新型液压消声器吸收液压系统压力脉动的机理和特性

Characteristics and mechanism reducing pressure ripple of hydraulic system with novel hydraulic muffler

基于由多个蓄能器串联安装组成的蓄能器组吸收压力脉动的机理,并结合Helmholtz消声器的消声特性和结构优点,设计了一种新型液压消声器。建立了蓄能器组和新型液压消声器的数学模型,并利用数值仿真对单个蓄能器、多个蓄能器和新型液压消声器吸收某液压系统压力脉动的效果进行了对比分析。数值仿真采用特征线法,基于FORTRAN语言编写,将数值仿真结果与试验数据进行对比,验证了仿真模型和计算方法的有效性。研究结果表明:该新型液压消声器,相比于传统蓄能器,可较好地提高吸收压力脉动的效果,同时相比于蓄能器组,又具有较小的结构参数,具有较大的工程应用价值。

A new hydraulic muffler is designed based on the mechanism of pressure ripple reduction by accumulator group with several accumulators installed in series.This design takes advantages of the characteristics of noise elimination and structure of Helmholtz muffler.The mathematical models of the accumulator group and the new hydraulic muffler are developed.The effects of a single accumulator,an accumulator group and the new hydraulic muffler on the pressure ripple reduction are investigated by numerical simulation using the Method of Characteristics（MOC）and FORTRAN language.The simulation results are compared with experimental data,which verifies the simulation model and calculation method.It is shown that the new hydraulic muffler can more effectively reduce the pressure ripple than the traditional accumulator,meanwhile its structure is smaller than the accumulator group,which is important in engineering application.