脉动对液压系统的减振降噪有着十分重要的意义。共振型液压脉动衰减器由于能够有效衰减固有频率附近的压力脉动、压力损失小、变换类型多、成本低、可靠性高,在实际中得到了广泛的运用。在归纳总结国内外研究现状的基础上,将共振型脉动衰减器分为H型、多腔体型、流体-结构耦合振动型三类,并分别阐述各个类别的研究进展及使用性能。对各个类别的共振型脉动衰减器性能特点进行比较以方便用户合理选用设计。针对现存技术存在的不足,阐述今后研究的重点方向并指出紧凑性好、通用性高、频率适应性强是未来共振型液压脉动衰减器的发展趋势。提出一种新型拓扑结构的共振型脉动衰减器,该种衰减器能够灵活调整自身形状以适应严苛的安装空间要求。

Pressure pulsation is generally considered as the main source of vibration and noise, attenuating the pressure pulsation in an appropriate method has a very important significance for reducing vibration and noise in the hydraulic system. Due to the effectiveness in attenuating the pressure pulsation near the nature frequency, small pressure loss, conversion of many kinds, low cost and high reliability, resonant-type hydraulic pulsation attenuators have been widely used in practice. After summarizing the research status, the resonant-type hydraulic pulsation attenuators are classified into three categories： Helmholtz resonator, multiple-chamber type and fluid-structure coupled vibration type, research progress and performance of each category are expounded respectively. Comparisons are conducted among the performance characteristics of each category resonance-type pulsation a^enuator to facilitate the users to chose and design them properly. For the deficiency of current technology, the focus direction of the further research is elaborated and it is concluded that good compactness, niee versatility, excellent adaptability of attenuation frequency is the future trend of development of resonant-type hydraulic pulsation attenuator. Finally, a resonant-type pulsation attenuator of new topology structure is proposed, this kind of attenuator can flexibly adjust its shape to fit the demanding space requirements.