HYDRAULIC FILTER PERFORMANCE UNDER VARIABLE FLOW CONDITIONS - TEST SERIES WITH DIFFERENT FLOW PARAMETERS -

摘要

The performance of hydraulic filters is generally rated using the standardized Multi-pass test with constant flow rate. This paper presents a variable flow Multi-pass test and introduces several test and flow parameters, which affect the filtration efficiency. The parameters were selected so that the efficiency can be defined under conditions, which represent the operating values of real hydraulic systems. The presented results are examples of filter test series, in which over 60 elements were tested. The results show how flow form, flow amplitude and cycle rate, which can be defined from a real hydraulic system, affect the efficiency of filters. Some essential test parameters, which are intended for ensuring the reliability of testing and the quality of elements, are also presented with tests.