1、BS ISO 6194-4:2009 ICS 23.100.60; 83.140.50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Rotary shaft lip-type seals incorporating elastomeric sealing elements Part 4: Performance test proceduresThis British Standard was published under the authority of the
2、 Standards Policy and Strategy Committee on 30 April 2009 BSI 2009 ISBN 978 0 580 55229 8 Amendments/corrigenda issued since publication Date Comments BS ISO 6194-4:2009 National foreword This British Standard is the UK implementation of ISO 6194-4:2009. It supersedes BS ISO 6194-4:1999 which is wit
3、hdrawn. The UK participation in its preparation was entrusted to Technical Committee MCE/11, Fluid seals and their housings. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of
4、 a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.BS ISO 6194-4:2009Reference number ISO 6194-4:2009(E) ISO 2009INTERNATIONAL STANDARD ISO 6194-4 Third edition 2009-03-15 Rotary shaft lip-type seals incorp
5、orating elastomeric sealing elements Part 4: Performance test procedures Bagues dtanchit lvres pour arbres tournants incorporant des lments dtanchit en lastomre Partie 4: Mthodes dessai de performance BS ISO 6194-4:2009 ISO 6194-4:2009(E) PDF disclaimer This PDF file may contain embedded typefaces.
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8、or printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2009 All rights reserved. Unless o
9、therwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyr
10、ight office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedBS ISO 6194-4:2009 ISO 6194-4:2009(E) ISO 2009 All rights reserved iii Contents Page Foreword iv Introduction v 1
11、 Scope . 1 2 Normative references . 1 3 Terms, definitions and symbols 2 3.1 Terms and definitions. 2 3.2 Symbols . 2 4 Pre-test procedure 2 5 Dynamic normal-temperature test 2 5.1 Test apparatus 2 5.2 Installation . 5 5.3 Test conditions . 5 5.4 Test procedure 5 5.5 Post-test measurements 5 5.6 Rec
12、ording 5 5.7 Acceptance criteria. 5 6 Dynamic low-temperature test 5 6.1 General. 5 6.2 Test apparatus 6 6.3 Installation . 7 6.4 Test procedure 7 6.5 Post-test measurements 7 6.6 Recording 7 6.7 Acceptance criteria. 7 7 Material testing of elastomeric components . 7 7.1 Elastomeric material require
13、ments. 7 7.2 Density . 8 7.3 Hardness 8 7.4 Compression set. 8 7.5 Fluid immersion 8 7.6 Dry-heat ageing in air . 8 7.7 Stiffness at low temperature 9 7.8 Recording 9 8 Identification statement (Reference to this part of ISO 6194) . 9 Annex A (informative) Typical example of a seal test report for t
14、he dynamic test 10 Annex B (informative) Typical example of a seal test report for the dynamic low-temperature test 13 Annex C (informative) Typical example of an elastomeric material test report. 15 Bibliography . 17 BS ISO 6194-4:2009 ISO 6194-4:2009(E) iv ISO 2009 All rights reservedForeword ISO
15、(the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical comm
16、ittee 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 the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrote
17、chnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the memb
18、er 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 document may be the subject of patent rights. ISO shall not be held responsible for identifyi
19、ng any or all such patent rights. ISO 6194-4 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 7, Sealing devices. This third edition cancels and replaces the second edition (ISO 6194-4:1999), which has been technically revised. ISO 6194 consists of the following p
20、arts, under the general title Rotary shaft lip-type seals incorporating elastomeric sealing elements: Part 1: Nominal dimensions and tolerances Part 2: Vocabulary Part 3: Storage, handling and installation Part 4: Performance test procedures Part 5: Identification of visual imperfections BS ISO 6194
21、-4:2009 ISO 6194-4:2009(E) ISO 2009 All rights reserved v Introduction Rotary shaft lip-type seals are used to retain fluid, e.g. lubricant, in equipment where the differential pressure is relatively low. Typically, the shaft rotates, and the housing is stationary, although in some applications the
22、shaft is stationary, and the housing rotates. Dynamic sealing is normally the result of a designed interference fit between the shaft and a flexible element incorporated in the seal. Similarly, a designed interference fit between the outside diameter of the seal, and the diameter of the housing bore
23、, retains the seal and prevents static leakage. Careful storage, handling and proper installation of all seals are necessary to avoid hazards, both prior to and during installation, which would adversely affect service life. BS ISO 6194-4:2009BS ISO 6194-4:2009 INTERNATIONAL STANDARD ISO 6194-4:2009
24、(E) ISO 2009 All rights reserved 1 Rotary shaft lip-type seals incorporating elastomeric sealing elements Part 4: Performance test procedures WARNING Persons using this part of ISO 6194 should be familiar with normal laboratory practice. Whilst this part of ISO 6194 does not purport to address all t
25、he safety problems, if any, associated with its application, attention is drawn to the need to employ sensible precautions while handling hot and cold fluids and equipment. It is the responsibility of the user of this part of ISO 6194 to establish appropriate safety and health practices and to ensur
26、e compliance with any national regulatory conditions. 1 Scope ISO 6194 describes seals utilizing elastomeric sealing elements. They are considered suitable for use under low-pressure conditions (see ISO 6194-1:2007, 6.1). This part of ISO 6194 specifies general test requirements for rotary shaft lip
27、-type seals. The tests may be used for qualification purposes. NOTE ISO 6194 is complementary to ISO 16589 which covers seals incorporating thermoplastic sealing elements. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refe
28、rences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 188, Rubber, vulcanized or thermoplastic
29、 Accelerated ageing and heat resistance tests ISO 812, Rubber, vulcanized or thermoplastic Determination of low-temperature brittleness ISO 815-1, Rubber, vulcanized or thermoplastic Determination of compression set Part 1: At ambient or elevated temperatures ISO 815-2, Rubber, vulcanized or thermop
30、lastic Determination of compression set Part 2: At low temperatures ISO 1817, Rubber, vulcanized Determination of the effect of liquids ISO 2781, Rubber, vulcanized or thermoplastic Determination of density ISO 5598, Fluid power systems and components Vocabulary ISO 6194-1:2007, Rotary shaft lip-typ
31、e seals incorporating elastomeric sealing elements Part 1: Nominal dimensions and tolerances ISO 6194-2, Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 2: Vocabulary BS ISO 6194-4:2009 ISO 6194-4:2009(E) 2 ISO 2009 All rights reserved3 Terms, definitions and symbols 3.1
32、Terms and definitions For the purposes of this document, the terms and definitions given in ISO 6194-2 and ISO 5598 and the following apply. 3.1.1 batch identifiable and traceable consignment of rubber compound of definite composition and manufactured in a single production operation 3.2 Symbols For
33、 the purposes of this document, the symbols given in ISO 6194-1 apply. 4 Pre-test procedure 4.1 Inspect all seals submitted for testing for conformity to a relevant drawing or detailed specification declared by the seal manufacturer. 4.2 For seals with an elastomeric component, ensure that the seal
34、manufacturer has stated the material designation batch number from which the seals have been made, together with the nominal density, nominal hardness, maximum compression set value and maximum volume change after immersion in the test fluid. Where the seal is required for the low-temperature stiffn
35、ess test, ensure that the seal manufacturer has also stated the maximum modulus after test at the selected test temperature. Ensure that the batch of elastomer has been tested in accordance with Clause 7. 4.3 To facilitate accurate analysis of the test results, determine the following data concernin
36、g the physical characteristics of the seal and test apparatus before testing: a) lip diameter (with spring); b) lip diameter (without spring, measured not less than 24 h after removal of spring); c) outer case mean diameter and out-of-roundness; d) shaft diameter, material hardness and surface rough
37、ness; e) housing diameter, material and surface roughness; f) protection lip diameter, where applicable (with and without sealing lip spring fitted). 4.4 Ensure that the specified shaft eccentricity and housing off-set of the test apparatus have been incorporated. 5 Dynamic normal-temperature test 5
38、.1 Test apparatus The test apparatus shall be similar to the typical example shown in Figure 1 and shall consist of a suitable housing for retaining the test fluid and for positioning the test seals, as well as a rotating member having a spindle mounted horizontally on suitable bearings. The design
39、of the housing for the seal shall be in accordance with the dimensions specified in ISO 6194-1. The housing and the rotating member shall be capable of reproducing the eccentricity and off-set specified in 4.4. BS ISO 6194-4:2009 ISO 6194-4:2009(E) ISO 2009 All rights reserved 3Key 1 filler tray 2 i
40、nsulation 3 drive from prime mover 4 heater band 5 cooling coil 6 seal housing 7 test seal 8 test shaft 9 test head support 10 locking ring 11 spacer ring 12 test fluid b nominal seal width D 1nominal diameter of the shaft to be used with the seal D 2nominal diameter of the housing bore or outer dia
41、meter of the seal Figure 1 Typical example of dynamic normal-temperature test apparatus BS ISO 6194-4:2009 ISO 6194-4:2009(E) 4 ISO 2009 All rights reservedWhere it is not practicable to provide a test apparatus with the particular shaft and housing size relevant to the application, the test apparat
42、us shall be selected from the standard sizes listed in Table 1. The size selected shall be that nearest to the application size. Table 1 Standard shaft and housing dimensions Dimensions in millimetres Shaft diameter Housing diameter Seal width D 1D 2b 20 35 7 40 55 8 60 80 8 90 120 12 200 230 15 The
43、 test apparatus shall also conform to the following additional requirements. a) The shaft shall be capable of cycling and/or maintaining the shaft speeds to within 3 %. b) The shaft shall be capable of maintaining the specified test eccentricity under dynamic conditions to within 0,03 mm throughout
44、each test. c) The test head shall be designed and constructed so as to maintain the housing bore alignment relative to the test shaft axis within 0,03 mm throughout the operating temperature range. d) The design of the test head support shall ensure minimum deformation and vibration. e) The test hea
45、d and heat transfer system shall be capable of maintaining the temperature of the test fluid within 3 C, and shall be vented to atmosphere. f) Heat shall be applied in a manner that does not subject the test fluid to high localized temperatures that could cause fluid decomposition. g) The test shaft
46、 shall have a surface that is free of helical machine marks and shall comply with the requirements for shafts specified in ISO 6194-1. h) The test housing bore shall comply with the requirements specified in ISO 6194-1. i) The materials, surface finish and dimensions of the test shaft and test housi
47、ng bore shall conform as closely as possible to the shaft and housing bore to be used in service. j) A minimum quantity of 750 cm 3of test fluid shall be used. k) The level of the test fluid in the test head shall be 0,3D 1to 0,5D 1above the lowest point of the shaft diameter D 1 . l) For seal housi
48、ngs with inboard bearings, the test housing shall be suitably relieved at the bearing supports to prevent excessive fluid pressure between the bearing and seals. m) Means shall be provided for collecting and measuring the mass of any fluid leakage from the seals during the test. n) The test head sha
49、ll have a device capable of pressurizing the seal housing to the working pressure. o) A liquid level measuring device shall be provided on the test head. BS ISO 6194-4:2009 ISO 6194-4:2009(E) ISO 2009 All rights reserved 5 5.2 Installation 5.2.1 Thoroughly clean the test head of contaminants and extraneous matter. 5.2.2 Install the seal into the test head so that the cumulative eccentricities of the seal and the test head are known. 5.2.3 Ensure that the plane of the seal lip is
