1、BRITISH STANDARD BS 7403-11: 1998 ISO 4548-11: 1997 Full-flow lubricating oil filters for internal combustion engines Part 11: Methods of test for self-cleaning filters ICS 21.260BS7403-11:1998 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was publish
2、ed underthe authority ofthe Standards Board and comes intoeffect on 15 February 1998 BSI 04-1999 ISBN 0 580 29469 2 National foreword This British Standard reproduces verbatim ISO 4548-11:1997 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Tec
3、hnical Committee MCE/21, Filters for gases and liquids, to Subcommittee MCE/21/5, Filters for lubricating oil, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for chan
4、ge, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or
5、 European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the
6、 necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii,
7、theISO title page, page ii, pages 1 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date C
8、ommentsBS7403-11:1998 BSI 04-1999 i Contents Page National Foreword Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Graphical symbols 2 5 Test method for absolute rating (maximum particle diameter transmitted) 2 5.1 Principle 2 5.2 Test equipment and materials 2 5
9、.3 Test procedure 4 5.4 Test results 4 6 Test method for pressure differential/flow characteristics 4 6.1 Principle 4 6.2 Test equipment and materials 4 6.3 Test procedure 6 6.4 Test results 6 7 Test methods for evaluation of gravimetric efficiency and self-cleaning ability of the complete filter 6
10、7.1 Principle 6 7.2 Test equipment and materials 6 7.3 Test procedure for continuous self-cleaning filters 6 7.4 Test procedure for intermittent self-cleaning filters 9 7.5 Test results 9 8 Test for resistance of the filtering element to high differential pressure 10 8.1 Principle 10 8.2 Test equipm
11、ent and materials 10 8.3 Test procedure 10 8.4 Test results 10 9 Test for resistance of the filtering element to elevated temperature 10 9.1 Principle 10 9.2 Test equipment and materials 10 9.3 Test procedure 10 9.4 Test results 10 10 Test for the effects of the presence of water 10 10.1 Principle 1
12、0 10.2 Test equipment and materials 12 10.3 Test procedure 12 10.4 Test results 12 11 Test for mechanical stability to alternating direction of flow 12 11.1 Principle 12 11.2 Test equipment and materials 12 11.3 Test procedure 12 11.4 Test results 14 11.5 Acceptance criteria 14BS7403-11:1998 ii BSI
13、04-1999 Page Annex A (informative) Examples of graphs of differential pressure versus time 15 Annex B (informative) Bibliography Inside back cover Figure 1 Test rig for measurement of maximum particle diameter transmitted 3 Figure 2 Test rig for evaluation of differential pressure as a function of f
14、luid flow rate and viscosity 5 Figure 3 Test rig for evaluation of gravimetric efficiency and cleaning ability 7 Figure 4 Test rig for evaluation of filtering element resistance to elevated temperature 11 Figure 5 Test rig for mechanical stability to alternating direction of flow 13 Figure 6 Cycles
15、for endurance test 14 Figure A.1 Main test 15 Figure A.2 Additional tests (5 blocking and cleaning cycles) 15 Figure A.3 Filtration and cleaning tests 16 Table 1 Particle size distribution of glass microspheres 2 Table 2 Accuracy of measuring instruments 2 Descriptors: Internal combustion engines, l
16、ubrication systems, oil filters, tests, performance tests, test equipment.BS7403-11:1998 ii BSI 04-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norma
17、lly carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in th
18、e work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard req
19、uires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 4548-11 was prepared by Technical Committee ISO/TC 70, Internal combustion engines, Subcommittee SC 7, Tests for lubricating oil filters. ISO4548 consists of the following parts, under the general title M
20、ethods of test for full-flow lubricating oil filters for internal combustion engines: Part 1: Differential pressure/flow characteristics; Part 2: Element by-pass valve characteristics; Part 3: Resistance to high differential pressure and to elevated temperature; Part 4: Initial particle retention ef
21、ficiency, life and cumulative efficiency (gravimetric method); Part 5: Cold start simulation and hydraulic pulse durability test; Part 6: Static burst pressure test; Part 7: Vibration fatigue test; Part 9: Inlet and outlet anti-drain valve tests; Part 10: Life and cumulative efficiency in the presen
22、ce of water in oil; Part 11: Self-cleaning filters; Part 12: Particle retention ability and contaminant holding capacity using particle counting. Annex A and Annex B of this part of ISO4548 are for information only.BS7403-11:1998 BSI 04-1999 1 Introduction ISO4548 establishes standard test procedure
23、s for measuring the performance of full-flow lubricating oil filters for internal combustion engines. It has been prepared in separate parts, each part relating to a particular performance characteristic. Together the tests provide the information necessary to assess the characteristics of a filter,
24、 but if agreed between the purchaser and the manufacturer, the tests may be conducted separately. 1 Scope This part of ISO4548 specifies test methods for evaluating the characteristics of self-cleaning oil filters for internal combustion engines. It is applicable to filters in which self-cleaning is
25、 continuous or intermittent. The removal of retained particles from the filter is achieved by periodic reversal of the direction of the fluid flow through the elements. However, this also applies mechanical stresses to the filter media. The tests specified in this standard are designed to check the
26、filtration performance of the elements under simulated operating conditions and to confirm their ability to withstand, without damage, variations in oil pressure, temperature, direction of flow and the presence of water. The equipment and procedures specified in this part of ISO4548 are recommended
27、for filters having a nominal flow rate of up to1600l/min. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO4548. At the time of publication, the editions indicated were valid. All standards, are subject
28、to revision, and parties to agreements based on this part of ISO4548 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 1219-1:1991, Fluid power
29、 systems and components Graphic symbols and circuit diagrams Part 1: Graphic symbols. ISO 2942:1994, Hydraulic fluid power Filter elements Determination of fabrication integrity and determination of the first bubble point. ISO 3722:1976, Hydraulic fluid power Fluid sample containers Qualifying and c
30、ontrolling cleaning methods. ISO 4405:1991, Hydraulic fluid power Fluid contamination Determination of particulate contamination by the gravimetric method. ISO 4548-1: 1) , Methods of test for full-flow lubricating oil filters for internal combustion engines Part 1: Pressure drop/flow characteristic
31、s. ISO 11841-1: 2) , Road vehicles and internal combustion engines Filter vocabulary Part 1: Definitions of filters and filter components. ISO 11841-2: 2) , Road vehicles and internal combustion engines Filter vocabulary Part 2: Definitions of characteristics of filters and their components. ISO 121
32、03-1: 2) , Road vehicles Test dust for filter evaluation Part 1: Arizona test dust. 3 Definitions For the purposes of this part of ISO4548, the definitions given in ISO 11841-1 and ISO 11841-2, together with the following definitions apply. 3.1 continuous self-cleaning filter filter in which the pro
33、cess of cleaning the filtering elements operates permanently, irrespective of the operating conditions of the filter and the degree of blockage of the filtering medium 3.2 intermittent self-cleaning filter filter in which the process of cleaning the filtering elements operates only when one of the c
34、haracteristic operating parameters of the filter (time, pressure drop) reaches a predetermined value 3.3 retention capacity mass of specific contaminant that the filtering element can retain at its nominal flow rate before its differential pressure reaches a specified value, such as the value that i
35、nitiates self-cleaning 3.4 filtration efficiency ability of the filter to retain particles contained in the fluid to be filtered 1) To be published. (Revision of ISO 4548-1:1982) 2) To be published.BS7403-11:1998 2 BSI 04-1999 3.5 absolute rating diameter, expressed in micrometres, of the largest no
36、n-deformable spherical particle capable of passing through the filtering element under predetermined test conditions 3.6 pressure gauge pressure 4 Graphical symbols The graphical symbols used in this part of ISO4548 are in accordance with ISO 1219-1. 5 Test method for absolute rating (maximum partic
37、le diameter transmitted) 5.1 Principle The test on the filtering element consists of filtering a suspension of calibrated glass microspheres at the nominal flow rate of the filtering element to be tested. A microscopic observation of all the spheres that have passed through the filtering element the
38、n allows measurement of the diameter of the largest sphere passing through. The test gives an indication of the size of the largest pore of the filtering medium employed. NOTEThe test applies only to the filtering element and not to the complete filter. However a test on the complete filter may be c
39、arried out by mutual agreement between the purchaser and the supplier. 5.2 Test equipment and materials 5.2.1 Test fluid In the absence of any contrary agreement between the supplier and the purchaser of the filter, the oil for the test is to be a pure mineral oil with a kinematic viscosity as ISO V
40、G15 (see 1), used at ambient temperature. 5.2.2 Contaminant The measurement of the maximum size of particle transmitted shall be carried out with glass microspheres with the particle size distribution given inTable 1. Table 1 Particle size distribution of glass microspheres 5.2.3 Measuring instrumen
41、ts The measuring instruments shall be capable of measuring to the levels of accuracy given inTable 2. Table 2 Accuracy of measuring instruments 5.2.4 Test rig The test rig is shown diagramatically inFigure 1. It shall include the components described in5.2.4.1 to5.2.4.3. 5.2.4.1 Pressure regulator 1
42、: capable of regulating the pressure maintained in the tank 6 to guarantee a flow of the fluid in the filter under test 10 at its nominal flow rate. Tests shall be conducted to determine the oil flow rate/air pressure curve. 5.2.4.2 Centrifugal pump 13: capable of providing a turbulent flow of Re $
43、3 000 in the pipelines. 5.2.4.3 Purification filter 15: capable of maintaining a level of particulate contamination of the circuit less than or equal to 2 mg/l, in accordance to ISO4405. Diameter Mass 4m % 20 5 3 $ 20 to 40 10 3 $ 40 to 60 20 3 $ 60 to 100 30 5 $ 100 to 200 35 5 Measurement Accuracy
44、 % Test flow rate 5 Relative pressure 2 Differential pressure 4 Temperature 1BS7403-11:1998 BSI 04-1999 3 Figure 1 Test rig for measurement of maximum particle diameter transmittedBS7403-11:1998 4 BSI 04-1999 5.3 Test procedure 5.3.1 Preparation of the test rig 5.3.1.1 Fill the mixing tank 6 with 4
45、l of test fluid and open isolating valves (8, 11 and 14). 5.3.1.2 Set the three-way valve 9 to allow oil to flow through the recycle circuit. 5.3.1.3 Start the pump 13 and slowly close valve 14 causing the fluid to flow through the purification filter for about 30 min. 5.3.1.4 Take a sample of fluid
46、 at valve 18 and check that its particulate contamination level is less than or equal to2mg/l in accordance with ISO4405. 5.3.1.5 If the contamination level is not satisfactory, continue purification or install a more efficient purification filter 15. 5.3.1.6 If the contamination level is satisfacto
47、ry, stop the pump 13, close isolating valves (8, 11 and14) and set the three-way valve 9 to allow the oil to flow to the test line. 5.3.2 Integrity check Check the integrity of the filtering element in accordance with ISO2942. 5.3.3 Filter test NOTEThe test flow rate should not be greater than 20 l/
48、min. If the filtering element to be tested has a designated flow rate less than 20 l/min, it should be tested at that flow rate. If the designated flow rate is greater than 20 l/m, the test should be performed using an element with identical technology and construction, but with reduced height so, t
49、hat the flow velocity of the fluid through the element under test is the same as for the element to be qualified. 5.3.3.1 Mount the filtering element in the filter body, or test housing, of the test filter 10 and install the assembly on the test rig. 5.3.3.2 Start up the agitator 4. 5.3.3.3 Through orifice 7, using a clean funnel prepared in accordance with ISO 3722, introduce0,025 g of contaminant previously mixed in 5 cm 3of test fluid. 5.3.3.4 Remove the funnel, cl
