1、 Reference number ISO 16589-4:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 16589-4 Second edition 2011-04-15 Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 4: Performance test procedures Bagues dtanchit lvres pour arbres tournants incorporant des lments dtanchit thermopl
2、astiques Partie 4: Modes opratoires des essais de performance ISO 16589-4:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocop
3、ying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright 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 Switzer
4、land ii ISO 2011 All rights reservedISO 16589-4:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 Pre-test procedure.2 5 Dynamic normal temperature test .2 5.1 Test apparatus .2 5.2 Installation4 5.3 Test co
5、nditions 5 5.4 Test procedure.5 5.5 Post-test measurements.5 5.6 Recording.5 5.7 Acceptance criteria .5 6 Dynamic low temperature test .5 6.1 General .5 6.2 Test apparatus .5 6.3 Installation6 6.4 Test procedure.6 6.5 Post-test measurements.7 6.6 Recording.7 6.7 Acceptance criteria .7 7 Material tes
6、ting of the rotary shaft seal components7 7.1 General .7 7.2 Metallic components (cases) .7 7.3 Non-metallic components.7 7.3.1 Thermoplastic sealing elements7 7.3.2 Elastomeric sealing elements gaskets, protection lip and sealant.7 8 Identification statement (Reference to this part of ISO 16589)7 A
7、nnex A (informative) Typical example of seal test report for the dynamic normal temperature test 8 Annex B (informative) Typical example of a seal test report for the dynamic low temperature test .10 Annex C (informative) Typical example of a material test report (thermoplastic element).12 Annex D (
8、informative) Typical example of a material test report (elastomeric element) 13 Bibliography15 ISO 16589-4:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of
9、preparing 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,
10、 in liaison 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 2. The main t
11、ask of technical committees is to prepare International Standards. 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. Attent
12、ion 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 identifying any or all such patent rights. ISO 16589-4 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 7, Sealing
13、 devices. This second edition cancels and replaces the first edition (ISO 16589-4:2001), which has been technically revised. ISO 16589 consists of the following parts, under the general title Rotary shaft lip-type seals incorporating thermoplastic sealing elements: Part 1: Nominal dimensions and tol
14、erances Part 2: Vocabulary Part 3: Storage, handling and installation Part 4: Performance test procedures Part 5: Identification of visual imperfections ISO 16589-4:2011(E) ISO 2011 All rights reserved vIntroduction Rotary shaft lip-type seals are used to retain fluid in equipment where the differen
15、tial pressure is relatively low. Typically, the shaft rotates and the housing is stationary, although in some applications the 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 t
16、he seal. Similarly, a designed interference fit between the outside diameter of the seal and the diameter of the housing bore retains the seal and prevents static leakage. Careful storage and handling and proper installation of all seals are necessary to avoid hazards, both prior to and during insta
17、llation, which would adversely affect service life. INTERNATIONAL STANDARD ISO 16589-4:2011(E) ISO 2011 All rights reserved 1Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 4: Performance test procedures WARNING Persons using this part of ISO 16589 should be familiar wi
18、th normal laboratory practice. Whilst this part of ISO 16589 does not purport to address all the 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 u
19、ser of this part of ISO 16589 to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1 Scope ISO 16589 specifies seals utilizing sealing elements manufactured from suitably formulated compounds based on thermoplastic materials, such as
20、polytetrafluoroethylene (PTFE). They are considered suitable for use under low pressure conditions. This part of ISO 16589 specifies general performance tests which can be used for seal qualification purposes. Materials quality control, dynamic testing, and supplementary low temperature testing requ
21、irements are covered. NOTE ISO 16589 is complementary to ISO 6194, which covers seals incorporating elastomeric sealing elements. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. Fo
22、r undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5598, Fluid power systems and components Vocabulary ISO 16589-1, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 1: Nominal dimensions and tolerances ISO 16589-2,
23、 Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 2: Vocabulary ISO 16589-4:2011(E) 2 ISO 2011 All rights reserved3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5598 and ISO 16589-2 and the following apply. 3.1 batch ide
24、ntifiable and traceable consignment of thermoplastic and rubber compounds of definite composition and manufactured in a single production operation 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 m
25、anufacturer. 4.2 Ensure that the seal manufacturer has stated the material batch numbers from which the seals have been manufactured. For seals with an elastomeric component, ensure that the seal manufacturer has stated the material batch number from which the elastomeric component of the seal has b
26、een made. 4.3 To facilitate accurate analysis of the test results, determine the following data concerning the physical characteristics of the seal and test apparatus before testing: a) lip diameter immediately prior to assembly onto the shaft; b) lip thickness when measured as assembled on the test
27、 shaft; c) outer case mean diameter and out of roundness; d) shaft diameter, material, hardness and surface roughness; e) housing diameter, material and surface roughness; f) protection lip diameter, when applicable. For a), b) and f), measuring instruments with sharp edges should not be used. The r
28、adial lip load should not be measured before the test. 4.4 Ensure that the specified shaft eccentricity and housing offset of the test apparatus have been incorporated. 5 Dynamic normal temperature test 5.1 Test apparatus The test apparatus shall be similar to the typical example shown in Figure 1 a
29、nd 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 of the housing for the seal shall be in accordance with the dimensions specified in ISO 16589-1.
30、 The housing and the rotating member shall be capable of reproducing the eccentricity and offset referred to in 4.4. ISO 16589-4:2011(E) ISO 2011 All rights reserved 3The test apparatus shall also conform to the following additional requirements. a) The shaft shall be capable of cycling and/or maint
31、aining the shaft speeds to within 5 %. b) The shaft shall be capable of maintaining the specified test eccentricity under dynamic conditions to within 0,03 mm throughout each test. c) The test head shall be designed and constructed so as to maintain the housing bore alignment relative to the test sh
32、aft 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 head and heat transfer system shall be capable of maintaining the temperature of the test fluid within 5 C and shall be vented to atm
33、osphere. f) Heat shall be applied in a manner that does not subject the test fluid to high localized temperatures which could cause fluid decomposition. g) The test shaft shall have a surface which is free of helical machine marks and shall comply with the requirements for shafts specified in ISO 16
34、589-1, Clause 7. h) The test housing bore shall comply with the requirements specified in ISO 16589-1, Clause 8. i) The material properties including hardness, surface finish and dimensions of the test shaft and test housing bore shall conform as closely as possible to the shaft and housing bore to
35、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 0,3 D 1to 0,5 D 1above the lowest point of the shaft diameter D 1 . l) Where the seal housings have inboard bearings, the test housing shall be suitably relieved
36、 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 shall have a device capable of pressurizing the seal housing to the worki
37、ng pressure. o) A liquid level measuring device shall be provided on the test head. ISO 16589-4:2011(E) 4 ISO 2011 All rights reservedKey 1 filler tray 7 test seal 2 insulation 8 test shaft 3 drive from prime mover 9 test head support 4 heater band 10 locking ring 5 cooling coil 11 spacer ring 6 sea
38、l housing 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 seal outside diameter Figure 1 Typical example of dynamic normal temperature test apparatus 5.2 Installation 5.2.1 Thoroughly clean the test head of conta
39、minants and extraneous matter. 5.2.2 Install the seals into the test head so that the cumulative eccentricities of the seals and the test head are known. 5.2.3 Ensure that the plane of the seal lip is perpendicular to the shaft axis, unless otherwise specified. 5.2.4 Locate the test shaft in such a
40、position that a clean unused area of its surface is in contact with the sealing element of the test seal. ISO 16589-4:2011(E) ISO 2011 All rights reserved 55.2.5 Introduce the test fluid, which should be identical to the service fluid, through the filler tray as shown in Figure 1. 5.2.6 If the visco
41、sity of the test fluid is too high to flow out of the filler tray of its own accord, remove the filler tray shown in Figure 1 and replace with an adapter incorporating a grease nipple. Pump the requisite volume of test fluid through the nipple using a grease gun. Remove the grease nipple prior to th
42、e start up, thus preventing over pressurization of the seals. Replace filler tray. 5.3 Test conditions Apply test conditions which simulate the seal application operating conditions, as agreed between the purchaser and supplier, i.e. normal operating temperature, normal operating shaft speed, maximu
43、m envisaged operating temperature, and maximum envisaged shaft speed. 5.4 Test procedure Submit six seals to ten cycles, each of 24 h duration, consisting of 14 h at normal operating temperature and speed, according to service conditions, and 6 h at the maximum envisaged operating temperature and sp
44、eed, followed by a 4 h shut-down to allow the test machine to cool to room temperature. If applicable, each alternate cycle shall be in the reverse direction of rotation. 5.5 Post-test measurements After completion of the test, determine the seal thickness profile, i.e. when measured on a mandrel an
45、d where applicable, the protection lip diameter. 5.6 Recording Record all the test data on a seal test report. NOTE An example of a seal test report for the dynamic test is shown in Annex A. 5.7 Acceptance criteria Typically, the leakage from all six seals shall not be greater than 12 cm 3and the le
46、akage from any single seal shall be not greater than 3 cm 3 . Since leakage is dependent on the application and on the design of the seal, the allowable leakage should be agreed between the purchaser and manufacturer. 6 Dynamic low temperature test 6.1 General This test is applicable to all rotary s
47、haft lip-type seals for which the minimum specified operating temperature is stated to be 10 C or lower. 6.2 Test apparatus The test apparatus shall be similar to the typical example shown in Figure 2. The test shaft and seal housing shall simulate the envisaged maximum eccentricities specified by t
48、he customer. The test shaft diameter, the test shaft surface roughness and seal housing dimensions shall also be those specified by the customer or as specified in ISO 16589-1. ISO 16589-4:2011(E) 6 ISO 2011 All rights reserved6.3 Installation The requirements of 5.2.1, 5.2.2 and 5.2.3 apply. 6.4 Te
49、st procedure Submit two seals to the following procedure. a) Correctly locate the seal in the test fixture. b) Fill the test fixture with the test fluid to submerge the wetted side of the seal lip. c) Place the test fixture in a cold box and soak for 16 h at the minimum temperature specified by the customer. d) With the test fixture still in the cold box, rotate the shaft 10 revolutions by hand at an approximate rotational frequency of 60 min 1 , pausing once every 180. e) Remove the test fixtu
