DD286047A5 - METHOD AND DEVICE FOR THE NON-DESTRUCTIVE QUICK CONTROL OF OIL FILTERS AND FUEL OILS - Google Patents

Abstract

The invention relates to a method and device for the destruction-free Schnellpruefung of OEl and fuel filters by determining the Abscheidefaehigkeit filter cartridges and inserts, especially in non-removable, flameproof OElfiltern. The aim of the invention is the absolutely meaningful determination of the usability of new or reusability of regenerated filters in Serienwuefverfahren. The invention is an extremely simple process, in which inserts and cartridges are evaluated independently of the filter surface exclusively according to the nature of the material used. There are wetted with liquid filters - constantly given in the regeneration - applied to the porosity and thus the resistance of the filter material adjusting line gas flow from air. The immediately adjusting and constant over the Meszzeitraum test pressure immediately in front of the filter characterizes the existing Abscheidefaehigkeit. {Non-destructive rapid test; Oil and fuel filters; capture readiness; Schadgroeszenbestimmung}

Description

For this 1 page drawings

Field of application of the invention

The invention is used in the standard determination of the ability to separate, including Schadgrößebestimmung of oil and fuel filters of all currently known types and makes.

Characteristic of the known state of the art

Since filters of fuels and lubricants were previously used only as a disposable filter, no reason was seen as a standard test of these so important for the life of the engine engines wear parts. Confident in the quality work of the manufacturers, neither distributor, service company nor the customer can detect damage (above all in steel-encapsulated filters) and accordingly prevent the installation of such.

Only laboratory test methods are known, such as the differential pressure measurement when exposed to liquid media (extremely inaccurate), the permeability test with the addition of graphite powder additive defined in quantity and particle size when evaluating the coloring of a series-connected absolute filter (expensive) and the microscopic pore counting method (non-destructive, expensive ).

Object of the invention

The aim of the invention is the absolutely profitable determination of the usability of new or reusability of regenerated oil and fuel filters in the series test procedure.

When using the invention, the rejection of defective filters (of which SW10-13% is subject to manufacturing defects) or non-regenerable filters ensures that damage to engines due to insufficiently filtered lubricants and fuels is virtually ruled out.

-2- 286 047 Presentation of the essence of the invention

Erfindurtgsgemäß a wetted with the test medium filter is acted upon by a line gas flow indicating only according to the pore size and their number per FIScheneinheit and in conditional dependence on the viscosity of the test medium a test pressure as a benchmark for Abscheidefähigkeit or Schadgröße.

Ausführungsbelsplele example 1

According to FIG. 1 of the associated drawing, when the filter 1 is put on, the electrical pulse of the micro-sounder 3 opens the solenoid valve 6.

Due to the pressure regulator 8 is constantly in front of the solenoid valve β to a constant primary pressure. According to the setting of the throttle 5, the defined line gas flow now passes through the filter I and, even after the pore requirement and the associated blow-out effect due to volume increase, keeps the test pressure constant for the reading.

Example 2

According to Figure 3 of the accompanying drawing, the test pressure pp ^ was sketched as a function of the total damage area A of the filter type 2101 101 2005 (Garant-Bulgaria). The curve bend occurring at about 0.75 kPa symbolizes the pore opening pressure.

Claims (6)

1. A method for non-destructive rapid testing of oil and fuel filters - especially with pressure-tight encapsulated oil filters - by pressure measurement, characterized by dp ß the Abscheidefähigkeit including the Schadgrößebestimmung various filter materials regardless of the total area (eg different filter surfaces by manufacturing inaccuracies within a type or strong Deviating surfaces of two sizes when using the same material) can be determined within 2 s without changing the test parameters. 2. A method for non-destructive rapid testing of oil and fuel filters according to claim 1, characterized in that the filter materials are wetted before the test with a liquid test medium, which does not swell the filter materials nonwoven, paper, plastic and elastomers, adhesives and steel or do not attack and are kerosene, diesel fuels, heavy gasoline and η-paraffins C ₁ O-CiB. 3. A method for non-destructive rapid testing of oil and fuel filters according to claim 1, characterized in that the primary pressure upstream of the throttle (5) is constant, but varies the wetted filter material passing gas flow during the testing process. 4. A method for non-destructive rapid testing of oil and fuel filters according to claim 1, characterized in that the test pressure ρ _ρ , οι in the range of 1.2-2.2 x pore opening pressure. 5. Apparatus for non-destructive rapid testing of oil and fuel filters, characterized in that they are stationary from the molded rubber (2) for placing the filter (1), microswitch (3), test gauge (4), throttle (5), the microswitch (3) controlled solenoid valve (6), pressure gauge (* /), pressure regulator (8), flow meter (9) and shut-off valve (10). Test manometer (4) and flow meter (9) can be coupled via computer (11). 6. A device for nondestructive rapid testing of oil and fuel filters according to claim 5, characterized in that they are movable from the molded rubber (2) for placing on the filter (1), the rigid conduit (3), the movable conduit (6) Test manometer (4), the throttle (5) with rigid line (7) and mouthpiece (10) and the movable line (8) for blowing off the excess air in the water tank (9) with the immersion depth h defining the primary pressure.