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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 7241-2:2000 ICS 23
2、.100.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Hydraulic fluid power Quick-action couplings Part 2: Test methods Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared unde
3、r the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 2000 BSI 05-2000 ISBN 0 580 34772 9 BS ISO 7241-2:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard re
4、produces verbatim ISO 7241-2:2000 and implements it as the UK national standard. It supersedes BS 7198-2:1989 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee MCE/18, Fluid power systems and components, to Subcommittee MCE/18/-/4, Connectors and associ
5、ated components, 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 change, and keep the UK interests informed; monitor related international and European development
6、s 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 publications referred to in this document may be found in the BSI Standards Catalogue under the
7、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 necessary provisions of a contract. Users of British Standards are responsible for their correct application.
8、 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, the ISO title page, pages ii to vi, pages 1 to 22, an inside back cover and a back cover. The BSI copyright notice displayed i
9、n this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 7241-2:2000(E) INTERNATIONAL STANDARD ISO 7241-2 Second edition 2000-03-15 Hydraulic fluid power Quick-action c
10、ouplings Part 2: Test methods Transmissions hydrauliques Raccords rapides Partie 2: Mthodes dessai Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 7241-2:2000(E) ii? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:
11、00 2006, Uncontrolled Copy, (c) BSI ISO 7241-2:2000(E) ?iii Contents?Page Forewordv Introductionvi 1?Scope 1 2?Normative references1 3?Terms and definitions .1 4?Selection and examination of test samples2 5?Test apparatus .2 6?Test conditions 2 7?Connect force test .2 8?Disconnect force test 2 9?Lea
12、kage test.3 9.1?Low pressure, coupled3 9.2?Low pressure, uncoupled (valved only)4 9.3?Maximum operating pressure, coupled.5 9.4?Maximum operating pressure, uncoupled (valved only).5 10?Extreme temperature test .5 10.1?Maximum operating temperature exposure, coupled5 10.2?Maximum operating temperatur
13、e exposure, uncoupled (valved only) 5 10.3?Maximum operating temperature service, coupled5 10.4?Maximum operating temperature service, uncoupled (valved only)6 10.5?Minimum operating temperature, coupled6 10.6?Minimum operating temperature, uncoupled (valved only) 6 11?Pressure impulse test .6 11.1?
14、Test coupling6 11.2?Coupled test.6 11.3?Uncoupled test (valved only)7 12?Rotating impulse test 7 13?Endurance test.7 14?Pressure drop test.8 15?Vacuum test9 15.1?Coupled test.9 15.2?Uncoupled test (valved only)11 16?Air inclusion test11 17?Spillage test11 18?Static pressure test .13 18.1?Coupled.13
15、18.2?Uncoupled (valved type only).14 19?Surge flow test long duration 14 20?Surge flow test short duration.14 21?Burst test16 21.1?Safety precautions.16 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 7241-2:2000(E) iv? 21.2?Burst pressu
16、re, uncoupled (valved type only)16 21.3?Burst pressure, coupled16 22?Data accuracy.16 23?Test report and data presentation16 24?Summary of information to be supplied16 25?Test/production similarity.17 26?Identification statement (Reference to this part of ISO 7241)17 Annex A (normative) Test data fo
17、rm .18 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 7241-2:2000(E) ?v Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing
18、International Standards is normally 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 liaiso
19、n with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International
20、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 part of ISO 7241 may
21、be the subject of patent rights. 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. This second editio
22、n 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 titleHydraulic fluid power Quick-action couplings: Part 1: Dimensions and requirements Part 2: Test methods Annex A forms a normative part of th
23、is part of ISO 7241. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 7241-2:2000(E) vi? Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. Quick-
24、action couplings are used to quickly join or separate fluid conductors, without the use of tools or special devices. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD?ISO 7241-2:2000(E) ?1 Hydraulic fluid power Quick-act
25、ion couplings Part 2: Test methods 1?Scope This part of ISO 7241 specifies different test methods 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 be carried out for every applica
26、tion. This part of ISO 7241 is applicable to male and female coupling halves, complete couplings, couplings with and without sealing means when uncoupled, and couplings that are connected and disconnected by a linear and/or rotational motion. 2?Normative references The following normative documents
27、contain provisions which, through reference in this text, constitute provisions of this part of ISO 7241. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 7241 are encouraged to investiga
28、te the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 3448,Industrial liqu
29、id lubricants ISO viscosity classification. ISO 4397,Fluid power systems and components Connectors and associated components Nominal outside diameters of tubes and nominal inside diameters of hoses. ISO 4411,Hydraulic fluid power Valves Determination of pressure differential/flow characteristics. IS
30、O 5598,Fluid power systems and components Vocabulary. ISO 6803,Rubber or plastics hoses and hose assemblies Hydraulic-pressure impulse test without flexing. ISO 7241-1,Hydraulic fluid power Quick-action couplings Part 1: Dimensions and requirements. 3?Terms and definitions For the purposes of this p
31、art of ISO 7241, the terms and definitions given in ISO 5598 and the following apply. 3.1 coupling size designation designation that refers to the nominal inside diameter of the hose, in accordance with ISO 4397, that is recommended for use with the coupling Licensed Copy: sheffieldun sheffieldun, n
32、a, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 7241-2:2000(E) 2? 4?Selection and examination of test samples Coupling assemblies selected shall constitute a representative sample of a production lot in all respects: design, material, surface treatment, process, etc. 5?Test app
33、aratus 5.1?The apparatus 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 conditions 6.1?Tests shall be carried out at an ambient temperature of 20 C to 35 C, unless otherwise specified. 6.2?Tests s
34、hall be carried out using a fluid of ISO VG 32, in accordance with ISO 3448 (i.e. having a viscosity of 28,8 mm2/s to 35,2 mm2/s at 40 C). 7?Connect force test 7.1?Lubricate the coupling interfaces with the test fluid. Insert the coupling in a test fixture. Maintain the internal test pressure, i.e.
35、the maximum internal pressure as 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 of the halves. 7.3?Measure the c
36、onnecting force and/or torque, as appropriate. 7.4?Repeat the test a total of five times on the same test coupling. Average the results of the five tests to determine the connect force or torque. Report the average connect force or torque in the test report. 7.5?Report any conditions of damage or ma
37、lfunction in the test report. 8?Disconnect force test 8.1?Lubricate the coupling interfaces with the test fluid. Insert the coupling in a test fixture. Maintain the internal test pressure, i.e. the maximum operating pressure specified in ISO 7241-1, and/or the prevailing flow conditions. 8.2?Apply l
38、inear force and/or torque to the retaining 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 to determine the disconnect force and/or torq
39、ue. Report the average of the results in the test report. 8.4?Report any condition of damage or malfunction in the test report. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 7241-2:2000(E) ?3 9?Leakage test 9.1? Low pressure, coupled 9
40、.1.1?Insert the coupling assembly in a test apparatus. Fill the test apparatus with test fluid (see 6.2) to a fluid column height of 750 mm. Apply a 50 N load perpendicular to the coupling centreline at a distance of 10D from the axis of the gauge balls of the locking device (see Figure 1), where D
41、equals the nominal inside diameter of the hose, 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 in millilitres per hour. 9.1.3?Report the leakage rate in the test repo
42、rt. Dimensions in millimetres D = nominal size of the coupling, in millimetres Key 1?Column with top portion graduated for measurement 2?Male coupling half 3?Steel rod connected to the male coupling half not held in the fixture 4?Fixture to hold the female coupling half 5?Female coupling half a 50 N
43、 load perpendicular to coupling centreline b Centreline of locking device c Fluid column height Figure 1 Low-pressure leakage test apparatus (coupled) Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 7241-2:2000(E) 4? 9.2? Low pressure, u
44、ncoupled (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 column height of 750 mm (see Figure 2). 9.2.2?Measure the drop in column height over a test period of 30 min. Calculate the leakage rate in millilitres per hour. 9
45、.2.3?Report the leakage rate in the test report. Dimensions in millimetres Key 1?Column with top portion graduated for measurement 2?Coupling half (male or female half) test component a Fluid column height b Open top Figure 2 Low-pressure leakage test apparatus (uncoupled half) Licensed Copy: sheffi
46、eldun sheffieldun, na, Sun Nov 26 06:53:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 7241-2:2000(E) ?5 9.3? Maximum operating pressure, coupled 9.3.1?Purge internal air from the circuit. Pressurize the coupling assembly, with the test fluid, at maximum operating pressure as specified in ISO 724
47、1-1. 9.3.2?Observe leakage over a test period of 30 min, while maintaining maximum operating pressure. Collect and measure 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 pressur
48、e, uncoupled (valved only) 9.4.1?Purge internal air from the circuit. Pressurize each coupling half, with the test fluid, at maximum operating pressure as specified in ISO 7241-1. 9.4.2?Observe leakage over a test period of 30 min, while maintaining maximum operating pressure. Collect and measure th
49、e leakage for each coupling half in a graduated measuring flask. Calculate the leakage rate, in millilitres per hour. 9.4.3?Report the leakage rate in the test report. 10 Extreme temperature test 10.1 Maximum operating temperature exposure, coupled 10.1.1Fill the coupling assembly with test fluid and subject the assembly to the maximum operating temperature for at least 6 h. The coupling shall be internally vented to atmosphere during temperature adjustment. 10.1.2Allow the coupling to cool to ambient temperature. Disconnect and re