1、 Reference number ISO 16589-5:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 16589-5 Second edition 2011-04-15 Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 5: Identification of visual imperfections Bagues dtanchit lvres pour arbres tournants incorporant des lments dtanch
2、it thermoplastiques Partie 5: Identification des imperfections visuelles ISO 16589-5:2011(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, includi
3、ng 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 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
4、 in Switzerland ii ISO 2011 All rights reservedISO 16589-5:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Characteristic imperfections1 4.1 Definition of sealing lip critical area1 4.2 Type and name of im
5、perfections .1 4.3 Visual imperfections on seals with additional components.2 4.3.1 Outer circumference portion2 4.3.2 Protection lip2 5 Identification statement (Reference to this part of ISO 16589)2 Bibliography14 ISO 16589-5:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International O
6、rganization 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 committee has been estab
7、lished 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 electrotechnical standardizat
8、ion. 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 member bodies for voting
9、. 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 identifying any or all such p
10、atent rights. ISO 16589-5 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 7, Sealing devices. This second edition cancels and replaces the first edition (ISO 16589-5:2001), which has been technically revised. ISO 16589 consists of the following parts, under the g
11、eneral title Rotary shaft lip-type seals incorporating thermoplastic 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 ISO 16589-5:2011(E) ISO 20
12、11 All rights reserved vIntroduction Rotary shaft lip-type seals are used to retain fluid in equipment where the differential 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
13、 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 retains the seal and prevents static leakage. Careful
14、 storage and handling and proper installation of all seals are necessary to avoid hazards, both prior to and during installation, which would adversely affect service life. INTERNATIONAL STANDARD ISO 16589-5:2011(E) ISO 2011 All rights reserved 1Rotary shaft lip-type seals incorporating thermoplasti
15、c sealing elements Part 5: Identification of visual imperfections 1 Scope ISO 16589 specifies seals utilizing sealing elements manufactured from suitably formulated compounds based on thermoplastic materials, such as polytetrafluoroethylene (PTFE). They are considered suitable for use under low pres
16、sure conditions. This part of ISO 16589 defines and classifies typical surface imperfections that could impair the function of the seals, and is intended as a convenience for purchasers and manufacturers in their discussions concerning the importance of these imperfections in different applications.
17、 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. For undated references,
18、 the latest edition of the referenced document (including any amendments) applies. ISO 5598, Fluid power systems and components Vocabulary ISO 16589-2, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 2: Vocabulary 3 Terms and definitions For the purposes of this documen
19、t, the terms and definitions given in ISO 5598 and ISO 16589-2 apply. 4 Characteristic imperfections 4.1 Definition of sealing lip critical area The sealing lip critical area is defined in Figure 1. 4.2 Type and name of imperfections Some typical imperfections are shown in Figures 2 to 20, and liste
20、d in Tables 1 and 2. ISO 16589-5:2011(E) 2 ISO 2011 All rights reserved4.3 Visual imperfections on seals with additional components 4.3.1 Outer circumference portion The imperfections on the outer circumference portion are the following: a) scratch; b) incorrect chamfer; c) incomplete bond. 4.3.2 Pr
21、otection lip The imperfections on the protection lip are the following: a) tear; b) cut or nick; c) non-fill; d) flash. 5 Identification statement (Reference to this part of ISO 16589) Manufacturers are strongly recommended to use the following statement in test reports, catalogues and sales literat
22、ure when electing to comply with this part of ISO 16589: “Visual imperfection identification is in accordance with ISO 16589-5, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 5: Identification of visual imperfections.” ISO 16589-5:2011(E) ISO 2011 All rights reserved 3
23、aSealing lip critical area. NOTE In cases of wear, imperfections in the sealing lip critical area can impair the function of the rotary shaft lip-type seal during its lifetime. This dimension can vary according to the design standards of individual manufacturers. Figure 1 Sealing lip critical area I
24、SO 16589-5:2011(E) 4 ISO 2011 All rights reserveda) Before lip has been formed b) After lip has been formed Figure 2 Typical imperfections Table 1 Typical visual imperfections Figure 2 item number Description Detail illustration 1 Sealing element reversal (hydrodynamic aid on the inside) Figure 4 2
25、Nicks Figure 5 3 Uneven outer diameter sealant 4 Cut Figure 6 5 Crack Figure 7 6 Inclusion Figure 8 7 Polymer window Figure 9 8 Tear Figure 10 9 Filler projections Figure 11 10 Gasket extrusion Figure 12 11 Sealing lip inversion Figure 13 12 Incomplete trim or folded flash Figure 14 ISO 16589-5:2011
26、(E) ISO 2011 All rights reserved 5Table 2 Typical miscellaneous imperfections Description Detail illustration Incorrect hydrodynamic aid feature Figure 15 Rough surface finish, sealing element Figure 16 Incorrect roll-over of retaining flange Figure 17 Missing gasket Figure 18 Lip eccentric to outer
27、 case diameter (incorrectly formed on mandrel) Figure 19 Lip eccentric to outer case diameter (outer diameter of sealing element undersized) Figure 20 Key 1 tear 2 cut or nick 3 flash 4 non-fill Figure 3 Protection lip imperfections (rubber-covered and elastomeric protection lip) ISO 16589-5:2011(E)
28、 6 ISO 2011 All rights reservedFigure 4 Sealing element reversal (hydrodynamic aid on the inside) Figure 5 Nicks ISO 16589-5:2011(E) ISO 2011 All rights reserved 7Figure 6 Cut Figure 7 Crack ISO 16589-5:2011(E) 8 ISO 2011 All rights reservedFigure 8 Inclusion Figure 9 Polymer window ISO 16589-5:2011
29、(E) ISO 2011 All rights reserved 9Figure 10 Tear Figure 11 Filler projections ISO 16589-5:2011(E) 10 ISO 2011 All rights reservedFigure 12 Gasket extrusion Figure 13 Sealing lip inversion Figure 14 Incomplete trim or folded flash ISO 16589-5:2011(E) ISO 2011 All rights reserved 11a) Correct: Hydrody
30、namic aid feature to suit clockwise rotating shaft when viewed from the air side b) Incorrect Figure 15 Example of correct and incorrect spiral directions of the hydrodynamic aid ISO 16589-5:2011(E) 12 ISO 2011 All rights reserveda) Acceptable b) Unacceptable The figure illustrates a rough surface f
31、inish of a plain lip element, e.g. machining grooves. Figure 16 Rough surface finish, sealing element Figure 17 Incorrect roll-over of retaining flange ISO 16589-5:2011(E) ISO 2011 All rights reserved 13Figure 18 Missing gasket Sections are shown at 180 through a seal. Figure 19 Lip eccentric to out
32、er case diameter (incorrectly formed on mandrel) Sections are shown at 180 through a seal. Figure 20 Lip eccentric to outer case diameter (outer diameter of sealing element undersized) ISO 16589-5:2011(E) 14 ISO 2011 All rights reservedBibliography 1 ISO 6194-1, Rotary shaft lip-type seals incorpora
33、ting elastomeric sealing elements Part 1: Nominal dimensions and tolerances 2 ISO 6194-2, Rotary shaft lip-type seals incorporating elastomeric sealing elements Part 2: Vocabulary 3 ISO 6194-3, Rotary shaft lip-type seals incorporating elastomeric sealing elements Part 3: Storage, handling and insta
34、llation 4 ISO 6194-4, Rotary shaft lip-type seals incorporating elastomeric sealing elements Part 4: Performance test procedures 5 ISO 6194-5, Rotary shaft lip-type seals incorporating elastomeric sealing elements Part 5: Identification of visual imperfections 6 ISO 16589-1, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 1: Nominal dimensions and tolerances ISO 16589-5:2011(E) ICS 23.100.60; 83.140.50 Price based on 14 pages ISO 2011 All rights reserved
