折叠滤芯过滤脏液压油的试验研究

Experimental Study on Filtration of Contaminated Hydraulic Oil by Plaited Filter Cartridge

采用自制的试验装置,对多层复合折叠滤芯过滤脏液压油进行了试验研究,结果表明:(1)液压油温度(或粘度)对滤芯的上下游压差影响很大。当温度小于60℃时压差主要由液压油液的流动性差引起的。随着温度的增加,压差由大变小;当油温大于60℃时,压差变化趋于平缓,这时产生的压差基本由污染颗粒在滤芯表面形成滤饼产生。(2)折叠滤芯在试验前30m in脏油中污染颗粒数迅速下降,随后趋于平缓,运行2h时污染颗粒数量稳定在一个固定范围内,达到了一个动态平衡状态。(3)工况条件下测试的滤芯对某粒径污染颗粒的过滤比数值很小,并且变化很大。

The self-made test device was adopted to do filtration experiment of contaminated hydraulic oil by mult-layer folded filer element, the measurement results could be summarized as： （1） the temperature of the contaminated hydraulic oil（ Tcho ） had very obvious effect on the resistance of the plaited cartridge filtration. When the Tcho 〈 60℃, the hydraulic oil fluidity was the most important factor that influenced the pressure drop of the filter element, and the filtration resistance decreased quickly as the temperature increased. When the Toho 〉 60℃ ,the reason of the resistance appearance was that the pollution particles generated the filter cake. （ 2 ） The number of contamination particles in the dirty oil decreased rapidly during the filtration experiment operating for 30 min and reached a dynamic equilibrium after the test derive opening 2h. （3） The filtration ratio of the filter element gotten in the experiment by the self-made device was very small and changeable under different test time.