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蓄能器以储存和释放压力油的方式,吸收液压系统的流量脉动和压力脉动,调节系统的能量流通,改善系统的频率响应。这些功能的发挥,依赖于正确的计算和配用。然而,蓄能器的传统理想化计算往往与其实际能量储放存在误差,此误差随工作压力和冲放速度的提高而加剧,并给系统频率以明显影响。本文为弥补传统计算方法之不足,提出了综合考虑蓄能器气腔多变效率和气腔至出口间的传输效率的表观多变指数;集自身实验之结果和国内外学者之实验数据,绘制了实际蓄能器的平均表观多变指数图,简要分析了它的变化规律;建立了以蓄能器单循环排量为基础的、分状态段选择表观多变指数的两种蓄能器容积拟合计算方法。
The accumulator absorbs the flow pulsation and the pressure pulsation of the hydraulic system by storing and releasing pressure oil, and regulates the energy flow of the system to improve the frequency response of the system. The performance of these functions depends on the correct calculation and allocation. However, the traditional idealized calculation of accumulators tends to be inaccurate with their actual energy storage. This error is exacerbated by the increase of working pressure and punching speed, and obviously affects the system frequency. In order to make up for the deficiency of the traditional calculation methods, this paper presents an ephemeral index that takes into account the changeable efficiency of the air cavity of the accumulator and the transmission efficiency between the air cavity and the outlet. The experimental results of the self-experiments and the experimental data of the scholars at home and abroad are plotted The average apparent changeable index of the actual accumulator is briefly analyzed, and its changing rule is briefly analyzed. Two kinds of energy storage systems based on the single circulation displacement of the accumulator are established to select the apparent variable index Volumetric fitting method.