STUDY ON THE INSERTION LOSS CHARACTERISTICS OF SIDE BRANCH RESONATOR IN HYDRAULIC LINE
STUDY ON THE INSERTION LOSS CHARACTERISTICS OF SIDE BRANCH RESONATOR IN HYDRAULIC LINE
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液压管路旁支谐振器插入损耗特性研究
DOI：
10.5739/isfp.2008.353
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
T. Nishiumi
中科院分区：
文献类型：
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作者：
T. Ichiyanagi;T. Nishiumi
四分之一波长侧分支谐振器作为一种反应式消声器已被广泛应用于液压回路中的压力脉动衰减。这种传统的消音器的结构非常简单，因此就成本效率而言，它是一种有用的装置。然而，它也被称为一个相当窄的频带谐振器，只衰减的奇阶谐波的压力脉动。通过改变侧分支插入位置、侧分支与回路终端负载之间连接管的长度等参数，对液压管路中侧分支谐振器的衰减性能进行了数值研究。衰减水平通过插入损耗来评估，插入损耗被定义为具有和不具有侧分支的压力脉动的总振幅谐波的比率。介绍了侧分支的基本原理和插损特性的数学模型。对插入损耗特性进行了计算，分析了偶次谐波的影响，以及泵、终端负载的相互作用和包括侧分支的电路的所有脉动传播特性。
A quarter wavelength side branch resonator has been widely used as a reactive type silencer to attenuate pressure pulsation in hydraulic circuit. The structure of this conventional silencer is very simple and therefore it is a useful device in terms of cost efficiency. However, it is also known as a rather narrow frequency banded resonator that only attenuates the odd order harmonics of the pressure pulsation. In this study, the attenuation performance of side branch resonator in the hydraulic line is examined numerically by changing the parameters such as the insertion location of side branch and the length of connecting pipe between the side branch and termination load of circuits. The level of attenuation is accessed by insertion loss which is defined as the ratio of overall amplitude harmonics of pressure pulsation with and without the side branch. The paper describes the fundamental principle of side branch and the mathematical model of insertion loss characteristics. Some calculation results for the insertion loss characteristics are carried out to show the influence of even order harmonics and the interaction of pump, termination load and all pulsation propagation characteristics of the circuit including side branch.