1、BRITISH STANDARD BS ISO 6194-5:2008 Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 5: Identification of visual imperfections ICS 23.100.60; 83.140.50 BS ISO 6194-5:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee
2、 on 30 May 2008 BSI 2008 ISBN 978 0 580 53182 8 National foreword This British Standard is the UK implementation of ISO 6194-5:2008. It supersedes BS 7780-5:1994 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MCE/11, Fluid seals and their housings. A
3、 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 a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from
4、 legal obligations. Amendments/corrigenda issued since publication Date Comments Reference number ISO 6194-5:2008(E)INTERNATIONAL STANDARD ISO 6194-5 Second edition 2008-04-15 Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 5: Identification of visual imperfections Bagues
5、 dtanchit lvres pour arbres tournants incorporant des lments dtanchit en lastomre Partie 5: Identification des imperfections visuelles BS ISO 6194-5:2008ii iii Contents Page Foreword iv Introduction v 1 Scope 1 2 Normative references 1 3 Terms and definitions .1 4 Characteristic imperfections 1 4.1
6、Definition of sealing lip critical area 1 4.2 Type and name of imperfections2 4.3 Typical sealing edge imperfections.2 4.4 Typical sealing lip imperfections (except sealing edge) .5 4.5 Typical spring imperfections6 4.6 Typical outside diameter imperfections6 4.7 Typical protection lip imperfections
7、7 5 Identification statement (reference to this part of ISO 6194) .8 Bibliography 9 BS ISO 6194-5:2008iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norm
8、ally 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 liaison with ISO, also take part in t
9、he 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 task of technical committees is to prepare
10、 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. Attention is drawn to the possibility that some
11、 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 6194-5 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 7, Sealing devices. This second edition cancels and
12、replaces the first edition (ISO 6194-5:1990) which has been technically revised. ISO 6194 consists of the following parts, 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, han
13、dling and installation Part 4: Performance test procedures Part 5: Identification of visual imperfections BS ISO 6194-5:2008v 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 rotate
14、s 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 the seal. Similarly, a designed interference fit between the
15、outside diameter of the seal and the diameter of the housing bore 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 can adversely affect service life. BS ISO 6194-
16、5:2008blank1 Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 5: Identification of visual imperfections 1 Scope This part of ISO 6194 describes seals utilizing elastomeric sealing elements. They are normally considered suitable for use only at low pressures (see ISO 6194-1
17、:2007, 6.1). This part of ISO 6194 defines and classifies typical surface imperfections that can 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. NOTE IS
18、O 6194 (all parts) is complementary to ISO 16589 (all parts), which covers seals incorporating thermoplastic 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 u
19、ndated references, the latest edition of the referenced document (including any amendments) applies. ISO 5598, Fluid power system and components Vocabulary ISO 6194-2, Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 2: Vocabulary 3 Terms and definitions For the purposes o
20、f this document, the terms and definitions given in ISO 5598 and ISO 6194-2 apply. 4 Characteristic imperfections 4.1 Definition of sealing lip critical area See Figure 1 and Table 1. Dimensions x and y were chosen because, in cases of wear, imperfections in this area can impair the function of the
21、rotary-shaft lip-type seal during its lifetime. BS ISO 6194-5:20082 Key 1 lip fluid side 2 sealing edge 3 lip air side 4 optional protection lip NOTE The values for x and y are given in Table 1. Figure 1 Sealing lip critical area Table 1 Typical dimensions of sealing lip critical area Dimensions in
22、millimeters Shaft diameter d 1xayad 1u 50 0,6 1,2 50 120 1 2 aThese are typical values; specific values shall be agreed to between purchasers and suppliers. 4.2 Type and name of imperfections See Figure 2. 4.3 Typical sealing edge imperfections See Figure 2 and Figures 3 to 14 for the following type
23、s of imperfections; keyed elements are identified in Figure 2: inclusion (see Figures 3, 4, and 5); crack (see Figure 6); rough trim (see Figure 7); step trim (see Figure 8); nick (see Figure 9); knit line (see Figure 10); tear (see Figure 11); cut (see Figure 12); filler projection (see Figure 13);
24、 stuck flash (see Figure 14). BS ISO 6194-5:20083Key 1 inclusion 5 crack 9 cut 13 split 2 nick 6 rough trim 10 filler projection 14 flash on optional protection lip 3 step trim 7 knit line 11 non-fill 4 tear 8 stuck flash 12 blister Figure 2 Type and name of imperfections Figure 3 Inclusion: flash F
25、igure 4 Inclusion: filler Figure 5 Inclusion: foreign material Figure 6 Crack BS ISO 6194-5:20084 Figure 7 Rough trim Figure 8 Step trim Figure 9 Nick Figure 10 Knit line Figure 11 Tear Figure 12 Cut Figure 13 Filler projection Figure 14 Stuck flash BS ISO 6194-5:20085 4.4 Typical sealing lip imperf
26、ections (except sealing edge) See Figure 2 and Figures 15 to 20 for the following types of imperfections; keyed elements are identified in Figure 2: split (see Figure 15); stuck flash (see Figure 16); non-fill (see Figure 17); crack (see Figure 18); tear (see Figure 19); blister (see Figure 20). Fig
27、ure 15 Split Figure 16 Stuck flash Figure 17 Non-fill Figure 18 Crack Figure 19 Tear Figure 20 Blister BS ISO 6194-5:20086 4.5 Typical spring imperfections See Figures 21 to 23 for the following types of imperfections; keyed elements are identified in Figure 2: deformed spring (see Figure 21); sprin
28、g with stretched coil portion (see Figure 22); spring with incomplete joint portion (see Figure 23). Figure 21 Deformed spring Figure 22 Spring with stretched coil portion Figure 23 Spring with incomplete joint portion 4.6 Typical outside diameter imperfections See Figures 24 to 26 for the following
29、 types of imperfections; keyed elements are identified in Figure 2: scratch (see Figure 24); incorrect chamfer (see Figure 25); incomplete bond (see Figure 26). BS ISO 6194-5:20087Figure 24 Scratch Figure 25 Incorrect lead-in chamfer on seal outside diameter Figure 26 Incomplete bond 4.7 Typical pro
30、tection lip imperfections See Figures 27 to 30 for the following types of imperfections; keyed elements are identified in Figure 2: tear (see Figure 27); cut or nick (see Figure 28); non-fill (see Figure 29); flash (see Figure 30). BS ISO 6194-5:20088 Figure 27 Tear Figure 28 Cut or nick Figure 29 N
31、on-fill Figure 30 Flash 5 Identification statement (reference to this part of ISO 6194) It is strongly recommended that manufacturers use the following statement in test reports, catalogues and sales literature when electing to comply with this part of ISO 6194: “Visual imperfection identification i
32、s in accordance with ISO 6194-5, Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 5: Identification of visual imperfections.” BS ISO 6194-5:20089 Bibliography 1 ISO 6194-1:2007, Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 1: Nominal dimensio
33、ns and tolerances 2 ISO 6194-31) , Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 3: Storage, handling and installation 3 ISO 6194-41) , Rotary-shaft lip-type seals incorporating elastomeric sealing elements Part 4: Performance test procedures 4 ISO 16589-1, Rotary shaft
34、 lip-type seals incorporating thermoplastic sealing elements Part 1: Nominal dimensions and tolerances 5 ISO 16589-2, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 2: Vocabulary 6 ISO 16589-3, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Pa
35、rt 3: Storage, handling and installation 7 ISO 16589-4, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 4: Performance test procedures 8 ISO 16589-5, Rotary shaft lip-type seals incorporating thermoplastic sealing elements Part 5: Identification of visual imperfections
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