1、Reference numberISO 7241-2:2000(E)ISO 2000INTERNATIONALSTANDARDISO7241-2Second edition2000-03-15Hydraulic fluid power Quick-actioncouplings Part 2:Test methodsTransmissions hydrauliques Raccords rapides Partie 2: Mthodes dessaiCopyright International Organization for Standardization Provided by IHS
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7、000 All rights reservedCopyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 7241-2:2000(E) ISO 2000 All rights reserved iiiContents PageForewordvIntroductionvi1 Scope12 No
8、rmative references13 Terms and definitions .14 Selection and examination of test samples25 Test apparatus .26 Test conditions27 Connect force test.28 Disconnect force test29 Leakage test.39.1 Low pressure, coupled39.2 Low pressure, uncoupled (valved only)49.3 Maximum operating pressure, coupled.59.4
9、 Maximum operating pressure, uncoupled (valved only).510 Extreme temperature test .510.1 Maximum operating temperature exposure, coupled510.2 Maximum operating temperature exposure, uncoupled (valved only) 510.3 Maximum operating temperature service, coupled510.4 Maximum operating temperature servic
10、e, uncoupled (valved only)610.5 Minimum operating temperature, coupled610.6 Minimum operating temperature, uncoupled (valved only)611 Pressure impulse test .611.1 Test coupling611.2 Coupled test.611.3 Uncoupled test (valved only)712 Rotating impulse test713 Endurance test.714 Pressure drop test.815
11、Vacuum test915.1 Coupled test.915.2 Uncoupled test (valved only)1116 Air inclusion test1117 Spillage test1118 Static pressure test .1318.1 Coupled.1318.2 Uncoupled (valved type only).1419 Surge flow test long duration 1420 Surge flow test short duration.1421 Burst test1621.1 Safety precautions.16Cop
12、yright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 7241-2:2000(E)iv ISO 2000 All rights reserved21.2 Burst pressure, uncoupled (valved type only)1621.3 Burst pressure, coup
13、led1622 Data accuracy.1623 Test report and data presentation1624 Summary of information to be supplied1625 Test/production similarity.1726 Identification statement (Reference to this part of ISO 7241)17Annex A (normative) Test data form.18Copyright International Organization for Standardization Prov
14、ided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 7241-2:2000(E) ISO 2000 All rights reserved vForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISOmember bod
15、ies). The work of preparing International Standards is normally carried out through ISO technicalcommittees. Each member body interested in a subject for which a technical committee has been established hasthe right to be represented on that committee. International organizations, governmental and n
16、on-governmental, inliaison with ISO, also take part in the work. ISO collaborates closely with the International ElectrotechnicalCommission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part
17、3.Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this p
18、art of ISO 7241 may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.International Standard ISO 7241-2 was prepared by Technical Committee ISO/TC 131, Fluid power systems,Subcommittee SC 4, Connectors and similar products and components.
19、This second edition cancels and replaces the first edition (ISO 7241-2:1986), which has been technically revised.ISO 7241 consists of the following parts, under the general title Hydraulic fluid power Quick-action couplings: Part 1: Dimensions and requirements Part 2: Test methodsAnnex A forms a nor
20、mative part of this part of ISO 7241.Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 7241-2:2000(E)vi ISO 2000 All rights reservedIntroductionIn hydraulic fluid power
21、 systems, power is transmitted and controlled through a liquid under pressure within anenclosed circuit. Quick-action couplings are used to quickly join or separate fluid conductors, without the use oftools or special devices.Copyright International Organization for Standardization Provided by IHS u
22、nder license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-INTERNATIONAL STANDARD ISO 7241-2:2000(E) ISO 2000 All rights reserved 1Hydraulic fluid power Quick-action couplings Part 2:Test methods1 ScopeThis part of ISO 7241 specifies different test method
23、s which could be applied to quick-action couplings.NOTE Users of this part ISO 7241 may select only the tests applicable to their needs. It is not intended that all tests becarried out for every application.This part of ISO 7241 is applicable to male and female coupling halves, complete couplings, c
24、ouplings with andwithout sealing means when uncoupled, and couplings that are connected and disconnected by a linear and/orrotational motion.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions ofthis part of ISO 7241
25、. For dated references, subsequent amendments to, or revisions of, any of these publicationsdo not apply. However, parties to agreements based on this part of ISO 7241 are encouraged to investigate thepossibility of applying the most recent editions of the normative documents indicated below. For un
26、datedreferences, the latest edition of the normative document referred to applies. Members of ISO and IEC maintainregisters of currently valid International Standards.ISO 3448, Industrial liquid lubricants ISO viscosity classification.ISO 4397, Fluid power systems and components Connectors and assoc
27、iated components Nominal outsidediameters of tubes and nominal inside diameters of hoses.ISO 4411, Hydraulic fluid power Valves Determination of pressure differential/flow characteristics.ISO 5598, Fluid power systems and components Vocabulary.ISO 6803, Rubber or plastics hoses and hose assemblies H
28、ydraulic-pressure impulse test without flexing.ISO 7241-1, Hydraulic fluid power Quick-action couplings Part 1: Dimensions and requirements.3 Terms and definitionsFor the purposes of this part of ISO 7241, the terms and definitions given in ISO 5598 and the following apply.3.1coupling size designati
29、ondesignation that refers to the nominal inside diameter of the hose, in accordance with ISO 4397, that isrecommended for use with the couplingCopyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without
30、license from IHS-,-,-ISO 7241-2:2000(E)2 ISO 2000 All rights reserved4 Selection and examination of test samplesCoupling assemblies selected shall constitute a representative sample of a production lot in all respects: design,material, surface treatment, process, etc.5 Test apparatus5.1 The apparatu
31、s shown in Figures 1 to 7 shall be used.5.2 Apparatus capable of providing test result data accuracy in accordance with clause 22 shall be used.6 Test conditions6.1 Tests shall be carried out at an ambient temperature of 20 C to 35 C, unless otherwise specified.6.2 Tests shall be carried out using a
32、 fluid of ISO VG 32, in accordance with ISO 3448 (i.e. having a viscosity of28,8 mm2/s to 35,2 mm2/s at 40 C).7 Connect force test7.1 Lubricate the coupling interfaces with the test fluid. Insert the coupling in a test fixture. Maintain the internaltest pressure, i.e. the maximum internal pressure a
33、s specified in ISO 7241-1.7.2 Apply a linear force and/or torque to the coupling half until complete connection occurs.NOTE During this operation, the locking mechanism may be operated manually, if necessary, to permit normal coupling ofthe halves.7.3 Measure the connecting force and/or torque, as a
34、ppropriate.7.4 Repeat the test a total of five times on the same test coupling. Average the results of the five tests todetermine the connect force or torque. Report the average connect force or torque in the test report.7.5 Report any conditions of damage or malfunction in the test report.8 Disconn
35、ect force test8.1 Lubricate the coupling interfaces with the test fluid. Insert the coupling in a test fixture. Maintain the internaltest pressure, i.e. the maximum operating pressure specified in ISO 7241-1, and/or the prevailing flow conditions.8.2 Apply linear force and/or torque to the retaining
36、 mechanism of the coupling until disconnection occurs.Measure the disconnect force and/or torque.8.3 Repeat the test for five disconnections on the same test coupling. Average the test results of the five tests todetermine the disconnect force and/or torque. Report the average of the results in the
37、test report.8.4 Report any condition of damage or malfunction in the test report.Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 7241-2:2000(E) ISO 2000 All rights re
38、served 39 Leakage test9.1 Low pressure, coupled9.1.1 Insert the coupling assembly in a test apparatus. Fill the test apparatus with test fluid (see 6.2) to a fluidcolumn height of 750 mm. Apply a 50 N load perpendicular to the coupling centreline at a distance of 10D from theaxis of the gauge balls
39、of the locking device (see Figure 1), where D equals the nominal inside diameter of thehose, in accordance with ISO 4397, that is recommended for use with the coupling.9.1.2 Measure the drop in column height over a minimum test period of 30 min. Calculate the leakage rate inmillilitres per hour.9.1.
40、3 Report the leakage rate in the test report.Dimensions in millimetresD = nominal size of the coupling, in millimetresKey1 Column with top portion graduated for measurement2 Male coupling half3 Steel rod connected to the male coupling half not held in the fixture4 Fixture to hold the female coupling
41、 half5 Female coupling halfa50 N load perpendicular to coupling centrelinebCentreline of locking devicecFluid column heightFigure 1 Low-pressure leakage test apparatus (coupled)Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproductio
42、n or networking permitted without license from IHS-,-,-ISO 7241-2:2000(E)4 ISO 2000 All rights reserved9.2 Low pressure, uncoupled (valved only)9.2.1 Insert each coupling half in a test apparatus. Fill the test apparatus with test fluid (see 6.2) to a fluid columnheight of 750 mm (see Figure 2).9.2.
43、2 Measure the drop in column height over a test period of 30 min. Calculate the leakage rate in millilitres perhour.9.2.3 Report the leakage rate in the test report.Dimensions in millimetresKey1 Column with top portion graduated for measurement2 Coupling half (male or female half) test componentaFlu
44、id column heightbOpen topFigure 2 Low-pressure leakage test apparatus (uncoupled half)Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 7241-2:2000(E) ISO 2000 All righ
45、ts reserved 59.3 Maximum operating pressure, coupled9.3.1 Purge internal air from the circuit. Pressurize the coupling assembly, with the test fluid, at maximumoperating pressure as specified in ISO 7241-1.9.3.2 Observe leakage over a test period of 30 min, while maintaining maximum operating pressu
46、re. Collect andmeasure the leakage in a graduated measuring flask. Calculate the leakage rate, in millilitres per hour.9.3.3 Report the leakage rate in the test report.9.4 Maximum operating pressure, uncoupled (valved only)9.4.1 Purge internal air from the circuit. Pressurize each coupling half, wit
47、h the test fluid, at maximum operatingpressure as specified in ISO 7241-1.9.4.2 Observe leakage over a test period of 30 min, while maintaining maximum operating pressure. Collect andmeasure the leakage for each coupling half in a graduated measuring flask. Calculate the leakage rate, in millilitres
48、per hour.9.4.3 Report the leakage rate in the test report.10 Extreme temperature test10.1 Maximum operating temperature exposure, coupled10.1.1 Fill the coupling assembly with test fluid and subject the assembly to the maximum operating temperaturefor at least 6 h. The coupling shall be internally v
49、ented to atmosphere during temperature adjustment.10.1.2 Allow the coupling to cool to ambient temperature. Disconnect and reconnect the coupling. Determine theleakage rate in accordance with 9.1 and 9.3.10.1.3 Report the leakage rate in the test report.10.2 Maximum operating temperature exposure, uncoupled (valve
