大量事实证明,在实际液压工作系统中,由于阀的切换,液压缸的动作,压缩油的突然释放及变量机构工作等因素的影响,经常引起液压系统内的流量的频繁波动。液压油流量的波动,对液压过滤器的过滤性能会产生很大的影响。相对流量无波动的情况而言,在波动流量影响下,滤油器过滤效果变坏,过滤精度大幅度降低。然而,目前国际国内采用的滤油器性能评定方法(ISO4572—滤油器多次通过试验方法),要求试验时通过被试滤油器的流量为稳定值(被试滤油器的额定流量)。因此,一个用多次通过方法测定的滤油器,在有流量波动的液压系统中使用 A large number of facts have proved that in the actual hydraulic work system, due to the valve switching, the action of the hydraulic cylinder, the sudden release of compressed oil and variable body work and other factors, often cause frequent fluctuations in the hydraulic system flow. Fluctuations in hydraulic flow can have a significant impact on the filtration performance of hydraulic filters. Relative fluctuations in the case of no flow, under the influence of fluctuating flow, the filter effect of the filter deterioration, a significant reduction in filtration accuracy. However, the current international and domestic oil filter performance evaluation method (ISO4572 - filter repeatedly through the test method), the test required by the test when the flow of the oil filter is a steady value (the subject of the rated flow of the oil filter) . Therefore, a multi-pass method to determine the oil filter, the flow fluctuations in the hydraulic system used