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引言在各种流体系统中,流源(如液压泵、水泵、空气压缩机等)要周期性地泵送工作介质,因而就不可避免地要产生流量与压力脉功,产生振动和噪声。这种脉动除与泵源本身特性有关外,还与负载及管路系统密切相关。通常,这种脉动是十分有害的,为了对其进行抑制,人们研制了各种流体滤波消声器(在液压系统中常称为液压滤波器,在气体系统中常称为消声器、消振器等)。实践证明,滤波消声器对于抑制流体系统的脉动,提高系统的工作质量,降低噪声是行之有效的。常常可以将70～80％以上的波动抑制掉。一、滤波消声效果的评价准则关于流体滤波消声效果的评价准则,目前尚无统一标准,不同的工作介质系统提出了不同的评价方法。如在气流消声系统中,常用插入损失IL和透射损失TL来评价消声效果。
INTRODUCTION In a variety of fluid systems, flow sources (such as hydraulic pumps, pumps, air compressors, etc.) periodically pump the working medium and thus inevitably generate flow and pressure pulses that generate vibration and noise. In addition to the pulsation of the pump itself characteristics, but also with the load and piping systems are closely related. Usually, this pulsation is very harmful. In order to suppress it, various types of fluid filter mufflers have been developed (often referred to as hydraulic filters in hydraulic systems and mufflers, dampers, etc. in gas systems). Practice has proved that the filter muffler to suppress the pulsation of the fluid system to improve the quality of work of the system to reduce noise is effective. Often 70-80% of the fluctuations can be suppressed. First, the filter noise reduction evaluation criteria On the noise filter effect evaluation criteria, there is no uniform standard, different working medium system proposed different evaluation methods. As in the airflow anechoic system, commonly used insertion loss IL and transmission loss TL to evaluate the muffling effect.