波动载荷下蓄能器组在液压驱动系统中的仿真研究

Study of the simulation of hydraulic accumulator group in construction machinery hydraulic drive system under fluctuant loading

文章研究了采用蓄能器组来有效抑制工程车辆液压驱动系统压力冲击的方法,建立了工程机械液压驱动系统加入蓄能器组后的仿真模型,为工程机械液压驱动系统中蓄能器的选择和匹配以及深入研究泵控马达系统调速特性和动态特性在有、无蓄能器情况下的不同提供了参考;利用AMESim仿真软件与工程车辆多功能试验台进行仿真分析与实验验证。结果表明,对于工作在剧烈波动载荷下的工程车辆液压系统,应根据系统的压力变化幅度配置不同固有频率的蓄能器组,并分段配置各蓄能器的参数来加宽吸收压力波动的频率宽度和压力冲击范围。

The method of controlling pressure impact on hydraulic driving vehicle using a suit of accu- mulator is studied, and a mathematical model of construction machinery hydraulic drive system with accumulator group is built up. It provides good thoughts for accumulator choice and matching of con- struction machinery hydraulic drive system and a good way in studying dynamic and regulative charac- teristics of pump-controlled motor system matched with accumulator sufficient or not. The AMESim simulation software and engineering vehicles multifunction test bench are used for the simulation anal- ysis and experimental verification. The results show that for the engineering vehicle hydraulic system which often works under the fluctuant loading, different natural frequency of the accumulator group should be configured based on the magnitude of pressure changes of the system, and the parameters of each accumulator should be configured segmentally to widen the frequency width of pressure fluctua- tion and pressure shock range.